Description
Sow indoors from JanuaryApril on the surface of moist seed compost.
Lightly press seeds in but dont cover, as light is needed for germination.
Keep at 18-20c. Germination takes 14-21 days.
When seedlings are large enough to handle, prick out into individual pots and grow on in cooler, bright conditions.
Harden off before planting outdoors once frost risk has passed.
Plant in partial shade or sun, in moist, well-drained soil, spacing 30-45cm apart.
Alternatively, direct sow outdoors May-June.
Thin seedlings as needed.
Water regularly during establishment but avoid waterlogging.
Stake if needed.
Deadhead spent flowers or leave some to self-seed naturally.
A hardy biennial, usually flowering in its second year.
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