20 Large Crocus Bulbs. Crocus vernus Blue Moon Mixture is a striking combination of purple, blue and white bulbs. Blue Moon Mix Crocus naturalize easily and look lovely planted into a lawn. These large blooming crocus are easy to grow in well-drained soil in full sun or partial shade. They are also a perfect bulb for forcing indoors. Ideal for mass planting or as an edging for mixed borders, these low-growing favorites are sure to delight. Made in USA. Ships from Iowa 20 Large Crocus Bulbs. Crocus vernus Blue Moon Mixture is a striking combination of purple, blue and white bulbs. Ideal for mass planting. Beautiful vibrant colors bloom early spring. Made in USA. Ships from Iowa. Hardy in zones 3-8; Plant in the fall for early spring blooms