1. Buy a bag of organic potting soil, cut a few drainage holes in the bottom of it, and then stand the bag where you want to grow your crop. (Put it in a watertight tray if you don’t want to stain the surface beneath.) Potatoes are very hardy, so it’s safe to keep the bag outside as long as the nighttime temperature doesn’t drop much below freezing.
2. Cut open the top of the bag. Tuck two small potatoes about 4 inches deep into the potting mix. If you live near a garden center, you may be able to buy “seed” potatoes; if not, or if you are looking for variety, try using a couple of small organic potatoes from your supermarket (potatoes that are already sprouting are ideal). Water to keep the soil moist but not soggy. Feed with a liquid organic fertilizer every few weeks.
3. When flowers start to pop up on your potato plants, you can pull out a few “new” potatoes by rooting gently around in the soil with your fingers. Or harvest the whole lot anytime, before the plants start to turn yellow. Harvesting is easy: Just tip over the bag onto a sheet of plastic and pick out the fruits of your labor (no digging required). If you have space, you may want to start a new bag every few weeks from very early spring through early summer, to extend your harvest. If thinking “potato” doesn’t make your mouth water, chances are you’ve never tasted the difference between store-bought and fresh-from-the-garden potatoes.