Our high quality dahlia tubers are harvested in Holland and kept cool until they are shipped to the US to our customers. Dahlias should be planted in the spring when there is no danger to frost. Check your frost dates and plant accordingly. They prefer drained soil but need to be watered regularly. Plant them in full sun about 12 to 18 inches apart and 6 to 8 inches deep. Pinch top of dahlias above the 4th set of leaves for more blooms.