Description
Sow seeds directly outdoors from March to May where they are to flower, once the risk of frost has passed.
Sow 5mm deep in well-prepared, finely raked soil.
Keep the soil lightly watered until germination, which usually takes 4-6 days, with seedlings fully emerging within 14-21 days.
When large enough to handle, thin seedlings to around 15cm apart.
Thinned seedlings can be replanted.
For a longer flowering season, sow in succession every few weeks.
Cut back plants once flowering finishes to prevent excessive self-seeding.
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