Category: The Gardening Guy

Your plants can be your partners

The recent rains have kept many gardeners from getting outdoors to weed, and weeds have loved the rain and are growing like Boy Scouts on “Free Ice Cream Day” at the Ben & Jerry’s factory. But don’t give up. Weeds also pull well now, with the soft, moist or soggy soil, so get to work!

Recently I spent an hour or so pulling dock (Rumex spp.), a coarse, tall weed that can get to be 5 feet tall or more. There are several species of dock, but all are about the same. And all have deep, fleshy roots that often fork and divide deep in the ground.

I took a garden fork and plunged it into the soil a few inches from each clump of weeds and tipped back the handle to loosen the soil. For the biggest clumps I used the fork in up to four places, once on each side. Then I grasped the clump of strong stems down low and leaned back, allowing all my weight to slowly pull out the weed. And out they came, roots and all. Very satisfying. If I had tried that when the soil was dry, it would have been much more difficult and resulted in broken roots, which would re-sprout the pesky weeds.

I worked on those dock plants now as they had already flowered and had formed seeds, which I don’t want in the soil. If pressed for time, I could have just cut the plants at ground level so the seeds would not be dispersed, but I favored pulling the weeds and getting rid of them once and for all.

Herbalists use dock for various concoctions, not the least of which, I have read, is to prevent “elf sickness.” Not much of that around here, but if you have a problem with it, consult Just Weeds: History, Myths and Uses by Pamela Jones (Chapters Publishing, 1994). It’s an interesting and amusing read.

I’ve been working on most of my flower gardens for at least 40 years and have lots of mature plants. This allows me to brag that in some beds I need not weed at all, or only very occasionally. How is that? The plants are growing so close together that most weeds cannot compete. The weeds are shaded out, or starved for nutrients and moisture by plants with deep roots and thick leaves.

One of those plants good for outcompeting weeds is the ever-present shade-lover, hosta. Although I sometimes plant daffodils between hostas, the daffies bloom and the foliage dies back by the time hostas are fully leafed out. Most common weeds will not compete well with hostas.

Bigroot geranium (Geranium macrorrhizum) is another plant that outcompetes weeds. I use it as a groundcover — the leaves stand 12 inches tall or more, and it blooms with pink, magenta or white flowers in early summer. It works well in dry shade, but will grow in sun or shade. It spreads by root, so plant three plants a foot apart in a triangle and let them fill in the space. Once well-established, it outcompetes most anything.

What else? Sweet woodruff (Galium odoratum) is good for sun or shade and, once established, spreads well. It stands about 8 inches tall and has fragrant white flowers in the spring. It may be a bit too aggressive, though. It can run roughshod over more delicate plants, growing right up to them and stealing moisture and nutrients. This year I plan to weed some out of a dry shade bed where it is diminishing the effectiveness of some primroses.

Dead nettles (Lamium spp.) is another shade to part-shade ground cover and, like the plants above, is non-native here in the United States. It is low-growing with green and silver or white leaves and attractive small flowers that can be pink, white or even yellow, depending on the species. Rarely do I see grasses or weeds coming through plantings of it.

As to full-sun plants there are many that, once established, outcompete weeds. Among those are amsonia, astilbe, black-eyed susans, daylilies, daisies, European wild ginger, Siberian iris, Helenium, phlox, iris and goldenrod. But even these take time to establish themselves. Not only that; you need three or more of each in a planting, and patience.

A perennial plant that will form a clump 2 or 3 feet wide when mature will come in an 8-inch pot. For most plants, it will take three years or more to get to full size. If you plant them 18 inches apart, they will fill in and their leaves touch sooner than if you plant them farther apart. Think of dice with three or five dots. Those are good patterns for planting if you want overlap, much better than planting them in a row.

Weeds will grow almost anywhere, even in your gravel driveway. Cultivated plants need some help to get established. So when you plant, dig a wide hole, say 2 feet wide for an 8-inch potted plant. Put in two or more shovels of compost and stir it up, mixing the native soil with the compost. I always add some organic slow-release fertilizers to the hole, too. That first year water when dry.

Mulch helps young plantings to get established. It helps keep weed seeds from germinating and holds in moisture. You will still have to weed for a few years while getting your flower bed to maturity.

There is no such thing as a weed-free garden. But with time and effort, you can reduce the work considerably once established.

Henry is a lifetime organic gardener living in Cornish, New Hampshire. Reach him at [email protected]. His website is www.Gardening-Guy.com.

Featured photo: Seeds and roots of dock, a big weed. Photo by Henry Homeyer.

Cut them fresh in the morning if you can

I’ve been keeping track this year of what blooms for me, and when. So far I’ve recorded over 100 species of flowers (plus many more named varieties of the same genus) and 40 species of flowering trees and shrubs. Blooming starts with snowdrops in March and will continue on until well after frost in November with witch hazel trees blooming even after leaf drop.

I grow so many flowers because they give me pleasure to look at them. And even though I spend a lot of time in the garden, I spend more time indoors than out, so I cut stems of annuals, perennials and flowering woodies and arrange them in vases. I want flowers on the kitchen counter, the dining room table, the desk I write at, in the bedroom, in the bathroom — in fact, on every flat surface in the house.

Let’s look at some basics of preparing and arranging flowers. When is the best time to pick flowers? Pick in the cool of the morning, especially if the day will be hot. The stems are full of water and carbohydrates and should feel full, not limp. Bring along a clean container so that as you wander around picking flowers their stems are well-submerged. Instead of picking flowers just before dinner with company, try to pick them before going to work in the morning.

Flowers with multiple blossoms on a stem (delphinium, foxglove, for example) should have some blossoms in full bloom, others showing color and some in tight bud. This will prolong the show. Flowers that grow on individual stems should be in full bloom, or just starting to open. Peonies, for example, will often have tight buds on the same stem as an open blossom, but it is rare for them to bloom in the vase. Daylilies only bloom for a day, but a single scape can have up to 10 buds that will bloom in sequence for a week or more.

It’s best to let your freshly cut flowers stay in the bucket of water for an hour before you arrange them. Cut the stems on a 45-degree angle using floral shears, or your bypass pruners if they are sharp. Scissors made for cutting paper are not good for flowers, so you may want to buy a dedicated pair of floral shears.

Because of capillary action, water in hollow stems will be sucked up the stem a little as soon as you cut them. So you need to recut about ¾ of an inch of each stem and place it in a vase right away. Otherwise an air bubble may inhibit water take-up.

Be sure to remove all leaves or flowers that would be submersed in the vase you are using. Why? The leaves will rot and ferment; the bacteria will inhibit water uptake.

Florists selling fancy roses or other expensive flowers generally provide a packet of “flower preservative.” But you can buy that stuff or make your own for your homegrown flowers. In a quart of water add a teaspoon of sugar, a teaspoon of household bleach and 2 teaspoons of lemon or lime juice. I learned long ago to drop a couple of copper pennies in a vase with a bunch of tulips to help keep the buds closed longer and have seen it work. Failing that, just change the water every two or three days, and trim off a little of each stem.

The height of the vase is important. I’ve read “expert” advice recommending different ratios for the height of the vase to the length of the flowers ranging from flowers being 1.5 times the vase height, up to three times the vase height.

To my eye, a 6-inch vase will look good with 9-to-12-inch flowers in it, but even 18-inch stems may look fine, especially if you place shorter flowers around the outside perimeter of the arrangement. I made an arrangement recently with six stems of beebalm in an 8-inch vase. I angled the stems to create support for a 24-inch stem of delphinium in the middle, standing straight up. That looked great to me.

There are devices called frogs that can be placed in a bowl or big vase to hold flowers in place. They consist of a piece of heavy metal with sharp, upward-pointing pins that allow you to stab the flower stems and hold them in place. Glass frogs also exist that have divots in a chunk of glass where a stem can be lodged.

What is blooming now that will look good in a vase? I love delphinium, astilbe, daylilies, roses, bee balm, phlox and Shasta daisies. All will last well in a vase, and provide plenty of height for a tall vase.

We just finished the peony season with the Itoh peonies lasting well past normal herbaceous peonies. They are the result of crossing tree peonies with regular peonies. Mine, called Garden Treasure, produced 30 or more 5-inch-diameter blossoms that last very well in a vase.

Arranging flowers is an art form we can all enjoy. You don’t need training or expertise. Just pick what you like, and arrange them in a vase, or even in a tall water glass. Give flowers to an aging uncle or a friend with a sprained knee. Everyone loves the gift of flowers. And be sure to put some on your dinner table tonight.

Henry is the author of four gardening books and is a gardening consultant. Reach him at [email protected].

Featured photo: Flower arrangements are easy to make and pleasing to the eye. Photo by Henry Homeyer.

Have you thinned your root crops yet?

For me, July has started off wet: rains, heavy at times, three days a week and going on for weeks. Although I like not having to water my new plantings in the vegetable garden and flower beds, some plants are having a tough time — they need sunshine!

It’s fortunate that I make raised beds in my vegetable garden, which is near our stream. Hoeing up the earth from the pathways and adding compost has helped me considerably. Even though the beds are only 6 inches above the walkways, it helps to drain soggy soil. Of course it’s too late to do that if you have already planted on the flat of the garden — but remember for next year, as we may see these conditions again.

If you haven’t thinned your carrots, beets and other root crops yet, now is the time to do so. I try to get that done by July 4, but later is OK. You can thin to 1 inch if you want to thin them again to 2 inches in a few weeks, or you can just thin to 2-inch spacing now. The advantage to thinning twice is that your carrots will be big enough to eat when you thin them the second time.

Carrots are heavy feeders, so you may want to side-dress the rows with a little slow-release organic fertilizer like Pro-Gro or Espoma Garden Tone. Just sprinkle a thin line of fertilizer alongside the carrots, and then use a hand tool to work it in a little.

I recently finished mulching my pathways and around bigger plants like tomatoes. I put down a layer of newspaper, four sheets or more, and cover it with straw. This does a good job of keeping down the weeds. Hay is cheaper, of course, but has seeds, which can grow.

For onions, carrots and other things planted close together in straight rows I tear strips of newspapers and cover them with grass clippings or, better still, chopped leaves from last fall. FYI: Newspapers rip well from top to bottom, but not across the page.

I did lots of staking of peonies in June, as many of them have such heavy blossoms that they bend over and land on the ground, particularly after a rain. Tall fall asters and goldenrod and even phlox will fall over later on as they get too tall to stand up to rains and wind.

I have lots of 4-foot and 5-foot quarter-inch-diameter iron rods I had custom-made for me for holding up these fall beauties. The iron rods go deep into the soil more easily than thin bamboo stakes, and are stronger. To avoid getting poked in the eye when bending over, I put a wine cork on the top of each one. I drill a quarter-inch hole into the cork and slide it on. They are a good excuse to buy a nice bottle or French red from time to time with a real cork!

It’s getting late in the season to cut back tall flowers to keep them shorter, but you might try cutting back some phlox or asters now if they haven’t started making flower buds yet. Traditionally this is called the “Chelsea Chop” and is named after the Chelsea Flower Show in London, which occurs in late May each year. After the Chelsea show English gardeners prune back big tall plants. They bloom later, are shorter, and often have many more blossoms. Good candidates for hard pruning include asters, Boltonia, purple coneflower, Joe Pye weed, sneezeweed (Helenium), bee balm, Russian sage, phlox, obedient plant, rudbeckias of all sorts and Culver’s root.

Not all flowers respond well to the Chelsea Chop. Do not do this with lady’s mantle, columbine, goat’s beard, astilbe, delphinium, gas plant (dictamus), foxglove, geraniums, daylilies, hostas, iris, lupines or oriental poppies, among others. You can find lists of which to cut and which to leave alone in Tracy DiSabato-Aust’s fine book The Well-Tended Perennial Garden. Everyone should have a copy of it.

Weeding flower beds is loved by a few gardeners but avoided by many. I am so lucky that both my wife Cindy and I like to weed. Cindy is a formidable weeder, even better than me, and she has much more endurance than I do. If you don’t enjoy weeding, set a goal: Work for half an hour. Work until this small bed is weed-free. Weed every morning or evening for 15 minutes. Small efforts done every day really make a huge difference.

My advice? Get a good weeding tool that you like, one that will get under the roots so that you can lift from below and pull from above. For us, that is the CobraHead weeder (www.CobraHead.com). It’s made like a curved finger with just a single tine. I can tease out roots that, if broken, would re-sprout. It’s important to get the entire root system out so you don’t have to pull the same weed over and over.

We use ground fall leaves in the flower beds, or, lacking enough, we buy double-ground bark mulch. But be careful: If you use too much, you can starve your plants of water from light rains. An inch and a half is what I strive for. Anything less than an inch looks good but won’t do much to deter weeds. And if there are roots from things like goutweed or Japanese knotweed, no amount of mulch will deter those culprits.

Henry is a lifelong organic gardener and a 20-year veteran of the UNH Master Gardener program. He is the author of four gardening books and a gardening consultant. Reach him at [email protected].

Featured photo: Wine corks placed ontips of iron rods protect me against a poke in the eye when bending over to sniff the peonies Photo by Henry Homeyer.

Tomato hornworms are the worst

All gardeners have to contend with a variety of insects and other small pests in the garden, those that attack our plants and those that bite us.

I’ve tried every kind of spray to repel ticks and prevent bites. I haven’t found any that are 100 percent effective. There are lots of “all natural” ones out there, but it is hard to tell how effective they are. I don’t like sprays with DEET in them, but believe they probably are better at repelling ticks than the herbal applications. But I don’t rely just on repellents.

When I am working in brushy areas I wear long pants: lightweight quick-dry nylon. Then I either tuck the pants into my socks or wear some special tick gaiters. The ones I use are called Lymeez. According to their advertising, they are a mesh treated with EPA-registered micro-encapsulated permethrin tick repellent and closed with Velcro. LL Bean and other suppliers also sell clothing treated with permethrin to kill or repel ticks, mosquitoes and other insects.

Slugs and shell-covered small snails are always a problem in my garden. I usually keep a jar of soapy water in the garden near my lettuce, which is the preferred treat for these nasty critters. Pick and drown works.

Another garden pest is the Colorado potato beetle. This striped beetle can decimate the leaves of potatoes if you don’t control them early, even killing the plant or reducing your crop. The beetles are yellowish with black stripes, the larvae are beige to red with rows of black dots. The eggs are orange and generally found on the underneath side of the leaves. It is important to pick these pests early as they mature quickly and each female lays many eggs, multiplying their impact quickly if not controlled.

If you have too many potato plants to hand pick them all, there is a biological control called Bt. It is a bacterium that is diluted in water and sprayed on the plants. It is not a contact poison, it needs to be consumed by the larvae when they are young. They sicken, stop eating and die. But you may need to use it for a few years to really solve the problem. There are several different Bt formulas, so be sure you get one labeled for potatoes.

Striped cucumber beetles look a bit like potato beetles, but they are smaller and fast-moving. They can strip all the leaves off your vine crops in a single night if they are present in the soil when your cukes or squash-family plants first germinate. You can cover the crops with row covers to keep them away, but they may already be present in the soil. Me? I start my vine crops indoors and only plant them when they have at least a 6-inch-long vine and can’t be killed by the beetles.

My least favorite pest is the tomato hornworm. Big, up to 4 inches long, they are aggressive when you pick them up. There is a natural predator, a parasitic wasp that lays eggs in them. So if you see what looks like grains of rice on them, just remove them to a faraway part of the garden. Those “grains of rice” are larvae that will suck them dry and keep them from reproducing. You can make or buy houses for these wasps and other good wasps and hang it on your shed. These are simply a collection of hollow bamboo pieces they can use for shelter.

A good reason not to use insecticides is that they will inadvertently kill good bugs like lady beetles, spiders, praying mantises and more. You’ve probably never seen an assassin bug, but they are relentless killers of bad bugs, sucking them dry.

Mother Nature tries to create a balance that keeps pests from taking over. Unless you know an insect is a pest — think Japanese beetle, rose chafer, striped cucumber beetle — leave it be. It might be the critter that controls others from decimating your garden.

Henry is a lifelong organic gardener and a 20-year veteran of the UNH Master Gardener program. He is the author of four gardening books and a gardening consultant. Reach him at [email protected].

Featured photo: Wasp house. Photo by Henry Homeyer.

Stop and smell the daphne, peonies and viburnum

Do you remember your Grammy’s favorite rose? If you do, you probably remember how fragrant it was. One of my grandmother’s favorite plants was the peony named ‘Festiva Maxima.’ It is a double white with a drop of red in the middle. It’s in bloom now, with a fragrance so pleasant it almost makes me swoon. And even though she passed away in 1953, her peony has been divided and shared, and I have a piece of it, which I treasure.

My friend Nelia Sargent of Claremont, New Hampshire, is an excellent gardener, growing trees, shrubs, perennials and annuals. She specializes in plants with fragrant flowers because she has been blind since she lost her sight while in college decades ago. I called her recently to see what flowers please her the most in spring, summer and fall. Let’s take a look.

Spring: Early each spring one of Nelia’s first bloomers is a witch hazel named ‘Arnold’s Promise.’ Even though it is a Zone 5 plant (hardy to minus 20 degrees) and we are in a Zone 4 area, her home is within a mile of the Connecticut River, which tempers winters a bit. Arnold’s Promise blooms for her in April and, she said, one stem will fill a room with fragrance for up to two weeks in a vase.

Another favorite of hers is February daphne (Daphne mezereum), which blooms here in late March into April. It is a small shrub that is relatively slow-growing and short-lived. She says they are good for 10 years, but I’ve had one for 20. It is very fragrant and has lovely lavender flowers. All daphnes are fragrant and she also likes Daphne burkwoodii, which blooms in May.

Viburnums are also fragrant shrubs grown by Nelia. She particularly likes Viburnum judii and V. carlessii. The first, also called Judd’s viburnum, has semi-snowball bloom clusters that are pink in bud and white when open. It grows in full sun or part shade, as does Korean spice viburnum (V. carlessii). Both prefer well-drained rich soil in sun and stay a tidy 6- to 8-foot height and width. I grow the second and have had mixed luck with it: It is not always very generous with its blossoms, and does develop dead branches at maturity.

Summer: This is the season that has the most kinds of fragrant blossoms. Nelia has developed such a keen sense of smell that she was once invited to “smell test” and rate the lilacs at the Arnold Arboretum at Harvard.

Nelia told me that there are about 20 different fragrances from lilacs, each distinct. Her favorite lilacs are called ‘Sister Justina,’ ‘Gertrude Lesley’ and ‘Miss Kim.’ Miss Kim is often sold as a miniature, but it is really just slow-growing. Mine, now 25 years old, is about 12 feet tall and wide. The fragrance is lovely — I can smell it from 20 feet away, and on a sunny day it is loaded with butterflies and bees.

Then there are peonies. Properly planted, peonies last forever. And, as Nelia said, ”You can plant peonies for your heirs, but they yield immediately.” Purchase your peonies now, while in bloom at the garden center so you can see if they are fragrant — not all are — and see what they look like. Just don’t plant them so deep that their nibs or growing points are covered with more than an inch of soil, or they will not bloom in the future.

Nelia’s favorite peonies are Dawn Glow, Madame Deveronvale, Edulalis Superba (a very early deep pink), Festiva Maxima, Duchesse De Nemours and Carnation Bouquet (spicy, with a “carnation appearance”).

Mock orange (Philadelphus spp.) is a group of shrubs composed of about 20 species that are very fragrant. But they are a bit unruly and not suited for prime real estate in the garden. Nelia suggests planting them a bit away from the house and letting them naturalize. I’ve never grown it myself due to its spreading behavior.

Late summer and fall: Many fall flowers are big, tall, bright — but not very fragrant. Here are a few she likes.

Clethra: A nice shrub that likes moist places. She particularly likes ‘Ruby Spice,’ which is a reddish one.

Cohosh (formerly Cimicifuga spp., now included in the genus Actea): This plant has tall flower spikes that display drooping bottlebrush flowers. Bees absolutely love it. There is a black-leafed species that is quite distinctive called Hillside Black Beauty.

Seven Sons-Flower Tree (Heptacodium miconioides) starts blooming in September and may continue into October unless there is a bad frost. The blossoms are small and white and delicately fragrant. I grow it for the bark as well, which is exfoliating and interesting all winter.

So, if you like fragrant flowers, try some of Nelia Sargent’s favorites. All are wonderful.

Henry is the author of four gardening books and is a gardening consultant. He lives and gardens in Cornish Flat, N.H. Reach him at [email protected].

Featured photo: Close-up of February Daphne taken in late March. Photo by Henry Homeyer.

You don’t need a van, just a wheelbarrow

Once, a long time ago, I was sitting on a porch overlooking a landscape with an acquaintance. I commented that if she removed or thinned a line of tall pine trees, she would have a lovely long view.

“Great idea! I’ll have them moved,” she said. Even though she was a woman of means, I explained that it wouldn’t be possible to move 60-foot white pines. She should either live with them or cut some down.

On the other hand, I move shrubs and perennial flowers regularly. When it’s done right, a plant barely knows it’s been moved. I have a number of reasons for moving a plant.

First, if the plant is not growing well. Perhaps the tag on it said, “sun or part shade.” Well, what is part shade? I define full sun as five or six hours of afternoon sun. Morning sun is less hot, and a sun-lover might want some afternoon sun in addition to the morning sun.

Why else move a plant? We all change our minds. Or plants grow and start to crowd out their neighbors. We get new plants and decide to plant one where something else is already growing. Moving plants is a normal part of gardening.

I have a lovely shrub called Carolina sweetshrub or Calycanthus floridus. My reference book by Michael Dirr, Manual of Woody Landscape Plants, suggests planting it in sun or shade in deep moist loam. I planted it in full sun in deep, moist loam and the leaves burned that first summer. I assumed it had been grown in a shady place at the nursery, so figured it would be fine in Year 2. It was not. Its leaves burned again. So that fall I moved it to a shady spot.

For the next three years or more my sweetshrub did not burn up in summer, but neither did it flower much. I wanted those deep burgundy wine-colored blossoms, each more than an inch across. So I finally moved it again, this time under a pear tree that allowed filtered sunshine. Perfect! It has bloomed magnificently ever since.

My technique for moving a shrub is simple. I decide where it should go, and get the area ready by removing grass or plants and loosening the top layers of soil. Then I go to the plant in question with a drain spade that has a blade 16 inches long and only 5 inches wide. I slide it under the shrub on all four sides by thrusting the blade into the soil at a 45-degree angle. On each side I give the spade a gentle downward push to lift and loosen the shrub a little. By the fourth thrust it should be ready to lift out by sliding my two hands under the root ball.

I move the shrub into a waiting wheelbarrow and bring it to its new home. I measure the depth of the root ball and dig out a hole deep enough so that it will sit at the same depth it was at originally. I dig a wide hole so that the area around the shrub will be nicely loosened and ready for roots to grow in it once I backfill the hole. I water well that day and regularly all summer.

When I water a plant I have moved, I add something to the water: a capful (half a teaspoon) of something called “Superthrive” in a watering can of water. It was developed some 70 years ago and uses seaweed extracts and plant hormones to lessen transplant shock. I find it really helps. A small blurt of Neptune’s Harvest Fish and Seaweed fertilizer in the water adds some quick nutrition. I use both liquids on all my vegetables as I plant them, too.

Any plant that you planted this year can be moved now without damaging it. It takes several weeks before roots move far from their root ball. I don’t bother with a spade when moving new things. I use my CobraHead weeder, which is shaped like a long curved finger. It gets under the root ball easily, and by wiggling it around I can loosen the plant and gently lift it out, pulling from below with my CobraHead.

When I am moving an established perennial, I am more careful. Over the years, from experience and readings, I have learned much about the root systems of common perennials. You probably have, too. Some have roots near the surface while others are more like tubers that go deep.

Peony roots go deep and are not easy to move without breaking their fleshy tubers. Peony experts say to move them in the fall, when they are going dormant. But I once moved a hedge of peonies in June with about 50 plants, and not one showed ill effects.

It is best to move established perennials in the early evening, or on a cool or drizzly day. Some plants go into shock if disturbed in the heat of the day, so avoid doing so if you can. Others, like daylilies, don’t care at all about being moved on a hot dry day.

I recently was planting my front walkway garden and noticed a rudbeckia called ‘Prairie Sun’ that was too close to another plant, so I moved it at 11 a.m. on a hot day. After lunch the leaves were limp and it was in distress. My solution? I gave it another drink of Superthrive and placed an umbrella over it to provide shade. By the next morning it looked like it had never been moved!

So go ahead, move plants. Other than big trees, there are very few you can’t move.

Featured photo: Calycanthus or sweetshrub is a shade-loving shrub that I moved twice to find it a happy home. Photo by Henry Homeyer.