During the winter, if you have a spot in the house that gets a great deal of sun, turn it into a hothouse for cultivation. It couldn’t be easier to grow your own celery. When you next use celery, chop off the entire root system in one slice. Place the celery, root pointing down, in a glass of water (pictures below) and then plant it once your get some new growth that looks like frilly lettuce (pictured above). Use organic celery, because you’ll get better results with a vegetable that hasn’t been doused in pesticides. Celery is also one of the so-called “Dirty Dozen”: foods that are high in pesticides and best to eat organic. You can let the celery grow, flower and produce seeds that you can collect. Or you can plant the root of every bunch of celery you buy to replace it.