Troubleshooting
Crested Euphorbia problems — and how to fix them
Crested Euphorbia (Euphorbia lactea) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Root and base rot
Caused by overwatering or a heavy, water-retentive mix. Water only when bone dry and use gritty, free-draining soil.
Graft failure
The crest is grafted onto a rootstock; cold, rot or a weak union can cause the top to brown and detach. Keep warm and dry at the join.
Etiolation and pale colour
Too little light makes the crest stretch, soften and lose its mottled markings. Move to your brightest window.
Mealybugs
White cottony clusters hide in the folds of the crest. Dab with 70% isopropyl alcohol on a cotton bud and isolate the plant.
Prevent crested euphorbia problems before they start
Most crested euphorbia issues are care-mismatch, not bad luck. Dial in the basics:
Crested Euphorbia problems — FAQ
Why is my crested euphorbia root and base rot?
Caused by overwatering or a heavy, water-retentive mix. Water only when bone dry and use gritty, free-draining soil.
Why is my crested euphorbia graft failure?
The crest is grafted onto a rootstock; cold, rot or a weak union can cause the top to brown and detach. Keep warm and dry at the join.
Why is my crested euphorbia etiolation and pale colour?
Too little light makes the crest stretch, soften and lose its mottled markings. Move to your brightest window.
Why is my crested euphorbia mealybugs?
White cottony clusters hide in the folds of the crest. Dab with 70% isopropyl alcohol on a cotton bud and isolate the plant.