Phacelia tanacetifolia in full bloom on a patch of redundant ground is as rewarding a sight as you will see anywhere. Loved by pollinators due to the nectar store within the flowers.
A rapid growing annual with deeply divided leaves and a tall spindly habit. Reaching 1 metre + in height and topped off with heads of pale lilac flowers. The long spindly tap root is good for penetrating soil and helping to restore and improve soil structure. The green manure element should be cut down prior to seed set to avoid a weed problem. Slash down and incorporate into the soil through root cultivation.