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The Twelve Oldest Trees on Campus

Categories: Landscape, Trees

Middlebury Magazine asked me to help with a story a month or so ago-they were looking for the 10 oldest trees on campus. Naturally, I gave them 12. There were a couple I just couldn’t leave off, and I walk around and still see a couple more I should have added.

Our campus features many spectacular trees, but surprisingly none of them are very old. Charles Baker Wright, Professor Emeritus of Rhetoric and English Literature , in the Middlebury College News Letter of 1931 talks of the story of campus trees, and how early in the history of the college was an old time notion that “trees wouldn’t grow on that hillside”, and how finally in about the 1830’s trees were planted wholesale, so thick that 70 years later Old Stone Row was a ‘veritable thicket’. Other areas of campus were likewise barren of trees, but didn’t have the donations to plant like near the Row. (as always, click on the picture for larger version) (especially to see the guys in the top hats)

Painter Hall in 1879

Painter Hall in 1879

Painter Hall 2014 Note large Sugar Maple in picture, smaller in picture above

Painter Hall 2014
Note large Sugar Maple in picture, smaller in picture above

Some of the more dramatic pictures were taken along the back of Old Stone Row, on the road that was called Waldo Avenue.

Starr Hall 1890

Starr Hall 1890

Starr Hall 2014

Starr Hall 2014

Old Chapel 1875

Old Chapel 1875

Old Chapel 1895

Old Chapel 1895 

 

Old Chapel 2014

Old Chapel 2014

Another sad chapter in the arboreal history of Middlebury is Dutch elm disease, which you can read much more about on other pages in this blog. Many areas presently bare of canopy from shade trees are previous Elm locations. This is not all bad-views from Old Chapel Road to Mead Chapel are greatly enhanced by the clear lines of sight.

A football game in 1900. Note the large elms along the west side of Painter Hall.

A football game in 1900. Note the large elms along the west side of Painter Hall.

Same view 2014

Same view 2014

The Spring issue of the Middlebury newsletter in 1981. Those are elm trees lining Mead Chapel walkway behind the May pole (which Facilities still has stored somewhere!)

The Spring issue of the Middlebury newsletter in 1981. Those are elm trees lining Mead Chapel walkway behind the May pole (which Facilities still has stored somewhere!)

 

2014-no May pole, and sadly no costumes.

2014-no May pole, and sadly no costumes.

Mead Chapel 1942

Mead Chapel 1942

Mead Chapel 2014

Mead Chapel 2014

Trees have a lifespan, like us, and it may be useful to think about tree years the way many people think about Dog years, but with no set figure to multiply.  A redwood is ancient at 2000 years old, Bristlecone Pines date to 3500 years old, while a Poplar tree is old at 40. I’d venture to say an old tree for Vermont is 300, with precious few of them remaining.

A great grandma of all the trees on the Middlebury campus is a spectacular Bur Oak on the north side of the Mahaney Center for the Arts. Fellow horticulturists have estimated an age of easily 250 years old. Even in tree years, this one’s sitting on the porch rocker being waited on hand and foot. Trees like this, particularly oaks, were often left as boundary markers for property, and would be referenced in deeds and other legal documents. Aerial photographs of the area show this tree sitting next to Porter Fields, the combination baseball/soccer fields for years. It was there long before Baseball. I’ve written about this tree before.

Bur Oak at the Mahaney Center for the Arts

Bur Oak at the Mahaney Center for the Arts

Paper Birch is, like all birch, an early successional tree, born to live fast, set seed, and die young. This tree isn’t very old in human years (I’m guessing about 85-90), but a mature birch is only 45-50. Proof that the right tree in the right spot will do wonderful things. This tree would be a grandparent too, one of those impatient ones yelling at the grandkids to keep off the lawn. It is safe to assume this birch was planted by the former owners of the house (the McKinley’s, I think, as that is what we call the house). Paper birch is an extremely popular landscape tree, but prone to many diseases which shorten the lifespan.

Paper Birch at the McKinley House

Paper Birch at the McKinley House

Nearby there is an elm along Route 30 next to the field house. I often wonder about all the construction it’s been watching over the years. Our guess is about 175-200 years old, an old survivor from when elms were transplanted from the woods to line the rudimentary roads of the new country. Old photographs show elms lining both Route 30 and 125, and we work hard to save the few that remain. This one’s middle aged in tree years, elms can go for many decades more than this one has been around.

American Elm at Field House

American Elm at Field House

Norway Spruce grow fast when young, and get leisurely in their middle age. The massive Norway spruce north of McCullough was planted as part of a windbreak to protect the athletic fields next to the gym. Photographs from 1890 show already mature trees next to the baseball field, making this spruce easily over 150 years old. This tree is unusual for a Norway spruce in that the main stems are going through reiteration-the bottom stems forming entirely new trees, so looking up from the base into the canopy of this tree one would see multiple trees sharing a single trunk. This is much more common in Redwoods, but clearly this spruce dreams big.

Norway Spruce

Norway Spruce

 

Old Stone Row and the Main Quad in 1890-the large Norway spruce is in the closer row

Old Stone Row and the Main Quad in 1890-the large Norway spruce is in the closer row

Old Stone Row and the Main Quad 2014

Old Stone Row and the Main Quad 2014

Another perspective on teh spruce row-1892

Another perspective on the spruce row-1892

Same perspective as above 2014

Same perspective as above 2014

Hepburn Hall in 1929

Hepburn Hall in 1929

Hepburn Hall 2014

Hepburn Hall 2014

Up the hill from the spruce is a Black Walnut, probably 80-100 years old. It’s a middle aged tree as well, but was part of the extensive gardens of Maude Mason planted to the south of Hepburn. Most walnuts live to about 150 years old, but in the right location (which I hope this spot is) can go over 400.

Black Walnut at Hepburn

Black Walnut at Hepburn

This walnut was probably planted as part of extensive gardens to the south of Hepburn at the beginning of the century. There was an old cottage nearby as well. The only remnants left of this landscape is a small garden with a plaque on the top of Stewart Hill dedicated to Maude Owen Mason, ‘who planned and planted and tended it from 1916 till 1937′. The garden has since been overcome by Mugo pine, a great example of breaking Tim’s first rule of landscaping-’If it looks good when it goes in, it’s too crowded’.

Hepburn Hall Gardens in  1937

Hepburn Hall Gardens in 1937

Hepburn Hall 2014

Hepburn Hall 2014

 

The former Battell Cottage, now known as Adirondack House, has two very large Austrian Pines in the front yard facing Route 125. A picture from 1929 shows one of them fully mature, making these an impressive 150 years old or more. In tree years, very old.

Austrian Pines at Adirondack House

Austrian Pines at Adirondack House

Adirondack House-1929 Austrian Pine on right side

Adirondack House-1929
Austrian Pine on right side

Adirondack House 2014

Adirondack House 2014

3 Black Maples, a close relative of Sugar Maple, remain in a row along Storrs Walk next to Old Chapel. This is the area of campus heavily planted in the 1830’s, and these are the only remaining trees left. At 185 years old they are reaching the end of their typical lifespan, but we are actively preserving them, and hopefully will be around much longer. I’ve written of Black maples in the past.

Black Maples at Old Chapel

Black Maples at Old Chapel

Old Chapel -1895

Old Chapel -1895

Old Chapel 2014

Old Chapel 2014

Old Chapel 1900

Old Chapel 1900

Old Chapel 2014

Old Chapel 2014

Old Stone Row 1910-Black Maples in center background of picture

Old Stone Row 1910-Black Maples in center background of picture

Old Stone Row 2014-Black Maple in center left of picture

Old Stone Row 2014-Black Maple in center left of picture

A photograph from 1947 shows a couple of Sycamore trees planted alongside the road across from the Student Union Building, where Proctor is now. The trees were reaching maturity then, so they are only 85 years old, but one is massively large, once again the right tree in the right spot. So much for trees not growing on that hillside.

Sycamore near Proctor

Sycamore near Proctor

Old Student Union Building-(where Proctor is now) -1947 Sycamore tree in center of photo

Old Student Union Building-(where Proctor is now) -1947
Sycamore tree in center of photo

Same view 2014

Same view 2014

Another view 2014

Another view 2014

Near the Gravity monument by Warner science is a Littleleaf Linden, a tree the British call Lime trees. This one sets the state record for size, with an estimate of age of over 100 years. Its growth rate has slowed considerably; she’s reaching old age gracefully now.

Littleleaf Linden at Warner Science

Littleleaf Linden at Warner Science

Aerial photographs from 1942 show the Pin Oak to the south of FIC gracing the front yard of a house there, with Chateau in the back yard. We estimate this tree at about 125 years old, a teenager for an oak.

Pin Oak by FIC

Pin Oak by FIC

Same aerial photograph-an apple planted next to what looks like gardens. This makes sense, as that entire area of campus has a proliferation of Pear trees similarly old we know nothing about. This tree is probably about the same age as the Pin Oak, but quite a bit older in Tree years.

Apple tree by Coffrin

Apple tree by Coffrin

The oldest tree (in tree years) on the campus is also one of the youngest in human years. Yellowwood is a pretty little tree with Beech like bark and pendulous white flowers in the early summer. The tree tends to branch low with multiple trunks, and falls apart after 50 years or so. Ours is probably 75, with multiple steel brace rods holding the trunks together.

Yellowwood tree by Hadley Milliken

Yellowwood tree by Hadley Milliken

Many thanks to the Digital Media archives, where I spent an enjoyable day in front of the woodstove on the laptop-any use of their pictures should go through them (I’m talking to you, Pinterest) All new pictures are my own.

Middlebury’s Elm Collection

Categories: Landscape, Trees

Among various tree geeks in New England Middlebury is well known for our Heritage Elm Collection. Elms, of course, naturally succomb to Dutch Elm Disease if we humans aren’t very proactive. We treat 28 old Elm trees, some of which are over 150 years old. I’ve written a couple new pages on them, one a general overview of all of the elms, one a brief primer on Dutch Elm disease and how we maintain the trees, and a final page on the history of the elm tree at Middlebury.

12-Elms

Elms have that classic umbrella shape, but can vary from specimen to specimen. We are fortunate to have trees in a wide variety of sizes and shapes, from the low spreading type like the Dog Elm behind Munroe (yes, we’ve named some of them), to the spectacular high and arching Field House elm. We also have been planting disease resistant varieties, such as Accolade Elm.

I remember a conversation with one of our seasonal employees several years ago, and we were discussing the difference between botany and horticulture. He cited the elm as a good example. Botanically, we will always have elm trees. They don’t die from Dutch elm disease until past their reproductive years, so they will always set seed and produce more young. And looking at them from a geological time perspective, eventually they will develop resistance, although that may be many millennia. Horticulture, though, is as much art as science, and as horticulturists we preserve some of the grandeur of an old elm, and we remember the dignity of the old shade tree as it was, even as we work towards bringing them back.

Tree Map Updated

Categories: Landscape

Having run inside, fleeing from the sub zero temperatures outside today, I spent the day updating our ArcGIS tree map with all the newly planted trees this year, as well as our removals. Seems like a good time to point towards the Campus Tree Map page, or go/treemap. The latest map contains all the trees we individually manage on campus, nearly 2500. Maybe if the cold spell lasts we’ll come up with a smartphone compatible tour…

Blind Sidewalk

Categories: Landscape

Landscape architects sometimes speak of ‘desire paths’-a phrase that means exactly like it sounds. Laying out sidewalks, driveways, or trails is considerably harder than it looks. A budding architect can either be a hero for guessing exactly where pedestrians want to walk, or a goat for taking an urban mentality and assuming people will use the sidewalk regardless of location.

Try as we might, the Middlebury campus is full of desire lines. Some are an easy fix. Two new sidewalks cut across the top of the Atwater quad based on dirt paths that had appeared post-construction based on pedestrian traffic flow. One that couldn’t be done, a dirt path from the Johnson Parking lot to Atwater dining, we tried to block with trees and shrubs, but the desire remains unabated. Another one that concerns us is a dirt path from Battell Beach heading toward Milliken Hall. This cuts in a straight line up slope, and is becoming so worn down that it may soon start to erode.

Dirt path behind Allen Hall

Dirt path behind Allen Hall

A new desire path appeared after the renovation of The Axinn Center at Starr Library. The northeast corner of the building, down by Route 30, houses several large classrooms, and students cut across the quad from the Main  library down to that corner.

Not that we blame the pedestrians. It’s cold here. Getting from point A to point B as quickly as possible makes campus life a little more tolerable in January and February. It’s a pretty obvious place for a walk, but the problem is the other walks in the space.

Before my time, the walk ways were redone, and came out beautiful. This is landscape architecture at it’s best. Gently curving paths arc across the space, connecting the buildings that surround the quad. The brilliance of the plan is the fact that they work. In colder climes like ours usually corners are cut, curves straightened, and shortcuts abound. The desire line from the library to that corner was, as expected, straight, and pouring this as a walk would break the beautiful rhythm of the rest of the walkways.

pathways plan view

Then, after one winter storm, the path was beaten through the snow, this time gently arching around some trees, eventually meeting the walkway to the library.

pathway zoomed

With this proof of concept, we were off and running. Last summer we went out to the quad with surveyor flags, and marked a potential route. Some language school students became willing test subjects, and we tweaked the lines for an hour or so until it flowed right.

The other, even more subtle brilliance of the walkway layout in the library quad is the way the sidewalks are blind, hidden from view. I bet few people have noticed this, but a picture makes it obvious.

2013-08-19 07.46.49

View from Route 30

Looking up from Route 30, the quad appears to a large expanse of lawn, unbroken by walkways. The art is in the subtle placement of the walkways. All of them are slightly built up on the route 30 side, and pitch towards Old Chapel Road. Leaning the other way, the flat expanse of the walk would be visible, but the design at present allows them to be blind, not seen from the road. Obviously that couldn’t be done had the road been higher than the quad, but geology and geography was on our side this time.

The new walk was tricky to match this effect. Its placement across the quad required some elevation of the surrounding area, as well as some grading to continue the natural water flow across the lawn. Had this been interrupted the sidewalk would pool water and turn into an icy mess.

2013-08-14 14.36.04

The Butternut Seed Orchard

Categories: Landscape

I’ve learned this summer a wonderful way to get attention is to build a one acre, 8′ high deer exclusion fence out on South Street past Eastview, brush hog down the existing corn, and not tell anyone what we are doing.

The landscape department, working with the State of Vermont, the US Forest Service, and a local researcher from UVM (Dale Bergdahl, father in law to local Middlebury College hero Mike Kiernan) applied for and received a grant from the Vermont Department of Forest, Parks and Recreation to erect the fence to grow Butternut trees. Butternut is threatened by Butternut Canker, a fungus with the potential to wipe out all Butternut across the United States. When found, disease resistant trees are grafted and grown for seed. An orchard was already established in Brandon, but another in a different locale (geographical as well as horticultural) is always preferred.

Deer love young butternut trees, hence the fence.

I’ve written a large explanation on the project on the blog here, it’s an entire page-Butternut Seed Orchard. I should give profuse thanks to Barbara Schultz, the forest health program manager in the Vermont Dept. of Forests, Parks and Recreation for an immense amount of work to make it possible,  Chris Casey  of the US Forest Service and Tom Simmons of the Vermont Dept. of FPR. And also, most importantly, local volunteer Sally Thodal for helping plant Butternut trees on one of the hottest days of the year.

Feel free to email any questions you have, and say hi to the trees as you drive by.

Arbor Day 2013

Categories: Landscape, Trees

It’s been a gorgeous spring, and we’re celebrating with a huge Arbor Day celebration. Plan on joining us May 14th, details below. But in the meantime…

love a tree? share the love. send us photos, poems, and other art about your favorite campus tree. Submit a photo, or post on twitter with #middarborday. submit by may 10 to have your tree featured in the arbor day tree-k race! Either go twitter (@middland) or send to tparsons (at) middlebury.edu to submit. Prizes, fame, fortune, and good tree karma await. And the winning trees will become the basis of the second annual Tree-K race around campus (run 5-K,, and learn the names of 5 of the trees along the route to win) A kid’s race will be held as well. Winners receive gift certificates to the Grille.

The days events will be as follows:

Campus Tree Tour-join us for a walk around campus and learn about some of our woody friends. The tour starts at the McCullough Plaza at 2 PM, and wends its way through campus until about 3:30, when we will end up north of Battell Hall, where we-

Plant a Tree- a whole bunch of trees will be awaiting your tender loving care to be planted north of Battell Hall and in between Allen and Wright Theater. If you’ve never planted a tree this is something you should do-it will still be here for all of your reunions, like the rest of your old friends you’re eagerly awaiting to see. Afterwords, you can run or watch the-

Tree K Race-run about a 5-K loop around campus to all the various favorite trees nominated by the Middlebury campus community. Winners will receive prizes, and all kids will as well. Not too strenuous, as you’ll need to save strength for-

Food, music, and ice cream-We’ll be on the Atwater plaza, with a cookout by Grille Catering using local foods, ice cream, and listen to music by Will Cuneo and Rita Pfeiffer. Enjoy the sunshine for an hour or two before heading back inside to study for finals. A huge thank you to the Environmental Council for funding us!

So spread the word, let your neighbors know, and come celebrate our campus forest.

Bark Mulch

Categories: Landscape

June may smell like roses, May smells like Lily of the Valley in my mind, but spring, sweet, sweet spring, smells like bark mulch.

Like many things in Horticulture, mulching really isn’t for the plants, but for us. Meant to imitate the look and ecosystem of a forest floor, mulch does neither, but it is not completely benefit free either. Mulch can help regulate soil temperatures in summer and winter, helps retain soil moisture, and can also help keep weeds out of the space. A little can go a long way, though, and as we’ve learned here, mulch is not something to just put down and forget.

Mulch can be a variety of materials, but let’s focus on tree bark and wood chips. On campus we use a double ground spruce/hemlock mix locally made in Newport, but that’s really all about looks. I used to be one of those people selling bark mulch, and so would steer people away from using (free) wood chips, but I’ve since recanted. The handy excuse I would use is that the as chips break down through normal soil processes they steal nutrients from the soil, and therefore the plants, but this  has not been supported by research. And in fact a good mixed load of chips, twigs, leaves, and needles from the back of a typical arborist’s truck seems to imitate the duff of a forest floor nicely, and is becoming the preferred mulch for some. If you are interested, some good reading on this is published by Dr. Linda Chalker-Scott of Washington State University.

I used to say 3” of bark mulch was the right depth. I now think that’s too much and 2” is probably fine. Mulch too deep can actually inhibit water from reaching down to the roots, and/ or cause shallow rooting of trees. This is easy to see either by a white fungus growing throughout the mulch, or by roots growing right through the mulch.

2012-12-06 14.33.46

White Fungus hiding in bark mulch

2012-12-06 14.34.11

Shallow roots at base of River Birch

Too much of a finely shredded mulch can also decrease oxygen to the soil and roots. Unlike leaves, which make oxygen, roots require oxygen for respiration, and a thick layer of mulch will prevent good gas exchange between the soil and the atmosphere. The white fungus seen above has the added nastiness of turning the mulch hydrophobic, or water repellant. The mulch not only will not allow water to pass through, but will actively repel water right from the top, and let it run off.

Another thing I ignored in the past was the edict of not placing mulch against the trunk of the tree. I’d personally never seen any harm or problems by this practice, and being a busy landscaper, never took the time to push back the couple inch ring of bark mulch from around the trunk.

A gingko tree has recently proven me wrong. We’d noticed this tree declining for several years, and given the pattern of decline, assumed it was something wrong with the roots, like compaction or too abundant moisture. Closer inspection at the root flare (the most critical part of any tree) showed a ring of decay circling the entire tree, preventing all the nutrients and some of the water from its proper flow within the cambial layer. This decay was undoubtedly caused by the mulch against the trunk, and can be directly implicated in the death of the tree.

IMG_0155

Weak tree-notice tip dieback

IMG_0159

Ring of rotted wood at base of tree

Even if the mulch did not cause the bark to rot away, the constant moisture against the trunk, like the roots in the example above, decrease gas exchange. The trunk needs oxygen much like the roots, and can’t do this when it is constantly moist from mulch.

So my new mulching recommendations are these. Mulch is good, about 2”, real shredded bark if you can afford it, wood chips if they are free. Avoid the dyed mulch, which just plain looks tacky. Don’t blindly put a new ½” to 1” of mulch on top of last years’, better to dig down in the old mulch to look and see what is going on. Maybe stir the mulch up some, break up any hydrophobic layers, or add some compost for a biological kick in the pants to break down the existing mulch and closer imitate a forest floor.

And stone pebbles for mulch? Only in a zen garden, please.

My Latest Heartbreak

Categories: Landscape

No, not the song by the 22-20′s.

The plant vandalism on campus continues. We’re on year four, and I’ve been trying to document all the cases. The tally stands at 62 incidents in the last four years, 10 in 2009-2010, 25 in 2010-2011, 9 in 2011-2012, and 18 so far this school year.

Will Henriques wrote an excellent article for The Middlebury Campus on our spate of tree and  plant vandalism, after interviewing both myself and Brian Marland, a student in my winter term course who wrote a term paper on tree vandalism.  The thrust of Brian’s paper was how plant vandalism is an inherently violent act, and how this is more than likely related to alcohol consumption. Not even consumption by the vandals. Studies he found show an increase in violent tendencies by people not even drinking, but merely in the presence of alcohol or alcohol advertising. Brian writes, “aggression is no longer viewed as an unwanted result of drinking, but instead is seen as an expected condition.  Therefore, students may be committing vandalism in order to meet these expectations and produce a reputation among their peers.  When surrounded by a drinking culture, these expectations of aggression may fuel behavior that would not occur otherwise among these college students…While living in an environment where alcohol consumption on the weekends is common such as a dorm, a college student does not even need to consume alcohol to be subject to the aggressive thoughts and behaviors that may follow alcohol cues such as a beer bottle.  This revelation is instrumental in understanding the acts of tree vandalism that plague the Middlebury College campus.  After drinking, many students travel in groups to parties in other locations, and even if a person in this group had not been drinking, their behavior will still be subject to aggressiveness from exposure to alcohol cues.  They will be much less likely to interfere with or report senseless acts of vandalism in this heightened state of aggression.  Therefore, in an environment of alcohol consumption on a college campus, all students exposed to the environment may be suspect to increased aggression.”

I’ve written about the violence against the trees in the past, and we continue to see the same acts again this school year. The classic example would be an elm tree planted 2 years ago for the Atwater landscape project, rocked back and forth, and the 300 lb. root ball pulled up out of the ground and left on top for an entire weekend.

Elm Tree at Atwater

Elm Tree at Atwater

Sadly, this wasn’t the only tree torn from the ground this year-two more that were planted last spring were pulled during winter term.

As Will’s article alluded to, and Brian summarized well in his paper, the damage seems to be focused not necessarily around party locations (little damage is seen in Ridgeline, for example), but seems to be on pathways to and from these locations. I recently mapped the locations of the incidents for the last four years, and have included it below.

Tree Vandalism 2009-2013 Click for larger size

Tree Vandalism 2009-2013
Click for larger size

I continue to struggle with solutions. Some communities post signs next to the damage. I hestitate, thinking about how within the next year I’ll be going on school tours as a parent. Surely the article in the Campus is a great start, as will be our annual tree planting for Arbor Day (May 14, mark your calendars now). We’re a small community, we have to take care of each other, and that would include our campus forest as well.

Watering

Categories: Landscape

Pick up any plant biology book, and they consistently list the three macro nutrients all plants need as N, P, and K, the chemical symbols for Nitrogen, Potassium, and Phosphorus. But really, what we share with plants is a need for ‘macro’ macro nutrients, something so profoundly necessary that the books don’t even feel the need to list them, and they form the backbone of all life. We’re talking about C, H, and O, or Carbon, Hydrogen, and Oxygen.

The carbon and the oxygen are easy, the plants are getting that in the air we breathe. It’s the Hydrogen that’s been stressing me out lately. Plants obtain it solely from water, through photosynthesis. I always remember my snide remarks in the retail garden center world, when a customer would ask me what kind of fertilizer to buy with their new purchases. For the most part, I’d tell them the single greatest thing they could do would be to water.

How much? It’s a good question with no real definitive answer. I remember from who knows where that gardens in the northeast need about 1/2″ of rain a week in the growing season, and an article on strawberry production I found says about the same (actually .63″). Trees need quite a bit more, though, as they have much more extensive roots throughout the soil horizon. Plan on 2″ of rain a week. I found a handy online calculator to do the math, but here’s a quick answer. A newly planted tree with about a 2″ trunk, should have a 5′ x 5′ zone watered around it, so that’s about 30 gallons, pretending to be a 2″ rain.

Sounds a little high, but the wild and woolly world of plants is never easy.  Last year we were averaging 4″ of rain a month, and we didn’t have to do any supplemental watering. On cloudy days plants don’t transpire, or lose water, at as great a clip, so maybe last year it was fine.

Or not. We’re running around like chickens with our heads cut off right now, watering every tree we’ve planted for the last 3 years. (that’s a lot) All of our recently planted trees are showing drought stress, and I’m wondering if I hadn’t watered enough in the last 2 wet years to well establish the trees. When watering, it is best to water a lot all at once, so that the roots have ample moisture and can grow long and deep. Too little water, and the tree keeps its roots near the surface, where the water is, and this makes it less drought resistant in the long run.

Gator Bags for Watering

We water all trees with 40-50 gallons of water about every 2 weeks. We use two gator bags zipped together, and they drain over the course of about a day. We hand water any tree we missed, and then gator bag it. In this heat and drought, I’d like to water weekly, but I’ve been checking the ground around the trees, and I think we’re keeping up.

Another good trick I learned once when hand watering is to watch the ground as it absorbs water from the hose. I think this is the one of the Eliot Coleman gardening books, but I loaned my copy out and now it’s gone. Once the ground starts to get saturated, the top gets glossy. Take the hose off that spot, and the glossiness will disappear. If you can count to 3 before the glossiness is gone, the ground is moist enough.

Drought stress symptoms in Birch

identifying drought stress in plants can be tricky, especially in herbaceous plants like annuals and perennials. Woody plants are easier. The inner leaves of the tree turn yellow and fall off. I find this remarkable. It isn’t like trees have brains, but here they are smart enough to drop the inner, less efficient leaves, to conserve its precious water for the maximally producing outer leaves. By the time your plants are showing symptoms of drought, obviously much damage is done. Plants are pretty hardy, so even with serious problems the tree will probably be fine.

Arbor Day 2012

Categories: Landscape

I measure my life in tree plantings.

Every time I come home from the Burlington airport, I drive down Dorset street in South Burlington and visit a Blue spruce I planted on a landscape job my first year out of college, 1989. It’s over 40 feet tall now, making me old.

A paperbark maple in front of my mom’s house in Connecticut is a lot smaller, but slows traffic down on the road in it’s awesomeness. A pair of honeylocust in front of a local church down there planted at my very first landscaping job now towers and dominates the little front yard. A Kentucky Coffeebean tree in my side yard in Weybridge planted when we moved in about 11 years ago is now starting to look like an actual tree, the trunk about 4″ now (it started small, I’m cheap).

Middlebury College has once again been certified as a Tree Campus by the Arbor Day Foundation, and the landscape department is celebrating by planting trees (naturally). Come join us Friday afternoon from about 1-4 just north of Battell as we plant 5 large shade trees. The holes will be pre-dug, so it won’t be too much work. (Sorry, can’t let you run the backhoe, I would if I could). Here’s your chance to make a mark on the Middlebury campus, and always have a friend to come visit when you return to paradise.

Or maybe we can call it my open office hours, no appointment necessary. Visits need not  be limited to 15 minutes.

Map of the Tree Planting-click for larger size