In this transition month from summer to fall, continue to harvest warm-season crops to keep tomato, squash, beans and other plants producing as long as possible. Spent veggie plants, on the other hand, should be pulled and composted. Heat-loving summer annuals get the same treatment pruned if performing, yanked if not. Don't plant any more regardless of how tempting they look in nurseries now. Cut-back summer blooming perennials to remove spent blooms; some will bloom again as mild weather returns. Avoid pruning spring bloomers now; many will already be setting buds for next season's display.