Crassula corymbulosa 'Shark's Tooth' (4") Red Pagoda Crassula (4") Morningsun Herb Farm 6 Best Seed Catalogs for Organic, Heirloom, Non GMO Vegetables Clean Green Simple Beckoning Blooms: North Carolina's Native Red Flowers WALTER Magazine How to Collect and Save Rose Seeds Gardener's Path Plant your poppies when it's cold! Poppy seeds require a period of cold to germinate and grow, so they generally do best when planted in the late fall or early spring.