How to Grow Coriander from Seeds: Easy Home Growing Guide Seeds like poppies, delphinium, larkspur actually need a cold period to germinate well. , Its called cold stratification. Basically, in nature these seeds would sit through winter before sprouting in Bulk Mini Artificial Succulents Potted Greenery in Vase Decoration Wholesale Strawberry Spinach Salad with Poppyseed Dressing