(as of Apr 04,2021 18:15:50 UTC – Details)
We have always had better luck planting Dahlia seeds than store bought tubers. It’s best to start these early in winter in 4″ pots about 1-2 months before you first frost. We do sneak them into our garden early in zone 7 here in March, but will cover them if we get a frost as the earlier you can get them in the ground the more fully double flowers they will produce. They dislike soggy conditions so make sure your garden bed is raised and not in a low spot in your garden area. You can also direct seed them in spring after your last frost but they will show up much later in early summer and you will get mostly semi-double flowers.
At the end of the growing season you can let the flower heads dry on the stems and collect seeds or dig up the tubers and store them over winter. If you use the tubers next spring you will also get more fully double flowers.
Soil temperature: 65 – 70 degrees fahrenheit
Germination lighting: Dark required,Depth: 1/4″
Germination days: 5 days,Plant spread: 12 inches
Plant height: 40″‘,Plant Type: Annual
Maturation: 55 Days