Scientific Name Dahlia Common Name Dahlia Summer/Fall Bulbs Plant Fact Sheets Consumer Hort Geophyte Organ: Tuberous roots [Double Form] Light Requirements: Full-AM Sun Height: 12-96 inches (30-240 cm) Flowering Season: Summer/Fall Flower Color: Most colors Planting Time: Spring Planting Depth: Cover 3 inches (7.5 cm) Spacing Between Roots: 12-36 inches (30-90 cm) Hardiness: Tender III - injured below 25°F (2°C) Bulb Storage: Harvest tuberous roots in fall, dry carefully (do not wash), and store in vermiculite or dry sand at 35-45°F (2-7°C) Comments:  May suffer during summer heat; prefers a well-drained soil; numerous cultivars; Refer to HIL 8500 Cultivars: --       USDA Hardiness Zones 2 3 4 5 6 7 8 9 10 11 - - Sp/C Sp/C Sp/C Sp/C C/M H H H C=container; H=hardy; M=hardy with mulch; Sp=plant spring, harvest fall; F=fall plant   List by Scientific Name | List by Common Name © Erv Evans, A. A. De Hertough Shoprights NC State University

   
[Cactus form]                       [Semi-double form]