Family Asteraceae
Hardiness 4 - 10
Native Mexico
Sun exposure full sun - light shade
Soil Widely adaptable, well drained
Soil pH 6 - 6,5
Color range orange, pink, purple, red, scarlet, yellow and white

Dahlias are favorites for the flower garden. There are at least 30 species and 2000 cultivars.
Dahlias varieties are based on their sizes, flowering patterns and resemblance to other flowers. They have a variety of flower shapes and sizes (2 to 12 inches) and a wide height range (1 to 6 ft).

Dahlia common cultivars

‘Bednall Beauty’, ‘Bishop of Canterbury’, ‘Bishop of York’, 'Colorado Classic', 'Clearview Irene', 'Classic Giselle', 'Chimacum Julia', 'Chick A Dee'

  • Do it in February – mid March.
  • Fill a pot with moist multi-purpose compost, sow dahlia seeds on the surface and push them gently into the compost.
  • The seeds will germinate a little faster if you use a heating mat.
  • The seedlings are ready to pot up singly when the second pair of leaves appear.
  • Young plants are ready to plant outdoors in mid May when all danger from frost has passed.
  • Large tuberous roots may be planted about 2 weeks before the last spring frost date.
  • Spacing between plants depends upon the cultivar, smaller dahlias can be spaced 2 ft apart, large-flowering can be spaced 3 to 4 ft apart.
  • Dig a hole 8 to 10 inches deep, loosen the soil in the bottom of the hole and refill to a depth of 6 inches. Set the tuberous root on its side, with the eyes facing upward and cover with 2 to 3 inches of soil.
  • Dahlias are heavy users of water; keep the soil moist.
  • When plants are 3 to 4 pairs of leaves, pinch out the terminal shoot.
  • Begin staking when the plants are about a foot in height.
  • Fertilize monthly with a water soluble fertilizer.
  • Flower size can be increased by removing lateral flower buds.
  • Tuberous root usually produces multiple shoots, leave 1 - 4 of the strongest shoots.