Orange Climbing Rose Flower Seeds for Planting Heirloom Non GMO Garden Seeds Organic Burgess Buttercup Winter Squash Cucurbita maxima non GMO Seeds Epimedium Xera Plants Nigella is one of those flowers that actually prefers the cool soil of early spring. In Zone 6b, I start sowing my nigella seeds in late winter and continue sowing through early Amazon.com : Outsidepride White Blutopia Bacopa Seeds 10 Pcs Low Maintenance Perennial Flower Seeds with Cascading, Vibrant Blooms & Trailing Growth Habit, for Containers, Baskets, & Window Boxes : Bacopa Plants :