Dahlia Flower Needs. Jun 19 2019 Photo by. If you are growing rows of dahlias then you will want to use posts to corral your dahlias.
The plants are borne from tubers which require well-drained soil and plenty of sunlight. Dahlias like well-balanced and composted soil and full sun. Initially dahlias do not need lots of water to get started.
Apr 11 2020 Cover lightly but tamp the soil.
Keep surface moist but not soaked until emergence. Thin to 9-12 after first true leaves appear on the dahlia plants. Caring for dahlia plants starts at installation with the cultivation of the soil and healthy tubers. The same goes for the damaged leaves.