Plant Cover Crops
Plant a fall cover crop, such as annual ryegrass, to hold the soil in areas of the garden that have finished producing. This grass will grow through the fall and die off in winter or early spring. Till the sod under to add organic matter to the soil.
Daylilies that didn't flower well this summer can be divided now and replanted. Daylilies often will overcrowd themselves. Cut back the foliage to 6 inches from the ground. Lift the enture clump, divide off sections, and replant in soil amended with compost. Keep well watered this fall and they'll bloom again next summer.
Fall is the perfect time to transplant peonies. Dig up poor performing peonies, find a full sun location, amend the soil with super phosphate or bone meal fertilizer, set the peony so the crown is only 1 to 2 inches below the soil level, backfill with native soil and keep well watered.
Store Winter Squash
Winter squash such as buttercup, butternut, and acorn is harvested when the fruits have reached their full color and the skin is thick. Leave a few inches of stem when you cut the squash, let me cure in a warm spot for one week, then store them in a 50oF to 60oF degree room for winter. They'll last up to 6 months in storage.
Once the foliage has yellowed and begins to dieback, dig gladiolus corms for storage. Let the corms dry and remove excess soil. Store them in mesh bags or in boxes filled with peat moss in a 40oF airy room with 70% humidity. Check throughout the winter for rotting.