No fall color from aspens - anything we can do?
Hi, everyone. Our group of aspens were planted about three years ago. They have never shown fall color; just go from green to brown. They're on an irrigation system. We're at 6100 feet. Does anyone know a cure for this? Nurseries I've consulted -- there aren't many in this rural area --haven't been much help. Thanks very much. Other aspens in the area are varied -- some turn gold, some don't.