5/14/17: In the garden this week

Flower cluster of grey dogwood (Cornus racemosa), the loveliest dogwood of all.

Flower cluster of grey dogwood (Cornus racemosa), the loveliest dogwood of all. This plant will bloom within the next week or 10 days.

These next couple of weeks are the loveliest of the year in the garden, and we will miss it all—we are going on vacation. So I thought that in this post I would look ahead a bit and tell you what to expect in the next two or three weeks. In that time, the garden will switch from spring to summer.

It’s delightful that the drought of the past two years seems to have lifted. Rainfall is slightly above average for the past 30 days and normal for the year to date. As a result, we are enjoying a truly lovely spring. And the relatively cool temperatures mean that all the beauty around is lasts a bit longer than it would if the weather suddenly turned hot. It gives us all a longer spring planting season as well. I like to stop planting when the weather really warms up.

So here are some things you could be doing in your garden over the next few weeks:

water new plantings if the weather turns dry: Rainfall totals are finally normal or even a bit above, at least in the short term. We’ve received approximately an inch and a half of rain this weekend, so no need to water. But always water well after planting to settle the new plants in the ground, and check back here weekly for updates: In any week in which we receive less than an inch of rain, 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.

plant trees and other woody plants. Don’t wait too long—the earlier you plant, the more time trees and shrubs will have to establish before the weather really heats up. Same goes for perennials and grasses. The earlier the better. If you must keep planting once the weather really turns hot, be sure to water copiously.

provide prophylactic care for trees. Several native tree species are at great risk of succumbing to invasive insect infestations. Hemlocks should be sprayed with dormant oil (which is not a pesticide) in early spring and early fall. Ash trees should be treated for emerald ash borer. The best time is while they are leafing out, so it’s a bit late. Consult a qualified arborist if you’re not sure if you have hemlocks or ashes; he or she can then recommend the best treatment options.

— continue to start vegetable seeds indoors. You’ll find a schedule here. Get the vegetable garden ready for the coming season by weeding, raking the soil smooth, and adding compost or well-rotted manure. Compost can simply be spread on top of the soil; manure should be mixed in, and make sure it’s not fresh manure. Once the soil is prepared, you can plant seeds of cool-weather crops such as mesclun, spinach, arugula, peas, and beets in the garden. Do not set out warm weather crops like tomatoes, squash, basil, and eggplant until the last week in May. Right now the nights are still too cool, and the plants will not grow properly.

—  After cleaning up the perennial garden, continue to plant perennials and to divide and move them as they emerge. The earlier you divide or move perennials and grasses, the quicker they will establish. Even finicky, hard-to-divide plants will respond well. And it’s much easier to divide and replant a few plants at a time than to dig up an entire bed. IF the weather turns hot, either stop planting or increase the amount of water you provide.

the cool weather is a great time to reseed bare patches of lawn, but be sure to keep the seeded areas moist until the seed sprouts. It’s too early to feed your lawn, no matter what your lawn-care service tells you. Wait until Memorial Day, and then use a slow-release organic fertilizer. Or best of all, don’t feed at all this year. The lawn will look just fine. Avoid pesticides, fungicides, and herbicides. Remember that 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.

— Support a local farmer by joining a CSA (community supported agriculture) this season. CSAs allow you to support small-scale, sustainable agriculture and help limit the environmental effects of factory farming. You’ll also find that the produce tastes much, much better than what you buy in the supermarket. For the past 5 years or more, we have joined Hesperides Organica, a family-run farm located in Hawthorne, NY. They deliver weekly to various locations in Bergen County.

I hope you’re enjoying this lovely, slow-to-emerge spring as much as I am. It’s very hard to tear myself away from the garden.

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Canada anemone, Anemone canadensis, is a lovely ground cover, but it can be a bit of a thug in the garden. Be sure to plant it where you can contain it.

5/5/17: In the garden this week

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Chokeberry (this is black chokeberry, Aronia melanocarpa) is in full bloom now. In August, it will produce large black berries for birds (and jam); in fall, the foliage will be brilliant orange and red.

Planting season is in full swing, and I am grateful for this very rainy day. The ground was getting too dry to plant without watering first, and I’m in the middle of a very busy planting season. I like to finish planting perennials, grasses, and shrubs before Memorial Day, although you can plant later if you can water frequently. Roots grow best when the soil is cool.

You’re probably thinking about preparing your yard for outdoor living: setting up the patio and grill, uncovering the pool, planting ornamentals. Give some thought to sustainability as well as to livability. Consider planting native perennials instead of annuals (less watering, less work every spring); using fewer chemicals on the lawn (less expensive, kinder to the environment); welcoming pollinators and birds (planting natives, avoiding pesticides). Maybe there are some areas of lawn that could be replanted as flowers or vegetables. Maybe you can water less often this season.

In addition, here are some seasonal gardening tasks you might do this week:

water new plantings: Rainfall totals are finally normal or even a bit above, at least in the short term. We’ve received approximately an inch and a half of rain today so far, so no need to water. But always water well after planting to settle the new plants in the ground, and check back here weekly for updates: In any week in which we receive less than an inch of rain, 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.

plant trees and other woody plants. Don’t wait too long—the earlier you plant, the more time trees and shrubs will have to establish before the weather really heats up. Same goes for perennials and grasses. The earlier the better.

provide prophylactic care for trees. Several native tree species are at great risk of succumbing to invasive insect infestations. Hemlocks should be sprayed with dormant oil (which is not a pesticide) in early spring and early fall. Ash trees should be treated for emerald ash borer. Consult a qualified arborist if you’re not sure if you have hemlocks or ashes; he or she can then recommend the best treatment options.

— continue to start vegetable seeds indoors. You’ll find a schedule here. Get the vegetable garden ready for the coming season by weeding, raking the soil smooth, and adding compost or well-rotted manure. Compost can simply be spread on top of the soil; manure should be mixed in, and make sure it’s not fresh manure. Once the soil is prepared, you can plant seeds of cool-weather crops such as mesclun, spinach, arugula, peas, and beets in the garden. Do not set out warm weather crops like tomatoes and eggplant for another few weeks.

—  After cleaning up the perennial garden, continue to plant perennials and to divide and move them as they emerge. The earlier you divide or move perennials and grasses, the quicker they will establish. Even finicky, hard-to-divide plants will respond well. And it’s much easier to divide and replant a few plants at a time than to dig up an entire bed.

it’s much too early to feed your lawn, no matter what your lawn-care service tells you. Wait until Memorial Day, and then use a slow-release organic fertilizer. Or best of all, don’t feed at all this year. The lawn will look just fine. Remember that 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 are carcinogens. Best to avoid them.

— Support a local farmer by joining a CSA (community supported agriculture) this season. CSAs allow you to support small-scale, sustainable agriculture and help limit the environmental effects of factory farming. You’ll also find that the produce tastes much, much better than what you buy in the supermarket. For the past 5 years or more, we have joined Hesperides Organica, a family-run farm located in Hawthorne, NY. They deliver weekly to various locations in Bergen County.

Enjoy the garden this week.

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Lovely foamflower (Tiarella cordifolia) is in full bloom now in my garden.

 

4/28/17: In the garden this week

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Early spring ephemerals are subtle, like this Solomon’s seal (Polygonatum biflorum). The showier variegated species that’s more often found in garden centers is NOT native.

At this time of year I can either work in the garden or write about the garden, and most of the time I choose the former. But I want to briefly keep you up-to-date on seasonal developments:

water new plantings: Rainfall totals are finally normal or even a bit above, at least in the short term. We received approximately an inch and a half of rain this week, so no need to water. But be sure to water well after planting to settle the new plants in the ground, and check back here weekly for updates: In any week in which we receive less than an inch of rain, 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.

plant trees and other woody plants. Don’t wait too long—plants grow roots when the soil is cool, so the earlier you plant, the more time trees and shrubs will have to establish before the weather really heats up.

provide prophylactic care for trees. Several native tree species are at great risk of succumbing to invasive insect infestations. Hemlocks should be sprayed with dormant oil (which is not a pesticide) in early spring and early fall. Ash trees should be treated for emerald ash borer. Consult a qualified arborist if you’re not sure if you have hemlocks or ashes; he or she can them recommend the best treatment options.

— continue to start vegetable seeds indoors. You’ll find a schedule here. Get the vegetable garden ready for the coming season by weeding, raking the soil smooth, and adding compost or well-rotted manure. Compost can simply be spread on top of the soil; manure should be mixed in, and make sure it’s not fresh manure. Once the soil is prepared, you can plant seeds of cool-weather crops such as mesclun, spinach, arugula, peas, and beets in the garden. Do not set out warm weather crops like tomatoes and squash for another few weeks.

—  After cleaning up the perennial garden, continue to plant perennials and to divide and move them as they emerge. The earlier you divide or move perennials and grasses, the quicker they will establish. Even finicky, hard-to-divide plants will respond well. And it’s much easier to divide and replant a few plants at a time than to dig up an entire bed.

it’s much too early to feed your lawn, no matter what your lawn-care service tells you. Wait until Memorial Day, and then use a slow-release organic fertilizer. Or best of all, don’t feed at all this year. The lawn will look just fine. Remember that 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 are carcinogens. Best to avoid them.

— Support a local farmer by joining a CSA (community supported agriculture) this season. CSAs allow you to support small-scale, sustainable agriculture and help limit the environmental effects of factory farming. You’ll also find that the produce tastes much, much better than what you buy in the supermarket. For the past 5 years or more, we have joined Hesperides Organica, a family-run farm located in Hawthorne, NY. They deliver weekly to various locations in Bergen County.

Plant something for the butterflies this week! You’ll reap the benefits all summer long!

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Tiarella is the star of the late-April shade garden. Ferns are emerging, and columbine and geraniums will open their first flowers in the coming week.

 

4/21/17: In the garden this week

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Violets are not weeds! They’re an extremely important larval food source for a large group of butterflies. No violets, no fritillaries. And they’re lovely as well.

After a bizarre start, with the late snowstorm in mid-March, spring is unfolding in a normal and reassuring way (although for those of us who remember when lilacs bloomed reliably for Mother’s Day, everything is still insanely early). Violets are blooming, most native trees are beginning to leaf out, early bloomers like spicebush and native plums have finished blooming, flowering dogwood (which used to bloom around Memorial Day) is almost at its peak. None of my native shrubs were affected by the late frost, although many exotics, such as the early-flowering Asian magnolias, bloomed sparsely if at all.

In the understory, bloodroot is in bloom right now, as are Virginia bluebells. Columbine is showing buds, Solomon’s seal is raising its delicate head above the leaf litter, and native geraniums are showing buds. Most summer-blooming perennials are up, with the exception of milkweeds and wild petunia, which always come late to the party. They must feel the need to make an entrance.

There’s a lot to do in the garden this week and throughout the spring:

water new plantings: Although the past two weeks have been dry, we received an inch of water last night, so no need to water this week. But check back here weekly for updates: In any week in which we receive less than an inch of rain, 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.

plant trees and other woody plants. Don’t wait too long—plants grow roots when the soil is cool, so the earlier you plant, the more time trees and shrubs will have to establish before the weather really heats up.

provide prophylactic care for trees. Several native tree species are at great risk of succumbing to invasive insect infestations. Hemlocks should be sprayed with dormant oil (which is not a pesticide) in early spring and early fall. Ash trees are subject to emerald ash borer. Consult a qualified arborist if you’re not sure if you have hemlocks or ashes; he or she can them recommend the best treatment options.

— continue to start vegetable seeds indoors. You’ll find a schedule here. Get the vegetable garden ready for the coming season by weeding, raking the soil smooth, and adding compost or well-rotted manure. Compost can simply be spread on top of the soil; manure should be mixed in, and make sure it’s not fresh manure. Once the soil is prepared, you can plant seeds of cool-weather crops such as mesclun, spinach, arugula, peas, and beets in the garden. Do not set out warm weather crops like tomatoes and squash for another few weeks.

Clean up the perennial garden. It’s finally time! Compost as much as the detritus as you can, and treat it gently: it contains the pupae and larvae of valuable insects, bees, and butterflies. And leave a little on the ground for birds to use as nesting material. As I glance out the window, a robin is collecting bits of grass and stalks I left behind.

—Divide perennials as they emerge. The earlier you divide or move perennials and grasses, the quicker they will establish. Even finicky, hard-to-divide plants will respond well. And it’s much easier to divide and replant a few plants at a time than to dig up an entire bed.

it’s much too early to feed your lawn, no matter what your lawn-care service tells you. Wait until Memorial Day, and then use a slow-release organic fertilizer. Or best of all, don’t feed at all this year. The lawn will look just fine. And remember, 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 are carcinogens. Best to avoid them.

— Support a local farmer by joining a CSA (community supported agriculture) this season. CSAs allow you to support small-scale, sustainable agriculture and help limit the environmental effects of factory farming. You’ll also find that the produce tastes much, much better than what you buy in the supermarket. For the past 5 years or more, we have joined Hesperides Organica, a family-run farm located in Hawthorne, NY. They deliver weekly to various locations in Bergen County.

Enjoy the garden this week–the weather and the soil moisture will be perfect!

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The delicate flowers of native plum, Prunus americana, are intensely fragrant and as lovely as any exotic cherry can produce.

 

3/31/17: In the garden this week

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Soon: if you sow seeds this week, you can expect to eat tender young greens within a month.

Finally, a good soaking rain! An inch earlier in the week, and now the rain gauge is showing another inch since last night. The total for the last 365 days has risen to close to 90 percent of normal, whereas it’s been hovering between 15 and 20 percent below normal for more than a year. I am hopeful that the drought of the past two years is over.

Once the rain stops, it will be time to plant cold-tolerant crops in the vegetable garden (see below) and to get out into the woods to look for signs of spring. Skunk cabbage is well up, its bright green leaves half unfurled; pussy willow is in full bloom; many spring blooming plants are emerging.

Here are some more garden tasks for the coming week:

water new plantings: April Fool! We’ve had two inches of rain this week so far, so no need to water, but check back here weekly for updates. In any week in which we receive less than an inch of rain, 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 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 each week.

— continue to start vegetable seeds indoors. You’ll find a schedule here. Get the vegetable garden ready for the coming season by raking the soil smooth and adding compost or well-rotted manure (compost can simply be spread on top of the soil; manure should be mixed in). And plant seeds of cool-weather crops such as mesclun, spinach, arugula, peas, and beets in the garden.

— Don’t clean up the perennial garden yet. It supplies food and cover for birds, butterflies, and other wildlife all winter. Wait another few weeks, even a month, until most plants are in active growth. There is one exception to this rule: if your garden, like mine, is covered with leaves of Norway maple trees, which form a solid barrier to new growth, remove those leaves gently. I uncovered my shade gardens this week and found that asters, columbine, Virginia waterleaf, and many other native shade plants were putting out new growth.

but do collect seeds. Even though I’ve been collecting seed since last summer, plenty remains for the birds. Through the winter I saw nuthatches, chickadees, titmice, juncos, several species of sparrows, woodpeckers, kinglets. Now the robins are back, and year-round residents like chickadees and cardinals are very active. Be sure to elave them some seed.

— plan for the coming season: 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? If not, plant a variety of native grasses, perennials, and shrubs. And place your orders early, meaning now, because native plant nurseries run out of the most popular species.

it’s much too early to feed your lawn, no matter what your lawn-care service tells you. The grass plants can’t possibly use all that nitrogen while the weather is so cool, so it just runs off into our streams and ponds. Wait until Memorial Day, and then use a slow-release organic fertilizer. Or best of all, don’t feed at all this year. The lawn will look just fine. And remember, pesticides kill butterfly and firefly larvae and native ground-dwelling bees as well as “bad” insects. And they’re not so great for kids or pets either. Best to avoid them.

join a garden club or native plant society: you’ll meet like-minded gardeners, learn a lot, and find out about local resources. For example, join your local garden club or the Bergen-Passaic chapter of the Native Plant Society of New Jersey. This Sunday, we will be helping with garden cleanup at the NY-NJ Trail Conference headquarters, 600 Ramapo Valley Road, Mahwah, starting at 1:00 p.m. Come join us!

— Support a local farmer by joining a CSA (community supported agriculture) this season. CSAs allow you to support small-scale, sustainable agriculture and help limit the environmental effects of factory farming. You’ll also find that the produce tastes much, much better than what you buy in the supermarket. For the past 5 years or more, we have joined Hesperides Organica, a family-run farm located in Hawthorne, NY. They deliver weekly to various locations in Bergen County.

Remember, it’s too early to plant many things, but it’s the best possible time to plant a large tree. Trees provide untold benefits to the environment: they clean and cool the air, moderate groundwater runoff, feed and house wildlife, and beautify our environment. Think about it.

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Trout lilies (Erythronium americanum) will be emerging soon in moist woodlands such as the Saddle River County Park.

 

Offers and upcoming events

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Look ahead to spring, when ferns, columbine, and tiarella can grace your shade garden.

Yesterday I told you about Prairie Nursery‘s offer of free shipping on spring orders, available now through January 24 (plants will arrive on the date you specify in spring). Today the catalog for the annual plant sale of the Native Plant Center at Westchester Community College arrived. This is an opportunity to obtain a number of hard-to-find plants, such as spring beauty, golden groundsel, and alternate-leaved dogwood. Place your order by Feb. 21 and pick up your plants in April. Both of these excellent suppliers offer only pure species, which can be better at attracting pollinators than hybrids or cultivars.

On Jan. 25 at 7:30, the Bergen-Passaic chapter of the Native Plant Society of NJ meets for the first time in our new location, the headquarters of the NY-NJ Trail Conference, 600 Ramapo Valley Road, Mahwah. The meeting will be extremely interesting to native plant enthusiasts: the speaker will be Carolyn Summers, author of Designing Gardens with Flora of the American East, and horticulturist at the Native Plant Center. Carolyn will have copies of her book for purchase and signing. At this meeting, we’ll also discuss plans for spring and summer field trips, including one to Carolyn’s garden in the Catskills, so be sure to attend. Contact bergenpassaic@npsnj.org with any questions.

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Aronia melanocarpa (black chokeberry) is one of the wonderful native shrubs you can find at both Prairie Nursery and the Native Plant Center plant sale.

5/6/16: In the garden this week

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As soon as the sun comes out, native columbine (acquilegia canadensis) will leap into bloom, and hummingbirds will appear. This plant does best in poor, dry soil.

In the spring, I can either work or blog, and usually I choose to work! And all the rain we’ve been having is great for planting, and the cool, cloudy weather is wonderful root growth. I’ve been trying to plant ahead of every predicted rainy spell. Finally, a week with enough precipitation for newly installed plants!

Because the weather turned cool, the arrival of spring finally slowed down, and we’re right back on schedule. The catbirds arrived this week, almost the same date as the past couple of years. Flowing dogwood and lilacs are in bloom, birds are extremely active, spring ephemerals will bloom as soon as the sun comes out. The last trees to leaf out, ashes and hackberry, are swelling their leaf buds.

This is the busiest time of year in the garden–the height of planting season. It’s easiest to establish new plants while the soil is still cool, so get your new plants in the ground as soon as you can. Consider a native tree or large shrub for a Mother’s Day gift. In my garden, last year’s lovely red chokeberry is in bloom right now.

In addition to buying Mom a present and taking her out for brunch, here are some things you could be doing in your garden this week:

divide hardy perennials and grasses. Many of the toughest native plants–many grasses, asters, rudbeckias, boltonia, columbine, to name just a few–have been in active growth for weeks. I start dividing as soon as each species is ready, and I try to do it right before it rains (saves watering). I’ve been at it for about a month and have enlarged several beds to receive the divisions. And as usual, I’ve given lots of plants away to friends, clients, and local parks and natural areas.

Harvest cool-weather crops such as lettuce, mesclun mix, spinach, arugula and peas. Plant parsley and dill plants, but hold off on basil for another couple of weeks.

— you should have started vegetable seeds for warm-weather crops such as tomatoes and squash a while ago. (You can find a list of dates for starting seeds in this post.) Hold off on putting these tender crops in the ground for another couple of weeks–until at least May 20.

Weed! Dig up wild garlic and dandelions. Pull garlic mustard if it hasn’t yet set seed. This noxious weed is particularly easy to remove–grab the base of the plant, and unless the soil is compacted, you’ll get the whole root system in one firm tug. Once it’s gone to seed, it’s too late to remove it. Mustards go to seed particularly early, so it’s a good idea to pull them as soon as you recognize them. And they’re easy to pull.

Plant! The weather is perfect. Most reliable mail-order nurseries have started shipping. Once the plants arrive, get them in the ground as soon as you can. If you must hold them for a few days, open the boxes, water as necessary, and keep them in the shadiest spot you can find.

— if you or your lawn service has sown grass seed, water several times a day until the grass is up. Otherwise you’re just scattering birdseed. Otherwise, the lawn certainly doesn’t need watering. And it’s much too early to fertilize. Wait until Memorial Day. Even better, don’t fertilize at all this year. I bet the grass will do just fine.

Happy Mother’s Day! enjoy the garden this week!

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Black chokeberry (Aronia melanocarpa) is in full bloom now. Red chokeberry (A. arbutifolia) has prettier fruit, but black chokeberry has larger flowers and its larger fruit are more attractive to birds.