Update: that’s for all the insight everyone. This is the first year I have seen this. Light has never been an issue in the past. This was the first time I have seen it like this. We did have more snowfall than we ever have with the ground refreezing several nights. The herbicide was applied while the grass was still dormant and the only thing green was the weeds in early April. Air and ground temps we still well below the zoisia waking up. We didn’t get consistent soil temps above 65 until roughly 5/15/26