Common name: Masterwort

Astrantia is a hardy herbaceous clump forming perennial suited to sun and shade.

It is a good subject for that wild garden look, particularly in a partially shaded area where the soil remains quite moist in summer.

The clusters of purple-red or white flowers that appear in July grow to about 300-500mm (12”-18”) high with a similar spread.

Astrantia flowers

The flowers are also useful in a cut flower arrangement.

In an exposed position the plants may need supporting with twiggy sticks.


Week 3:

Normally seeds are sown in summer / autumn of the previous year in a cold frame, however if this was not possible you can make a sowing in a frost free greenhouse at around 10°C (50°F) and hopefully make up for lost time.

Once germinated ensure that the seedlings get the maximum light available to avoid soft leggy growth.

Week 13:

Prick out the seedlings sown the previous year into 70mm (3”) pots and grow on in a coldframe until planting out time.

Week 26 - 30:

Sow seeds in seed compost and place in a cold frame to germinate.

Subject to ambient temperatures they may take 1-2 months to germinate.

Week 35-40:

Cut down the stems after flowering.

Now is also a suitable time to divide and replant established plants.

Week 40:

Plant out potted seedlings between now and March in any ordinary garden soil at 200-300mm (8”-12”) centers.

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