Don’t toss the root end of your bunch of celery—you can use it to grow more tender stems. As with lettuce, cut the celery base from its stalks, leaving about 1 to 2 inches. The central part of the celery contains the nutrients for producing new stalks. Place the cut celery base into a bowl of water. Change the water every other day to keep the roots fresh. Transplant the roots into soil after eight days in water. Soon you’ll be enjoying quick-and-easy ants on a log using homegrown celery.