Timing is everything when it comes to planting dahlias
Dahlias are a beloved garden flower by so many but despite the number of shops selling the tubers right now, you shouldn't plant them until after the last frost, typically mid to late May in our area. Keep those tuber purchases in a cool, dry area for a couple more months.
In Colorado, dahlias should be planted after the last frost, typically mid to late May, when soil temperatures have warmed. By planning ahead, you’ll be ready to plant at just the right moment, giving your dahlias a strong start and ensuring a vibrant, long-lasting display starting in late August (dahlias take about 90 days to bloom).
This article has excellent information on growing dahlias, including soil prep, how to spot tubers you should toss due to disease, and getting more blooms through strategic cutting.
In Colorado, dahlias should be planted after the last frost, typically mid to late May, when soil temperatures have warmed. By planning ahead, you’ll be ready to plant at just the right moment, giving your dahlias a strong start and ensuring a vibrant, long-lasting display starting in late August (dahlias take about 90 days to bloom).
This article has excellent information on growing dahlias, including soil prep, how to spot tubers you should toss due to disease, and getting more blooms through strategic cutting.
The average last spring frost date for our high-altitude area is generally mid-May. Due to the 90% chance of frost occurring until June 11, it is safest to wait until late May/early June to plant sensitive crops unless plants are well protected.