Category: Outdoors

Whatever happens, keep planting and learning

At the end of the year I always like to take a little time to reflect on what worked well in the garden — and what didn’t. This year I also called some gardening friends — some experienced, some less so — to ask what they had learned.

I’ll go first. In 2021 I planted some bare-root oaks I bought from the State of New Hampshire and planted them for a client in an open meadow in what had previously been a lawn. Most did well last year and really took off this year. Based on that success, I planted even more this year in part because I could get unusual trees not available locally — northern pecan, hardy persimmon, pawpaw and more. We’ll see how they do next year.

Bare-root trees are usually the thickness of a pencil and have a foot or so of root with 18 to 24 inches of bare trunk. Although I found a grower in Vermont willing to sell them to me, most growers sell them to nurseries that pot them up and sell them in a year or two. But if you go online you can find growers who will ship bare-root trees and shrubs in the spring. They are easy to ship — no soil is included — and are less expensive than trees that have been tended and watered for a couple of years.

The downside is that bare root trees are generally only sold when dormant, and need to be planted soon after arrival. Some growers keep big coolers full of bare-root material, but you still need to get them in the ground soon after you get them. Look for them now and order what you want for spring delivery.

A friend bought a house in southern New Hampshire and had her first vegetable garden this year. She was surprised and delighted that there was no blight on her tomatoes. This did not surprise me at all. The fungus that blights so many tomatoes lives in the soil, and in a new location it rarely shows up until Year 2.

She also reported that some of her new raised beds were placed on ground so hard that she couldn’t even get a shovel in it. The wood beds were 8 inches tall but didn’t drain well, and none of her root crops did well. In the spring she is going to dig out the soil, remove the beds, and put 2 inches of coarse sand on the ground. Then she will replace the wood-sided beds and soil, and hope for the best. I predict that will solve the problem, particularly if she adds lots of compost to the soil in the beds.

Another friend was reminded this year that if a perennial is not “happy” where it is planted, you should move it! She said she had divided some phlox and, lacking a good spot for it all, put some in a place that was too shady for it. So she dug it up and moved it to a better place late in the season. Almost anything can be moved; just do it on a cool cloudy or rainy day. Even peonies can be moved if you are careful.

Another friend said that he learned to use hydrogen peroxide as a preventive for fungus on grapes. He bought some industrial-strength peroxide (30 percent concentration) and diluted it (10 parts water to one part peroxide). He then filled his big sprayer to apply it. He sprayed after pollination but before the grapes had appeared. Unlike chemical sprays, he says, it just breaks down to water and oxygen.

Another friend moved to Vermont from New York and has been working to maintain and personalize the large flower gardens that came with the house. She has learned to focus on one area at a time. She also said she has learned that it is important to act on your own ideas, even if you have inherited wonderful gardens. I agree. For example I learned that I love flowers called burnets (Sanguisorba spp.) and I collect them.

Burnets bloom in mid to late summer and come in size from miniature (6 inches tall) to huge (6 feet tall) and do best in sun with moist soil. Each year I add a few. My most recent addition is a S. hakusanensis called Lilac squirrel. I think of it as “the pink squirrel” as its blossoms are fuzzy and much like a squirrel’s tail, though much smaller. Mine are pink, not lilac in color. Not common in most garden centers, it is available from Digging Dog Nursery in California.

So yes, we all learn new techniques, try new plants and do our best to be good gardeners. All my best to you for the year ahead.

Featured photo: ‘Lilac Squirrel’ Sanguisorba blossoms are delightful to touch and see. Photo by Henry Homeyer.

Put on a hoodie and shake off the snow

We recently got hit by a big winter storm that dropped at least 15 inches of heavy, wet snow. It clung to branches, breaking some and bending others to near their breaking points. If you suffer the same sometime this winter, here are some things you might consider to help your woody plants.

First, the best thing to do is be proactive. Even before the storm had finished I went outside and started shaking branches to get snow off them. Wear a hoodie! Snow can go right down your neck if you don’t. For shrubs and small trees, you can shake the central stem, and it will clear the snow from the entire plant. For larger trees, you will need to shake individual branches.

A good tool for clearing snow is a bamboo pole, the longer and thicker the better. Some hardware stores and feed-and-grain stores will have them. I used one to knock snow off branches I couldn’t reach.

So what can you do to repair cracked and broken branches? Generally, nothing. Take a sharp saw or loppers and remove the branch back to its point of origin — the main trunk or a large branch. But don’t cut flush to the trunk if you can avoid it. And never leave a stub as it will have to rot back to the branch collar to heal.

The tree heals itself at what is called the branch collar. The branch collar is a swollen area at the base of each branch. If you cut that off flush to the trunk, it will be harder to heal and take longer. Often the branch collar has ridges or rings around it, and you should leave them in place.

Two winters ago we had a big snowstorm and my small leatherwood shrub (Dirca palustris) split up the middle. The break was not complete: There was still an attachment point for both halves of the shrub. I didn’t notice the damage for a few days, but when I did, I decided to try to repair it.

Grafting is a well-known but difficult skill whereby a skilled person can add a branch to a living tree. This is most often done with fruit trees, allowing orchardists to add other varieties of apple on a tree. I have an apple with three different flavors of apple because it had other varieties grafted to the original tree. Truth be known, the tree came like that. I’ve taken classes in grafting and tried to do it, but have never succeeded. It’s an art.

But back to my little leatherwood tree. Because it was still hinged at the bottom of the break, I moved it back together and used some stretchy green plastic tape to wrap the two halves together. I wound it tightly, and lo and behold, it worked! I removed the tape (which is usually used for tying flower stems to stakes to keep them from breaking in the rain) after two or three months. Now, two years later, the shrub shows no signs of ever being damaged, other than a little scar tissue.

What else did the storm do? It almost flattened a small grove of willow trees I had planted 20 years ago. They are a variety of Salix integra called Hakuro Nishiki. Very popular, these willows have tri-colored leaves (green, white and for part of the summer pink) and are fast-growing. There is nothing I can do for them. They are bent over and weighed down by snow, but should recover once the snow melts in a week or two. And if they don’t spring back up? I will lop off the bent stems and let them re-grow. It’s difficult to kill a willow, and they should have been shortened long ago.

The storm also knocked down a large tree on our property, a wild black cherry (Prunus serotina). The black cherry doesn’t produce cherries we can eat, but birds eat them. The fruit is just a third of an inch across with a pit. Not much food for anybody, really. The blossoms are not important, either, but it is a good plant for pollinators, one of the keystone species.

The tree we lost had a diameter of 14 inches at its base and stood over 67 feet tall — I measured it after it fell. It was not one I had planted, but a bird probably dropped a seed in our woods. I will count the growth rings when it gets cut up for firewood. Where it grew is a good example of where not to plant a tree.

So what was wrong with our tree? Most trees do not have tap roots going down deep into the soil. Two feet is probably average. But they spread widely. I was told in a horticulture class to think of a tree as a wine glass sitting on a dinner plate. The plate represents the root system, the wine glass the trunk and branches.

But ours was growing right next to a rock ledge that was actually showing above ground. The roots could not grow that way, so all the roots were on just three sides. The wind came from the fourth side, and with the snow load, it blew over. So if you plant trees, be mindful of bedrock and ledge. Keep away from them. You can use a steel rod or crowbar to poke the soil to find ledge before planting.

Although I will miss that big tree, I try to never mourn a plant that dies. After all, it provides me a chance to plant something else there. My best wishes to you all for the holidays.

Featured photo: Cut back a broken branch to the branch collar. Photo by Henry Homeyer.

Pruned trees for outside, cut branches for inside

Normally at this time of year I can go out to the stream behind my house and pick stems of a shrub called winterberry (Ilex verticillata) to use in vases and on my wreath. It is generally loaded with small red berries that persist until mid-winter when hungry birds eat them, or they just plain fall off.

Winterberry is a great decorative shrub in winter that prefers wet feet but will grow in ordinary garden soil too. It is dioecious, meaning that it requires male and female plants — usually one male will take care of all the females. This year I didn’t get many of those bright red berries I like so much for decoration, and I have heard from other gardeners that they had few, too.

This prompted me to walk around my property looking at my woody shrubs to see what might substitute for winterberries. I didn’t find any berries at all. But I did cut some red-twigged dogwood (Cornus sericea) to use in a vase, and some budded branches of a Merrill magnolia (Magnolia x loebneri).

The magnolia buds are a bit like pussywillows on steroids: an inch long and very fuzzy. I have some in a vase on the table, and they look very good, and will for many weeks ahead. I’ve done this before, and will occasionally get a few buds to open into white flowers. I cut some greenery to go with them, a few stems of white pine. Hemlock would look good instead, but doesn’t hold needles well indoors.

It struck me that winter can be pretty bleak for people who don’t have nice-looking winter shrubs and trees. Judicious pruning can transform a messy tree full of small branches going every which way into sculpture. I recently helped a client prune a 50-year-old Japanese maple into sculpture that will keep it looking great for several years — with only a few minor pruning cuts each year.

When pruning, I ask myself, what will this little branch, currently the thickness of a finger, look like when it is the thickness of an arm — or a leg. If it is growing sideways toward a walkway, it must come off. Going through the middle of the tree? Remove it! The maple I pruned had many small dead branches that had been choked out because bigger branches had blocked off the sun, effectively starving them.

Bark is important. I like plants that have exfoliating bark, which means bark that is shaggy and peeling off — thus showing more than one color. My Seven Sons Flower Tree (Heptacodium miconioides) is one of those. In addition to the nice bark it offers me a display of small white flowers each fall. White birch (Betula papyrifera) and river birch (Betula nigra) are others with interesting bark. In fact all the birches have handsome bark.

I’ve been growing a paperbark maple (Acer griseum) for about 20 years. It has lovely shaggy reddish-brown bark that is very handsome. It is a very slow-growing tree, at least in this climate. It is listed as a Zone 5 plant (good to minus 20 F) but mine has survived colder temperatures. It looks great in winter.

One of my favorites — but one I do not grow — is sycamore (Platanus occidentalis), which I knew growing up in Connecticut but is rare in New Hampshire where I live. It reminds me of the English plane tree, so common in Europe. The bark peels off in big swaths, showing light gray-green in some areas, dark brown in others. It is just barely hardy to Zone 4, and prefers to grow in river bottoms, but will grow in drier soils, too.

Of the bigger trees, I like American beech (Fagus sylvatica) for its smooth gray bark. Unfortunately, beeches are prone to a fungal disease that mars the bark and eventually kills the tree.

That same smooth bark is a prominent feature of a shrub known variously as shad bush, serviceberry and Saskatoon bush. All belong to the genus Amelanchierbut bear different species names. Most are multi-stemmed bushes that get no more than 10 feet tall, though I have a wild one more than twice that height. Their blossoms are similar to apple blossoms. They do well in partial sun, often growing and blooming on roadsides.

Apple trees, particularly crabapples, can look great in winter. Some crabs hold onto their fruit throughout much of the winter, some drop their fruit in fall and many provide fruit for the birds to eat (that disappears before winter is done). Ask at the nursery when you buy a crabapple if the birds like the fruit. The form and bark of a well-pruned apple or crabapple is gorgeous to my eye.

So if your landscape has little to offer you in winter, plan on adding some winter interest come planting time. And if your trees and shrubs are drab, think about adding some strings of little winter lights to brighten them up, at least at night.

Featured photo: Merrill magnolia buds look like pussywillows all winter long, and bloom in late April. Photo by Henry Homeyer.