Crocus Vernus are perennial plants that bloom in early spring... They survive short temperature drops in early spring, flowers appear even through the snow. Growing in small groups of 10-15 bulbs looks best. Crocuses can grow under the trees and with other perennial flowering plants. The soil must be light, humic, well-cultivated, weed-free, sufficiently moist, but not prone to soaking. Crocuses are grown in flower beds, pots, flowering lawns. The flowers are 3-6 cm in diameter. Plants stay in the soil over the winter, can grow in the same place for several years.