After all danger of frost has passed in the spring, sow seeds ½ to 1 inch deep, 2 to 3 inches apart, in a sunny location (partial shade in hot climates). Keep moist until germination. Thin to a final spacing of 10 inches. An annual or tender perennial, nasturtiums prefer dry, well-drained or sandy soils, are somewhat drought tolerant, but frost sensitive. They can also be started indoors in pots and transplanted after temperatures remain above 50ºF.