STEP BY STEP

1 Fill compost. pots with To avoid overwatering and moss growth use a loam-based compost and mix in some sand or grit.

2 Level off compost and firm by watering. Sow seeds thinly. Use single pots as seeds germinate at different rates.

3 Cover lightly with grit or sand to the same depth as the diameter of the seeds. Small seeds may need light to germinate.

4 Place pots in a cool, unheated place. If outside cover with chicken wire to keep mice off. Ensure they never dry out.