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Green Manure Seeds
We've selected the finest range of Green Manure seeds, ideal for the home grower, allotment or smallholder.
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Phacelia Green Manure Seeds
Phacelia 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 its not too cold. It suits most soil types but is particularly good in dry ones.

Phacelia has beautiful purple/blue flowers with dense fern-like foliage 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 is listed as one of the top 20 honey-producing flowers for honeybees and is very attractive to bumblebees and hoverflies. So small patches 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 and strong stems.

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Phacelia Green Manure Seeds
When to Sow
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Cultivation Requirements
Sow Dates:
March - September
Growing Period:
1-3 months, may overwinter
Soil Type:
Most, but particularly dry ones
Nitrogen Fixer
No
How to Sow: Remove weeds especially perennials, rake the soil and scatter the seed at a rate of 3g per sq m. Dig in to a depth of 1cm and lightly water in.
Qualities: Good weed suppression, quick growing, ability to grow in low temperatures, suited to most soils, if left to flower fantastic for bees and insects and a beautiful flower.
Area Covered:
25g
25m2
50g
50m2
100g
100m2
250g
250m2
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Which Green Manure?
The choice can seem bewildering but with the help of our guide, the options will become easier.

If it still seems like hard work try our Spring, General or Winter Mix depending on the season as these provide the ideal ingredients to suit most situations.

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