Dahlia Flower How To Grow. Dahlias can be planted as late as mid-June in most parts of the country. By planting a dahlia tuber you will grow an identical plant from the mother plant.
How to grow it. Dahlias require full sun at least 8 hours daily to thrive and bloom abundantly. They thrive in well-drained fertile soil that is slightly acidic.
Southern growers might need to provide plants with afternoon shade if summer temperatures are extreme.
Southern growers might need to provide plants with afternoon shade if summer temperatures are extreme. In order to flower well dahlias need full sun preferably at least six to eight hours a day. A good dahlia growing tip is to take this time to incorporate 2 pounds per 100 square feet 1 kg. They thrive in well-drained fertile soil that is slightly acidic.