These Sturdy Little Star-spangled Dahlias Are Perfect For Border Edges & In Patio Containers Unique, Bi-coloured Starry Blooms Will Smother The Plants Until The Frosts.plant Tubers Outdoors In April, After All Chance Of Frost Has Passed. Dahlias Require Sun, & Well Drained Soil With Plenty Of Manure Or Compost. Plant Tubers 15cm (6"") Deep & 60cm (25"") Apart & Water Well. Dahlias Can Alternatively Be Started Off In Pots In A Frost Free Greenhouse & Planted Out In June.buy 1 Get 1 Free -6 Plants For £9.95flowers July-september.height 75cm/30in.