It feels like fall is coming early. The evenings and mornings are crisp, and many trees are already showing color. I hope it’s a sign of a cold (dare I say normal?) winter. However, the National Weather Service is predicting above-normal temperatures for the Northeast over the next three months. We must adjust to the new normal: zone 7 rather than zone 6; more fungus diseases of plants; more insect pests.
At least rainfall has been normal this year, even slightly above average (approximately 52 inches for the past year versus a normal of 49). The garden doesn’t look nearly as tired as it usually does in September; I’ve had to water my newly installed trees only two or three times. Normal rainfall is good for the street trees, too: they really suffered during the drought of the previous two growing seasons.
The weather over the next few days promises to be perfect for gardening, so here are some things you might address:
— no need to water new plantings this week: we received approximately 2 inches of rain the past week. But in general, in any week in which we receive less than an inch of rain, water all woody plants installed this season or last fall. Perennials planted this spring should be well-established by now. 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 will not water my new trees or the clients’ gardens I oversee this week.
— 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. And keep picking: don’t let the fruit rot in the garden.
— plant cool-weather crops such as lettuce, arugula, spinach, mustard greens, and peas for fall harvest.
— 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. Milkweed seed needs to be collected almost daily. I try to harvest just when the pods split open so I can easily separate the seeds from the down.
— 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. Now that the nights are cool, it’s a good time to reseed bare areas. But be sure to water newly seeded areas frequently: grass seed will only germinate if kept moist, so give seeded areas a light sprinkling several times a day. 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 certainly do not need water. And always 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.
Enjoy the garden this week!