Begin collecting seed of annuals and perennials for next year’s garden. Cut seed heads and place in brown paper bags to dry, labeling each bag with the name of the plant.
Sow pansies, ornamental kale and cabbage, and Swiss chard seed in a good-quality potting medium. After seedlings develop true leaves, transplant them into individual cell packs or pots. Feed with a water-soluble fertilizer. By late September or early October they should be ready to transplant into the garden.
For late crops of beets, carrots, collards, kale, lettuce, spinach, turnips, mustard and radish, sow seeds before the middle of the month. Transplants of broccoli, cabbage, cauliflower and onions can be planted mid to late August.
Stop watering amaryllis bulbs late this month and place them in a dry location. After leaves turn yellow, remove the foliage and store bulbs in a cool, dry and dark site for about two months. If need be, repot bulbs so that the top one-half to two-thirds of each is above the soil. Water and place indoors in a well-lit area. The bulbs should bloom in six to eight weeks.
Divide and transplant iris in August. Cut back the foliage by two-thirds, dig and divide rhizomes, removing any dead portions. Check for iris borers and replant in a sunny, well drained location with one-third of the rhizome above the existing soil level. Water well.
August is also a good time to dig and divide daylilies, using a sharp shovel to split the clumps into desirable sizes. Cut back foliage to five inches and replant in a sunny location.
Lawns continue to need care during the fall. Continue to irrigate during dry spells. Raise the lawn mower to the high setting to allow for additional leaf blade.
Avoid pruning trees and shrubs starting in late August. Particularly hedging plants such as boxwood, hemlock and hollies – since doing so this late in the season can stimulate new growth that will not harden off before frost. If spring-flowering shrubs are pruned now you will be sacrificing next year’s flowers. Delay pruning any tree or shrub until the plant is dormant. Any major pruning should be done in late winter.
“I grow plants for many reasons: to please my eye or to please my soul, to challenge the elements or to challenge my patience, for novelty or for nostalgia, but mostly for the joy in seeing them grow,” said David Hobson.
For more information, contact the UT-TSU Extension Office in Wilson County at 615-444-9584. Ruth Correll, UT Extension-TSU Cooperative Extension agent in Wilson County, may be reached at 615-444-9584 or firstname.lastname@example.org.