84-91 days maturity. Primula x polyantha. Primula Supernova Seeds. Non-GMO, perennial. Ornamental. Supernova primula seeds promise delicate and early Spring blooms to your garden when others can not. Supernova seeds grow vigorous, frost-hardy primulas that thrive in a wide range of cool and well-shaded North American gardens. Primula supernova seeds grow compact yet durable creeping mounds dazzling with 2 inch blooms in many colors that pop against the deep green foliage.