Can be 8 feet (250cm) tall and 6 feet (180cm) broad but not "dense" as the characteristic frothy dissected foliage is not heavy, with vibrant scattered flowers in rich orange all through the late summer and autumn. Will grow in the open ground, mulched but not otherwise protected and surviving here to -15ºC in past winters. Very young plants do not show up the dissected leaf but develop this as they get older.
Sow the seed in moist seed compost and cover with a thin layer of compost and germinate in warm conditions. When big enough to handle prick out the seedlings into individual pots and grow on in warm conditions. Harden off before planting into the garden. Dahlias like a rich fertile soil. These should flower in their first season.
Height to 8' (250cm)