Container gardeners can grow onions in limited space by choosing bunching types, which need 6–8 inches of soil, or compact bulb varieties, best grown in 10–12 inches. Bunching onions can be harvested repeatedly; the article recommends 6–8 hours of daily sun, especially for bulbs.
Bunching options include ‘Evergreen Bunching,’ ‘Flavor King,’ ‘Tokyo Long White’ and ‘White Lisbon.’ They grow clusters of stalks rather than relying on bulbs. Small-bulb choices include shallots, ‘Paris Silverskin,’ ‘Pearl Onions,’ ‘Crystal White Wax,’ ‘Purplette’ and ‘Pompeii’; the article says Purplette and Pompeii mature quickly.
Use a loose potting mix with fertilizer, keep the soil moist but not waterlogged, and choose a pot with drainage holes. The article advises thinning bulb seedlings early because overcrowding can stunt bulb development; it says frequent harvesting encourages new growth in bunching onions.
