I planted two of these last spring, they're in moderate sunlight and we're in Denver Colorado. They stayed green all summer and seemed to be healthy but didn't spring any new leaves or appear to grow at all but assumed they were just growing roots for their firs year. They stayed fairly green and healthy through the winter, which was no more harsh than usual and plenty of moisture. A couple of weeks ago, I finally noted fresh small green leaves budding on them. Then we got 4 inches of snow but the temp wasn't lower than 25. Now they both look like this. Are they dead? What happened? First photo is now, bottom photo shows the fresh blooms I was seeing before the spring cold snap.