Control Japanese Beetle Larvae
Japanese beetle larvae have burrowed into the soil, so it's a good time to treat the soil with beneficial nematodes. These microscopic "worms" burrow into the larvae and kill them, and then reproduce in the soil to help control next year's population of beetle larvae. If you can't find them at a local garden center, check online for a mail-order source.
Bury Bean Vines
Legumes, such as beans and peas, have the ability to take nitrogen from the air and use it for their own benefit. Rather than pulling up the spent plants and adding them to the compost pile, why not keep that nitrogen where it's needed by chopping up the vines and tilling or digging them into the soil.
Plant Trees and Shrubs
The sales are on. There's still plenty of time to plant trees and shrubs, and the prices are right. Root growth will continue into late fall or early winter, and plants won't have the heat of spring or summer to dry them out. Be sure to water well at planting time and every week until they go dormant. If you don't have a spot ready for your new additions, submerge them in the vegetable garden -- pot and all.
Begin preparing tools for storage by cleaning them once you're finished with them. Wipe the soil off shovels, spades, and trowels using a rag or wire brush, then wipe blades with an oiled cloth. Make sure pruners are free from dirt and plant debris, and wipe down the blades with the oiled cloth. Empty any pots of dead plants and soil, adding the debris to the compost pile unless the plants were diseased. In that case, dispose of the plants in the garbage or a location far away from your garden. Rinse pots, or better yet, soak them in a bucket of water to which some bleach has been added. Rinse well.
When the first frost blackens the foliage of dahlias (or if a hard freeze is predicted), cut off the stems about 6 inches above the tubers. Carefully dig the clumps with a spade or fork, and rinse them off. Let them dry out of direct sun and wind for a day (not too long or they'll begin to shrivel). Store the tuber clumps whole, or carefully separate the tubers from the stem, making sure to include any "eyes" (small, raised nubs near where the tubers attach to the main stem) with each tuber. These are the future sprouts. Store tubers in ventilated plastic bags filled with peat moss, vermiculite, or sawdust. Place bags in a box and keep them in a dark, 35- to 50-degree F location.