Transplants are preferred for home gardeners. Sow 3 seeds 5mm-1cm (¼-½") deep in each cell of a 72-cell tray. Transplant as a clump, spacing each 12-15cm (5-6") apart in rows 45-75cm (18-30") apart. Scallions can be spaced at 2-5cm (1-2") apart in rows 15cm (6") apart.