I have read the reasons why my dahlias don't look like blooming. If I cut back the mass of leaves, might this make the plants produce bloom?
Dahlias Failing to Bloom
Certified GKH Gardening Expert
Do not cut the foliage, as this is how the plant gathers energy for producing blooms. Try giving the plant some phosphorus-rich fertilizer or bone meal to help encourage flowering. Here is more information: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/bone-meal-fertilizer.htm