Dahlia Cactus Flower Hybrids Mixed Seeds

Sow dahlia seeds indoors in trays from February until April. Cover the seeds with about 0.5cm of fine seed compost and ensure good drainage. When the seedlings are large enough to handle, give them their own pots and plant them out into the garden once the risk of frost has passed. 

Cactus dahlias, like other dahlias, prefer moist, well-drained soils with plenty of organic matter. They thrive best in full sun. Dahlias are not frost-hardy, so once the frost has damaged them in autumn, cut them back and mulch the tubers to help them survive the winter, or lift them and store them somewhere safe and dry for winter. Keep cutting the flowers to encourage fresh growth and more blooms.

Yes, dahlias can be grown from seed, and the process is surprisingly simple. Dahlias grown from seed will form tubers, which, if cared for correctly, can last many years, even decades.