Description Heirloom. Colorful, edible nasturtiums tolerate poor soils and heat or cold Each packet contains 50 seeds Sow outdoors 4 weeks after the average last frost date Plant Height is 10″. plant spread is 8″ Annual for all growing zones from 1-11. Sunlight exposure = full-sun Find over 1000 Burpee vegetable, herb, and flower seeds on Amazon Get your seeds off to a great start with a Burpee Seed Starting Kit Burpee, the gardener’s best friend since 1876. Beautiful plants and everything else you need to grow the garden of your dreams from America’s most trusted seed company. No GMOs, ever.