This perennial bunching onion can be harvested year round in mild winter climates and is easy to propagate by division.. It infrequently self-seeds, but clumps will spread slowly in the garden. When grown as an annual, sow seeds in early spring for summer use. Plant 1/4” to 1/2” apart and 1/2” deep. Provide regular shallow cultivation to reduce weed competition. Best performance occurs with consistent moisture during the growing season. The common name "Welsh onion" does not refer to Wales; instead, it derives from a near-obsolete botanical use of "Welsh" in the sense "foreign, non-native." The species is native to China, and naturalized in scattered locations throughout Eurasia and North America. Other names include green onion, salad onion, bunching onions and spring onion.