Description
Start the seeds indoors from January-March.
Sow the seeds thinly on the surface of moist, well-drained seed compost and lightly cover.
Keep at a temperature of 18-20c until germination occurs.
Seeds will usually germinate within 10-21 days.
Once seedlings are large enough to handle, transplant them into individual pots.
Grow on in bright light, keeping the compost just moist.
Gradually acclimatise the plants to outdoor conditions before planting out.
Plant out after the risk of frost has passed into their final flowering position.
Space plants about 20-25 cm apart in borders or beds.
Water regularly during dry spells until established, but avoid waterlogging.
Deadhead spent flowers to encourage continued blooming.
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