Green Manure Phacelia Tanacetifolia Green Manure Phacelia Tanacetifolia. An inter-crop bushy plant with bright blue flowers, perfect as a Nitrogen fixer & much loved by beas & insects alike. A hardy annual it gives good ground cover & establishes dense foliage quickly for digging in prior to flowering. (500gm packet is suitable for approximately 160 square metres) 3000 Organic Phacelia Tanacetifolia Flower Seeds Samen Somen Zaad Zaden Graines Semi Sementi Semillas Fantastic For Pollinators Green Manure