Please help why do the Leaves on my Dipladenia keep turning yellow and drop off. I have one indoors and one in a cold greenhouse, both are affected. They are however both flowering
I've seen it with Dipladenia that either aren't warm enough or have wet roots, either from overwatering or poor drainage.
Many thanks, they did get a bit dry and I thought maybe I was not watering enough as they seemed to drink it up. Will hold back and see if there is an improvement.