It’s time to decide which annuals and tropicals will be coming back indoors as the weather cools. Examine these plants and containers, wiping them down if possible, to discourage stowaway pests from coming indoors.
Watering needs are diminished, but September can still be warm and dry. Monitor moisture content in containers and beds.
This is an excellent time to lift and divide many perennials, especially irises (Iris spp. and cvs., Zones 3–9), daylilies (Hemerocallis spp. and cvs., Zones 3–10), and shasta daisies (Leucanthemum × superbum, Zones 5–9).
Mary Ann Newcomer is the author of two books: Rocky Mountain Gardener’s Handbook and Vegetable Gardening in the Mountain States.
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