Phacelia Green Manure Seeds

Phacelia Green Manure Seeds


Phacelia Green Manure is a quick growing hardy annual green manure that germinates at low temperatures and is ideal for sowing from March until September.

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Product Description

Phacelia Green Manure is a quick growing hardy annual green manure that germinates at low temperatures and is ideal for sowing from March until September. It will grow up to 1m in height and is tolerant of cold temperatures and may over-winter if it’s not too cold. It suits most soil types but is particularly good in dry ones.

Phacelia Green Manure 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. However 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 Green Manure is listed as one of the top 20 honey-producing flowers for honeybees and is very attractive to bumblebees and hoverflies. (Hoverflies eat a lot of aphids). A small patch could be left to flower, especially near to vegetables to attract pollinating insects to the area, but don’t have too many as the insects will feed on the Phacelia rather than the veg.

It also makes an excellent cut flower and has a long vase-life with strong stems.

Phacelia Green Manure is part of the Hydrophyllaceae family so fits into any bed in a crop rotation plan.

When to Sow: March, April, May, June, July, August, September.
Growing period:
1-3 months.
Ideal Soil Type:
Dry, Most.
Nitrogen fixer: No.
How to Sow:
Remove weeds especially perennials, rake the soil and scatter the seed at a rate of 1g per sq m. Dig in to a depth of 1cm and lightly water in.
Care: Phacelia Green Manure should be cut down before flowering when the stems are nice and soft as they decompose quicker, retain more beneficial nutrients and are easier to incorporate into the soil. They can be dug into the soil by turning over into the top 15cms or left on the top as a mulch, the worms will drag down the organic matter and help to aerate the soil.
Sow Rate:
1 gram per square metre.
Pack Weight / Area:

When to Sow your Phacelia Green Manure Seeds

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
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General Green Manure Seed Advice & Information

Follow the links below for further Green Manure information:

What is Green Manure ?
Choosing the right Green Manure
How to Sow Green Manure Seeds

External Links

Green Manure – Wikipedia
Green Manures – RHS Website
Full range of seeds also available at

5.00 out of 5

reviews for Phacelia Green Manure Seeds

  1. Ray Berringer
    5 out of 5

    Review  –:

    Phacelia is a very good green manure crop which easily returns to the soil breaking qown very quickly. I also use it in my wildlife annual flower bed, where it is allowed to flower and is beloved of honey bees, bumble Bees and hoverflies, while the pale blue flower looks wonderful with the red of the poppies, yellow corn marigolds, deep blue cornflowers and white cammomile.

  2. Den Goodenough
    5 out of 5

    Review  –:

    Thank you for the prompt delivery!

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