I have flowers on 3 varieties out of however many I planted---maybe 8 or 10 varieties. The ones that are flowering are the ones with earlier DTMs. I don't always get flowers on potato plants. They seem more prone to flower when we are having a prolonged period of cool, moist, rainy weather just like we've had for much of April. That don't bloom as much, or at all, in a spring with hot, dry weather. I planted later than usual this year and didn't really expect to see flowers in April this year, but you get what you get. The temperatures we have been having are absolutely perfect for potato plants but I wish we were having more intense sunlight for them instead of constant clouds.

Although I don't know that the two things are necessarily related, I've noticed that tuber initiation often begins around the same time the potato plants flower. Based on that, we'll be able to harvest some new potatoes in a few weeks to go with freshly-picked green beans (which now are just blossoms themselves). Green beans with new potatoes is one of our favorite springtime meals.