Most elephantâs ears are perennials and will come back every summer in the Lower, Coastal, and Tropical South. Some are perennials in the lower part of the Middle South.
Dahlias are available in different heights, dwarf dahlias are normally 12 to 18, and the taller dahlias grow 5' to 6'.Dahlias up to 2 ft.ahlias are available in different heights, dwarf dahlias are normally 12 to 18, and the taller dahlias grow 5' to 6'. Dahlias up to 2 ft.
How to grow dahlias from tubers. When growing dahlia tubers, plant them directly in the ground from around mid-April. Donât worry about frosts as the soil will insulate them. Prepare a planting hole that is 10-15cm (4-6) deep, and wide enough to accommodate the dahlia tuber comfortably.