The decorative dahlia Duet is distinguished by its double flowers and wide, flattened red petals with white tips. This variety is superb in bouquets or clumps. These Duet dahlias captivate the eye with their floral splendor, adding a lively and refined touch to any garden space. Planting dahlias Plant 6 cm deep in a sunny, wind-protected location in rich, well-drained soil. Keep 60 to 90 cm between plants. Install stakes. Be careful of excess moisture. Water thoroughly when planting. Maintenance Pinch back the lateral stems and cut off the secondary buds. Add organic fertilizer at the end of summer. Dahlias are sensitive to cold and must be overwintered. In November, the first frosts turn the foliage black, it is time to pull them up and store them away from frost in the dark, in crates, in a cool, airy but not too humid place.