. . . "an (top-setting) onions can be divided and replanted now. -Sowing seeds of radish, lettuce, spinach and other greens in a cold frame will prolong fall harvests. -Keep broccoli picked regularly to encourage additional production of side shoots. -Pinch out the top of Brussels sprout plants to plump out the developing sprouts. -Harvest herbs now to freeze or dry for winter use. -Tie leaves around cau" . .