Our euphorbia "lady slipper" plant has developed black spots on the tips of the stalks. We bought this about a year ago and it has shown no signs of change in the entire time. We had it in a clay pot and just moved it to a plastic pot because it didn't seem to dry out much in the clay. Now the stalks have black spots in the tips. What does that mean?
Euphorbia With Black Spots
Certified GKH Gardening Expert
I assume you are saying you have not had any flowers form on your Euphorbia.
Though the stems look green and viable, I believe your issues are growing environment.
I have listed a few links for you to get your plant growing--hopefully!
The Black Spots are most likely a fungus and would need treatment, Neem Oil would be a good choice.