Phacelia has a great root structure to break up clay soil. Phacelia is a long day plant, flowering only when days are longer than 13 hours (May—Sept). It germinates at temperatures above 37F and winterkills at 18F. Great as a pollinator because it’s vibrant blue flowers attract bees and other insects. A quick growing plant which makes a fine, feathery but dense carpet that shades and holds the soil but allows moisture to trickle through. The extensive root systems creates biomass comparable to buckwheat. Fibrous root system can reach a depth of 30 inches. Phacelia is capable of producing 3-7 tons per acre of biomass in 14 weeks contributing 15-20 units of nitrogen per acre.