Dahlia, Giant Decorative Hybrids

It is not generally realised that Dahlias can be treated as half-hardy annuals and readily raised from seed, flowering without any difficulty the same year. They do not come true from seed and the resulting flowers will be very variable. However, at the very least all will make excellent, much admired cut flowers and the tubers from the best can be lifted, stored and grown again the following year. This very variation makes growing Dahlias from seed quite a fascinating occupation. Wide range of colours. 5ft (1.5m)

All the Dahlias we offer can be very easily grown as half-hardy annuals and flower the first year from seed.

Germination Instructions

Sow indoors. Surface sow onto moist well-drained seed compost in a seed tray. Propagate at 18°C. Germination takes 10-14 days. When seedlings are large enough to handle transplant to 8cm pots, handle the root system carefully. Grow on in cooler conditions 7-13°C. Acclimatise and plant out once danger of frost has passed with 100cm spacing. Can be sown in an unheated greenhouse without propagation. Can be sown directly, germination takes 1-2 weeks approx.

Growing Instructions

Prefers fertile humus-rich well-drained soil enriched with organic matter and fertiliser in full sun. Pinch out growing tips to encourage bushy plants and stake where required. Water freely in dry periods. Prone to blackfly, treat as desired.

Cultivation Instructions

Cut flowers or deadhead to prolong flowering window. Cut back to ground level in the autumn before lifting and storing the tuber for the winter. Propagate from softwood cuttings taken in spring from stored tubers or divide tubers ensuring each one has a viable bud.