Starting Dahlia Tubers Indoors - 1 Gallon Pot Inventory - March 2026
Dahlia season is coming fast. Or, at least it is feeling like it is coming fast to this gardener. The past two seasons, I've started my tubers indoors, well ahead of the last frost date (around Mid-May here). In 2024, I started them in early May. There were only six tubers to start. How quaint. Looks like I ended up with twelve total . I planted them outdoors in June 2024 . Last year, in 2025, I also planted them up starting indoors. In early May . By mid-May they were showing signs of growth . I began to harden-the-off towards the end of May and (like 2024), planted them outside in the beginning of June . Last year, I also pinched them all back to try to get bush-ier growth. My plan for 2026 is to follow a similar trajectory, but I'm thinking I can start them even earlier. Like mid-April. The last frost date varies around here , but generally is between the middle and end of May....