8/18/17: In the garden this week

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The perennial border displays its brightest colors in August. Rudbeckia subtomentosa, Agastache foeniculum, and Hibiscus mosceutos vie for attention amid the greenery.

August may be a dull time of year, but not in the garden, when the floral display is at its height. This is the time to sit on the patio with a cold drink and enjoy the fruits of your labor. But while you’re out there, here are a few things you could be doing:

water new plantings: I watered my young trees last Sunday and will do so again this week unless we receive considerably more rain tonight and tomorrow: this morning’s downpour amounted to just over half an inch, and I aim for an inch to an inch and a half per week. Remember that perennials and woody plants that you planted this spring or last fall need supplemental water during dry periods throughout this growing season. The rule of thumb is at least an inch of water per week for newly installed plants. In dry weeks throughout the growing season (weeks with less than an inch of rainfall), you need to water all plants installed this spring or last fall. Trees need supplemental watering even longer: the rule of thumb is one year per inch of trunk diameter. How do you know when we’ve received an inch of rain? You can make a highly sophisticated rain gauge–an old plastic container or tin can placed among the plants. I total the weekly rainfall and decide whether to water my new trees or my clients’ new plantings each week.

— if you intend to plant a second crop of cool-weather vegetables, you should be starting seed. Water the vegetable garden deeply during dry periods, particularly when the weather is hot, and watch carefully for pests and diseases. Removed diseased plants promptly to prevent spread. Continue to remove the flowers from basil plants as they form. And pick those zucchini before they reach the size of baseball bats!

— continue to properly tie, stake, and prune your tomato plants. Most tomato cages are much too small: the plants outgrow them before they start to bear fruit. And unless tomato plants are properly pruned, by pinching out the suckers, they will be so bushy that they’ll be especially susceptible to fungus infections like verticillium wilt. You’ll find general guidelines for growing tomatoes here and specific watering instructions here.

—  do not plant ornamentals like perennials and shrubs until the weather turns cool in fall. During hot weather, plants put their energy into top growth and blooming rather than growing new roots. If you do continue to plant, water very thoroughly and keep an eye on those new plants. They will need extra water during dry periods, as explained above.

it’s also a bad time to fertilize your lawn or to reseed bare patches, no matter what your lawn-care service tells you. Lawn grasses are adapted to much cooler summers than we experience. All they want to do during this time of year is go dormant, so they can’t use any extra nutrients. Here’s a suggestion: don’t feed at all this year. The lawn will look just fine. Or wait until Labor Day and use one application of a slow-release organic fertilizer. Avoid pesticides, fungicides, and herbicides. Pesticides kill butterfly and firefly larvae and native ground-dwelling bees as well as “bad” insects. And garden chemicals are not so great for kids or pets either; common herbicides, in addition to killing butterfly host plants like violets, are carcinogens. Best to avoid them.

— this is a good time to prune woody plants. You want to prune when the plant is relatively quiescent—when it’s not using so much energy growing, flowering, and fruiting that it has little to spare to heal a wound. This quiescent period occurs between now and leaf drop (abscission) in fall. Basically, when you see that the plant has finished fruiting and that it has formed next year’s buds, but the leaf color is not fading yet, you have a window of time for pruning. Of course, you should prune diseased or injured plants at any time as well as remove any safety hazards, such as overeager shrubs that block sidewalks or diseased trees that might fall down.

do not deadhead your perennials. Seeds represent winter food for birds and other creatures and new plants for you. Collect seeds as they ripen, and store them in a cold place (such as an unheated garage) for next year’s planting, or simply scatter them on the ground where you want them to grow. Do deadhead potentially invasive plants like butterfly bush, miscanthus, and pennisetum grasses however.

Enjoy the garden this week!

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Nodding pink onion (Allium cernuum) is not flashy, but it’s nonetheless a star of the August garden. This is a front-of-the-border plant that thrives on full sun and dry soil.

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Rudbeckia triloba has just started blooming. I’m always very happy to see it. The flowers are just so cute.

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8/11/17: In the garden this week

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Some clients resist planting native grasses; resistance usually ends when they see the colors of little bluestem (Schizachyrium scoparium). Look carefully at the blues and purples in this plant, and remember that every plant is slightly different.

We are into what I think of as the summer doldrums, or maybe just a reli=atively q uiet period in the garden. Certainly the prairie perennials continue to bloom with all their might, and there are all the asters to look forward to, but in the ornamental garden there’s not much to do except to keep things tidy (that is, if you like your garden to be tidy).

Still, there’s always something to do in the garden, and here are some suggestions:

water new plantings: unless we get a decent amount of rain this weekend (and forecasts do predict rain), go ahead and water newly planted grasses, shrubs, and woody plants. We received just under an inch of rain so far this week. Remember that perennials and woody plants that you planted this spring or last fall need supplemental water during dry periods throughout this growing season. The rule of thumb is at least an inch of water per week for newly installed plants. In dry weeks throughout the growing season (weeks with less than an inch of rainfall), you need to water all plants installed this spring or last fall. How do you know when we’ve received an inch of rain? You can make a highly sophisticated rain gauge–an old plastic container or tin can placed among the plants. I total the weekly rainfall and decide whether to water my new trees or my clients’ new plantings each week.

— if you intend to plant a second crop of cool-weather vegetables, you should be buying and starting seed. Water the vegetable garden deeply during dry periods, particularly when the weather is hot, and watch carefully for pests and diseases. Removed diseased plants promptly to prevent spread. Continue to remove the flowers from basil plants as they form; you should already have cut down the plants once to make pesto.

— be sure to properly tie, stake, and prune your tomato plants. Most tomato cages are much too small: the plants outgrow them before they start to bear fruit. And unless tomato plants are properly pruned, by pinching out the suckers, they will be so bushy that they’ll be especially susceptible to fungus infections like verticillium wilt. You’ll find general guidelines for growing tomatoes here and specific watering instructions here.

—  It’s too late to plant. Wait until the weather turns cool in fall. During hot weather, plants put their energy into top growth and blooming rather than growing new roots. If you do continue to plant, water very thoroughly and keep an eye on those new plants. They will need extra water during dry periods, as explained above.

it’s a bad time to fertilize your lawn or to reseed bare patches, no matter what your lawn-care service tells you. Lawn grasses are adapted to much cooler summers than we experience. All they want to do during this time of year is go dormant, so they really can’t use any extra nutrients. Here’s a suggestion: don’t feed at all this year. The lawn will look just fine. Or wait until around Labor Day and use one application of a slow-release organic fertilizer. Avoid pesticides, fungicides, and herbicides. Pesticides kill butterfly and firefly larvae and native ground-dwelling bees as well as “bad” insects. And garden chemicals are not so great for kids or pets either; common herbicides, in addition to killing butterfly host plants like violets, are carcinogens. Best to avoid them.

— it’s time to prune woody plants. You want to prune when the plant is relatively quiescent—when it’s not using a great deal of energy growing, flowering, and fruiting that it has little to spare to healing a wound. This will happen between now and leaf drop in fall. Basically, when you see that the plant has finished fruiting and that it has formed next year’s buds, but the leaf color is not fading yet, you have a window of time for pruning. Of course, you should prune diseased or injured plants at any time as well as remove any safety hazards, such as overeager shrub that block sidewalks or diseased trees that might fall down.

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A branch of a large native hazelnut shrub (Corylus americana). It has finished setting fruit as well as forming next spring’s flower buds–the tiny things hanging down from the leaf nodes will become the male flowers. The plant is resting before its last remaining task of the year, leaf abscission, so this is a good time to prune.

do not deadhead your perennials. It will soon be time to collect seeds, which represent winter food for birds and other creatures and new plants for you. Store your seeds in a cold place (such as an unheated garage) for next year’s planting or simply scattered on the ground where you want them to grow. Do deadhead potentially  invasive plants like butterfly bush, however.

Enjoy the garden this week!

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Rudbeckia triloba is in bloom now and will put on a display through September and into October. This is a short-lived perennial that readily self-seeds, so new plant appear each year. It remains a manageable 3 feet tall and doesn’t spread aggressively. And the flowers are adorable!

 

 

7/28/17: In the garden this week

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This plant combinations says “the height of summer” in no uncertain terms. The Rudbeckia will be in bloom until September, but the Vernonia (ironweed) will only last a few weeks.

Who says there are only four seasons? To me, we are transitioning from early summer to what I think of as the height of summer: the brightest-colored flowers are blooming, native fruits are ripening fast, fall bloomers such as asters are showing buds, and some late-summer plants, such as great blue lobelia, are coming into bloom. And of course, tomatoes are beginning to ripen fast in the vegetable garden. Here are some not-too-strenuous garden chores for this hot weather (in addition to weeding, made necessary by a season of normal rainfall, in contrast to the past couple of years of drought.

water new plantings: unless we get a decent amount of rain this weekend (and forecasts do predict rain), go ahead and water newly planted grasses, shrubs, and woody plants. Remember that perennials and woody plants that you planted this spring or last fall need supplemental water during dry periods throughout this growing season. The rule of thumb is at least an inch of water per week for newly installed plants. In dry weeks throughout the growing season (weeks with less than an inch of rainfall), you need to water all plants installed this spring or last fall. How do you know when we’ve received an inch of rain? You can make a highly sophisticated rain gauge–an old plastic container or tin can placed among the plants. I total the weekly rainfall and decide whether to water my new trees or my clients’ new plantings each week.

— all vegetables, including tender crops like tomatoes and peppers and corn, should be planted out by now, and it’s time to remove early greens like lettuce and spinach. In fact, if you intend to plant a second crop of cool-weather vegetables, you should be buying seed. Water deeply during dry periods, particularly when the weather is hot, and watch carefully for pests and diseases. Removed diseased plants promptly to prevent spread. Continue to remove the flowers from basil plants as they form; you should already have cut down the plants to make pesto.

— be sure to properly tie, stake, and prune your tomato plants. Most tomato cages are much too small: the plants outgrow them before they start to bear fruit. And unless tomato plants are properly pruned, by pinching out the suckers, they will be so bushy that they’ll be especially susceptible to fungus infections like verticillium wilt. You’ll find general guidelines for growing tomatoes here and specific watering instructions here.

—  It’s too late to plant. Wait until the weather turns col in fall. Once the weather turns hot, plants put their energy into top growth and blooming rather than growing new roots. If you do continue to plant, water very thoroughly and keep an eye on those new plants. They will need extra water during dry periods, as explained above.

it’s too late to fertilize your lawn or to reseed bare patches, no matter what your lawn-care service tells you. Here’s a suggestion: don’t feed at all this year. The lawn will look just fine. Or wait until around Labor Day and use one application of a slow-release organic fertilizer. Avoid pesticides, fungicides, and herbicides. Pesticides kill butterfly and firefly larvae and native ground-dwelling bees as well as “bad” insects. And garden chemicals are not so great for kids or pets either; common herbicides, in addition to killing butterfly host plants like violets, are carcinogens. Best to avoid them.

— it’s almost time to prune woody plants. You want to prune when the plant is relatively quiescent—when it’s not using a great deal of energy growing, flowering, and fruiting that it has little to spare to healing a wound. This will happen between now and leaf drop in fall. Basically, when you see that the plant has finished fruiting and that it has formed next year’s buds, but the leaf color is not fading yet, you have a window of time for pruning. Of course, you should prune diseased or injured plants at any time as well as remove any safety hazards, such as overeager shrub that block sidewalks or diseased trees that might fall down.

Enjoy the garden this week!

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The first blossoms of Hibiscus moscheutos, rose mallow, opened this week in my garden. This native hibiscus is a short-lived perennial that self seeds readily, produces flowers of different colors, and is very easy to grow.

7/14/17: In the garden this week

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A luxuriant summer border–a bit too luxuriant this year. With all the rain, I have to keep cutting plants back.

Despite all the rain and warm temperatures throughout this growing season, when I look back at photos of past years’ gardens it’s obvious that many things are blooming 10 days to two weeks later than usual. Normally Rudbeckia subtomentosa begins around July 4; right now the first flowers are  opening, as you see in the picture above.

Over 4 inches of rain this week, and still counting! (It’s raining hard as I write this.) If you have a rain garden, or a spot that might become one, it’s probably been dry for the past 3 years, but it’s most likely nice and wet now. I’m seeing more powdery mildew than in recent seasons, and if it keeps raining, ripening tomatoes may crack on the vine. But all the rain is really good for our poor forest and street trees, which have had a thirsty time recently.

When it stops raining, here are some things you might do in the garden this week:

water new plantings: NOT! Rainfall for the week is well over 4 inches, so nothing should need watering. BUT keep monitoring: perennials and woody plants that you planted this spring or last fall need supplemental water during dry periods. The rule of thumb is at least an inch of water per week for newly installed plants. In dry weeks throughout the growing season (weeks with less than an inch of rainfall), you need to water all plants installed this spring or last fall. How do you know when we’ve received an inch of rain? You can make a highly sophisticated rain gauge–an old plastic container or tin can placed among the plants. I total the weekly rainfall and decide whether to water my new trees or my clients’ new plantings each week.

— all vegetables, including tender crops like tomatoes and peppers and corn, should be planted out by now, and it’s time to remove early greens like lettuce and spinach. Water deeply during dry periods, particularly when the weather is hot, and watch carefully for pests and diseases. Removed diseased plants promptly to prevent spread. Remove the flowers from basil plants as they form, and cut down the plants to make pesto as soon as you have enough leaves for a batch.

— be sure to properly tie, stake, and prune your tomato plants. Most tomato cages are much too small: the plants outgrow them before they start to bear fruit. And unless tomato plants are properly pruned, by pinching out the suckers, they will be so bushy that they’ll be especially susceptible to fungus infections like verticillium wilt. You’ll find general guidelines for growing tomatoes here and specific watering instructions here.

—  It’s a bit late to clean up the perennial garden or to divide and replant. Once the weather turns hot, plants put their energy into top growth and blooming. I would no longer move or divide plants, but if you continue to plant, water very thoroughly and keep an eye on those new plants. They will need extra water during dry periods, as explained above.

it’s too late to fertilize your lawn or to reseed bare patches, no matter what your lawn-care service tells you. Here’s a suggestion: don’t feed at all this year. The lawn will look just fine. Or wait until around Labor Day and use one application of a slow-release organic fertilizer. Avoid pesticides, fungicides, and herbicides. Pesticides kill butterfly and firefly larvae and native ground-dwelling bees as well as “bad” insects. And garden chemicals are not so great for kids or pets either; common herbicides, in addition to killing butterfly host plants like violets, are carcinogens. Best to avoid them.

— it’s also a bad time to prune woody plants. The plants are using so much energy growing, flowering, and fruiting that they have little to spare to healing a wound. There will be short window of time later in the summer. Of course, continue to prune diseased or injured plants at any time and to remove any safety hazards, such as overeager shrub that block sidewalks or diseased trees that might fall down.

It’s supposed to stop raining sometime tomorrow! get out and enjoy the garden this week.

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Rudbeckia flowers are enchanting as they open.

6/23/17: In the garden this week

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June is bustin’ out (couldn’t resist) in a perennial bed glorious with yellow sundrops (Oenothera fruticosa), orange butterfly weed (Asclepias tuberosa), and bergamot/beebalm (Monarda fistulosa), plus grasses and numerous species that have finished blooming or not yet bloomed. This border gets full sun and was originally planted over 20 years ago. The soil, which is very sandy, has never been amended in any way.

During the past few years of drought, I had forgotten what a gardening season with normal rainfall looks like. I had forgotten how the plants grow so exuberantly that I have to keep cutting them back along paths, in front of patio chairs, near the air conditioner, how quickly tomato plants grow (more on that below). And what it’s like not to have to exhort clients to keep newly-installed plants well watered until they’re established. It’s a pleasant change.

As I write this, the predicted rain has just started. Can I confess that given a choice between a dry weekend and a good soaking rain, I’d vote for the rain in most cases? But the thing about gardening is that we don’t get a choice.

Here are some things you might consider in your garden this week (after the rain stops, of course):

water new plantings: We received about 1 1/2 inches of rain in the past week, so no watering should be necessary this week. However, you should always water well after planting to settle the new plants in the ground. In dry weeks (those with less than an inch of rainfall), you need to water all plants installed this spring or last fall. How do you know when we’ve received an inch of rain? You can make a highly sophisticated rain gauge–an old plastic container or tin can placed among the plants. I total the weekly rainfall and decide whether to water my new trees or my clients’ new plantings each week.

— all vegetables, including tender crops like tomatoes and peppers and corn, should be planted out by now, and it will soon be time to remove early greens like lettuce and spinach. Water deeply during dry periods, particularly when the weather is hot, and watch carefully for pests and diseases. Removed diseased plants promptly to prevent spread.

— be sure to properly tie, stake and prune your tomato plants. Most tomato cages are pretty useless: the plants outgrow them before they start to bear fruit. And unless tomato plants are properly pruned, by pinching out the suckers, they will be so bushy that they’ll be especially susceptible to fungus infections like verticillium wilt. You’ll find general guidelines for growing tomatoes here and specific watering instructions here.

—  It’s a bit late to clean up the perennial garden or to divide and replant. Once the weather turns hot, plants put their energy into top growth and blooming. I would no longer move or divide plants, but if you continue to plant, water very thoroughly and keep an eye on those new plants. They will need extra water.

it’s too late to fertilize your lawn or to reseed bare patches, no matter what your lawn-care service tells you. Here’s a suggestion: don’t feed at all this year. The lawn will look just fine. Or wait until around Labor Day and use one application of a slow-release organic fertilizer. Avoid pesticides, fungicides, and herbicides. Pesticides kill butterfly and firefly larvae and native ground-dwelling bees as well as “bad” insects. And garden chemicals are not so great for kids or pets either; common herbicides, in addition to killing butterfly host plants like violets, are carcinogens. Best to avoid them.

— it’s also a bad time to prune woody plants. The plants are using so much energy growing, flowering, and fruiting that they have little to spare to healing a wound. There will be short window of time later in the summer. Of course, continue to prune diseased or injured plants at any time and to remove any safety hazards, such as overeager shrub that block sidewalks.

And don’t forget to count the fireflies! The more you see, the healthier and more sustainable your garden is.

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We moved the patio chairs forward to get out of the way of the raspberries. The elderberries (white flowers in background) are especially tall and vigorous this year.

1/6/17: In the Garden this week

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Coralberry (Symphoricarpus orbiculatus) is a jewel of the winter garden.

There’s always something to do in the garden.

water new plantings: in any week in which we receive less than an inch of rain, and the ground is not frozen, water all plants installed this spring or fall. We have received at least an inch of rain per week for the past two weeks, so no need to water right now, but check back here frequently for updates. How do you know when we’ve received an inch of rain? I use a highly sophisticated rain gauge–an old yogurt container placed on the ground among the plants. A tunafish or catfood can works equally well. I total the weekly rainfall and decide whether to water my new trees or my clients’ new plantings this week. This past week we received just over 1 inch of rain.

— are your shrubs overgrown and in need of size reduction? it’s time to start winter pruning of woody plants. Now, while plants are dormant, is the best time to do this: it’s easy to see the structure of the plant while the leaves are down, and the plant is most likely to react favorably while it’s resting. Contact me for coaching if you would like to learn to do this yourself, or for an estimate if you would like me to do it for you.

clean up the vegetable garden carefully: remove the spent plants; compost healthy ones, but throw out infested or diseased plants to prevent the spread of disease. But don’t clean up the perennial garden. It supplies food and cover for birds, butterflies, and other wildlife all winter.

extend a garden bed or start a new one (it’s always a great idea to eliminate some lawn): spread a 3-4” layer of cedar or hemlock bark mulch over the area to kill the grass. Or use a thick layer of leaves (12″ or more). You’ll be able to plant right through the mulch and thatch next spring. You can scatter seeds in the mulch as you collect them.

collect seeds. Even though I’ve been collecting seed since last summer, plenty remains for the birds. I can’t go out the backdoor without disturbing flocks of goldfinches, and the bluejays become quite annoyed with us when we walk to the compost pile. Mixed-species foraging flocks visit daily to take advantage of the bounty; lately I’ve seen kinglets.

— plan for next season: Do it now, because later this winter everything might be covered in snow. Notice things that did great and things that didn’t, make lists of areas you want to improve, areas of lawn you could get rid of, places that are getting sunnier or shadier and need new plantings to suit. Did you have enough fall color in your garden? If not, plant some colorful native shrubs in the spring. Is there plentiful food for birds now? Plan to plant native perennials and shrubs on spring.

There’s always something to do in the garden . . .

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. . . even if it’s just to wait until spring, when bloodroot appears again!

Winter pruning

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To reduce the size of a large shrub and prevent it from overgrowing its site, cut out the largest canes from the bottom. Never cut from the top.

As I explained in this post from three years ago, winter is the time to prune woody plants. In particular, it’s the best time to prune back multi-stemmed shrubs that have overgrown their sites. Contact me for coaching if you’d like to learn to do this yourself (it’s great exercise!) or for an estimate if your shrubs need pruning.