Phacelia is a quick growing hardy annual green manure that germinates at low temperatures and is ideal for sowing from March until September. It’s going to grow up to 1m in height and is tolerant of cold temperatures and may over-winter if it isn’t too cold. It suits most soil types but is particularly good in dry ones. Phacelia has beautiful scented purple/blue flowers with dense fern-like foliage. It smothers weeds and has an extensive root system that improves the soil structure. Alternatively it does self-seed very easily so if it is used as a green manure dig in before flowering or cut down and compost the foliage. It flowers from 6-8 weeks from sowing for a period of 6-8 weeks. Phacelia is listed as some of the top 20 honey-producing flowers for honeybees and is very attractive to bumblebees and hoverflies. (Hoverflies eat numerous aphids). A small patch could be left to flower, especially near to vegetables to draw pollinating insects to the area, but should not have too many as the insects will feed on the Phacelia quite than the veg. It also makes an excellent cut flower and has a long vase-life with strong stems. Phacelia is a part of the Hydrophyllaceae family so fits into any bed in a crop rotation plan.
PHACELIA TANACETIFOLIA, PURPLE TANSY
Grows in MOST soil types
Sow March to end of September
really useful seed coverage of 1g per m2.