Dahlias love sun. Place root on its side about 6″ inches deep in loose soil that is well drained. If you have gravely/ very sandy soil you might want to mix in some compost with the sandy soil. Allow for 12 ” spacing between plants. Use 5-10-10 fertilizer a few times after the plant is a foot tall. Water once weekly. Remove dead head flowers to encourage blooming. Blooms from August until frost.
Bulbs need to be dug up for the winter. Store in a dry, dark 40-45 degree location.