Dahlias in Alverton

Place tubers in trays with moist compost, eye-side up, and cover lightly. Keep at 15–20 °C in a bright spot indoors from 11th January - 25th January. Water sparingly until shoots appear.

Once shoots are 5–10 cm tall, pot each tuber into individual containers with multi-purpose compost from 8th February - 15th February. Grow on in a bright, frost-free place.

Gradually acclimatise plants to outdoor conditions over 10-14 days from 1st March - 8th March. Place outside during the day and bring in at night, avoiding frost.

Transplant into well-drained, fertile soil in full sun after frosts from 8th March - 22nd March. Space plants 60 apart and water in well. Use fleece if cold nights are forecast.

Insert stakes at planting to support tall stems. Pinch out the growing tip when plants reach 30–40 cm to encourage bushiness from 22nd March - 29th March.

Water regularly to keep soil moist, especially in dry spells. Feed every 14 days with a high-potash fertiliser from 17th November to boost flowering. Stop feeding by 29th March.

Remove spent flowers weekly from 24th November to encourage continuous blooms. Cut back to a leaf joint to promote new buds.

After the first frost blackens foliage, cut stems back and carefully lift tubers from 8th December - 22nd December. Dry, label, and store in frost-free conditions in dry compost or sand over winter.