how to grow dahlia from bulbs
1 Dahlias are most often grown from tubers (like bulbs) planted in the spring. 2  If you want the best varieties though, be taking notice of the plants that are blooming in early fall, and take note of the variety. 3  One way to do this is to visit a nursery and check out plants in pots.ereâs how to grow dahlias, the easy way! 1  Dahlias are most often grown from tubers (like bulbs) planted in the spring. 2  If you want the best varieties though, be taking notice of the plants that are blooming in early fall, and take note of the variety.
Dahlia Growing Tips. Dahlias that have been grown in pots can be planted in the garden following. the same procedures you would for planting any other perennial plant. If your goal is to produce massive sized flowers, remove all of the side buds at the end of each branch throughout the growing season.ahlia plants grow and bloom best in full sun. Dahlias tolerate most soil types, but prefer a sandy, well drained, slightly acidic soil with a pH of 6.2- 6.5. If your soil is heavy or clay, adding sand and peat moss will help to lighten it. Water established Dahlias thoroughly and deeply once a week.