Dahlia 'Allens High Voltage', 2018 photo, Common Name: Purple Informal Decorative Dahlia, Size: 5ft., B ID PR26 Class(2109) Awards(), Breeder: (Allen Manuel 2018), USDA Hardiness Zone 8, Michigan Bloom Month 1, In Garden Bed J2 for 123 DAYS (Cowl). Planted in 2018.
A 2018 introduction. Bench score average of 3 was 86.04, trial garden average of 3 was 87.03. True purple with a bluish reverse. However, it is not an ideal garden plant. Initial blooms were outstanding, later blooms were a disappointment. The lateral blooms are especially disappointing: weak stems and flowers with open centers. My guess is that if you are showing this dahlia, the lateral buds never see the light of day. The American Dahlia Society's focus is on showing dahlias. Members register dahlias so they can be shown. Usually, show dahlias do great in the garden, but not always. Here is an early photo...
And some later photos
I don't think this dahlia will see the light of day in my garden next year:)