Add more flowering perennials to your garden. Late August through early
September is an ideal time to plant them, whether new from the garden
center or divisions from your own plants. Make sure there are two or three
weeks of decent growing conditions expected after planting them. Mulch
around them, then after the tops die, rake leaves or straw on top, too.
Sanitation is the most effect means of controlling insects and disease problems in the garden. Dispose of any infected plant material in the trash, do not compost.
Don’t fertilize or use weed killers on heat stressed lawns, wait until temperatures are more moderate.
Remove overly large cucumbers, zucchini and beans. Allowing them to remain on the vine will inhibit new from developing.
Continue to keep up with gardening chores despite uncomfortable weather and nasty mosquitoes. (Avoid gardening at dusk when they’re most prevalent.) Keep weeding so more weed seeds don’t fall, only to sprout next year. Remove any over-ripe or rotting produce, as it attracts wasps.