Dahlia Flower Zone. Plant the tubers in spring and the plants will be blooming by mid to late summer. Heres his simple but important advice.
Dahlias like well drained soil so augment your soil with organic material such as compost and chicken manure. Toxic to dogs. The bora bora is a variation of dahlia that has spike-like petals that are coral pink in color.
Dahlias love moist moderate climates.
San Fransico Mayor Gavin Newsom declared Saturday August 21st to be Dahlia Flower Day in San Fransisco. In zones 7-8 and below dahlias either need to be lifted and stored for winter in a dry and cool place - between 50F and 60F 10C and 15C or treated as annuals. Planting Preparing the spot. If you are planting a number of dahlias in the same location they should be separated by about 2 feet to give each plant.