How to Plant and Grow Nasturtium
Nasturtium seeds are sown directly into the garden after all danger of frost ¾ in. deep, 4-6 in. apart. Thin seedlings to 8-12 in. apart for bush types, and 18-24 in. for trailing varieties. Can be started indoors in peat pots. Kept at 65° F., germination is in 7-14 days.