The lupins and delphiniums in your garden may need to up their game, as there's a new face in town- the hardy gerbera! Dramatic gerberas are no longer just a houseplant - these hardy plants will thrive in the garden. Once established, each plant will produce up to 100 blooms during the course of their long flowering season. Flowers April-October. Height 20-30cm (8-12"); spread 30-40cm(12-16"). Sweet Sunset - Bright orange flower with yellow centre.