- Start the seeds indoors from February-April.
- Sow the seeds about 3mm deep into moist, well‑drained seed compost and lightly cover.
- For better germination, cold stratify by chilling the sown pots in the fridge for 2 weeks before placing them in warmth.
- Keep at a temperature of 15-18c until germination occurs, they can be slow to sprout.
- Seeds will usually germinate within 14-21 days under good conditions.
- Once seedlings are large enough to handle, transplant them into small pots to grow on.
- Grow the young plants on in cooler conditions with good light.
- Gradually acclimatise the plants to outdoor conditions before planting out.
- Plant out after the risk of frost has passed into a sunny, well‑drained site.
- Space plants about 30cm apart.
- Water moderately during dry spells until established, but avoid waterlogging.
- Tall stems may need staking or light support in exposed positions.
- Remove spent flowers to encourage continued blooming, or leave them if you want seeds to self‑sow.





