9/9/16: In the garden this week

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Summer-blooming perennials are still going strong, but asters are beginning to make their presence felt in the early fall garden.

It’s hot, hot and dry. Once again, one weather system after another passes us by. I have actually watered some of my established perennials–that’s how dry it’s been. Perhaps we’ll finally get some relief over the weekend.

Once it cools down a bit and you feel like getting out into the garden, here are some seasonal tasks to consider:

water new plantings: in any week in which we receive less than an inch of rain, like this week, water all woody plants installed this spring or last fall. Perennials planted last spring should be well-established, but those planted last fall or this spring need supplemental watering during dry spells. 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. Sunday is my watering day, and I’m going to water my new trees and shrubs.

practice good horticulture with warm-season crops such as tomatoes, peppers, squash, eggplant, beans, corn, and cucumbers. This is particularly important as the season winds down. Monitor for insect eggs and larvae and remove them before infestations become serious. Throw out badly infested or diseased plants to prevent the spread of disease (do not compost diseased or infested plant material).

— as tomatoes ripen their fruit, cut back on watering to avoid split fruits: provide no more than an inch of water per week. (If it rains, don’t water.) Keep removing suckers. Look at this post, this one, and this one for basic information about growing tomatoes.

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. You’ll be able to plant right through the mulch and thatch next spring. You can scatter seeds there as you collect them.

collect seeds. Coreopsis seed ripens nearly every day. So does seed of daisy fleabane, a lovely native annual. It pops up in different parts of my garden each year. Seed of purple lovegrass and of little bluestem is ripening, as are seeds of nodding joe pye weed, penstemon, prairie onion, and monarda.

— follow a sustainable lawn care regimen: if you feel you must fertilize your lawn, best practice is to give it no more than two applications of slow-release organic fertilizer each season, around Memorial Day and Labor Day. Even though Labor Day is past, hold off until the weather cools down a bit. And it’s still too hot to reseed bare areas. Early fall is the best time to do this, but wait until things cool down. If you have a place where grass won’t grow, plan to plant something that will, like shade-loving native perennials. Let the grass grow at least 3″ tall for maximum photosynthesis. Lawns do not need water now (or ever), but if you do water, do it infrequently and deeply to encourage deep root growth. One inch of water once a week is much better than a few minutes each day. But remember: the more you water, the more you’ll have to mow!

— plan for next season: Do it now, while the garden is still growing. 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.

I love this time of year in the garden! The asters are finally blooming, and the native grasses are glowing in the sun. Enjoy the garden this week.

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New England aster

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Little bluestem

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