How to prune a crown of thorns
Euphorbia milii
Quick answer
Cut Euphorbia milii stems to shape branching, open the plant, or remove weak growth. Its milky sap and sharp thorns make skin and eye protection part of the job.
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How to prune a crown of thorns
- 01
Choose what to remove
Pruning targets the woody or succulent stems and branches of Euphorbia milii. A terminal cut and whole-branch removal serve different purposes. Do not cut leaves or treat a thornless-looking hybrid as sap-free.
Cut stems back to axillary buds to increase branching and compactness, remove whole branches to open the plant, and remove weak or thin branches first to improve structure. These goals do not guarantee flowering.
- 02
Make one clean cut
Use a knife that can be cleaned rather than shears that gum up with milky sap. Cut to an axillary bud for branching, or take a weak or whole branch back to its base when opening the plant.
- 03
When pruning will not help
Wear skin and eye protection and account for sharp thorns. Copious milky sap can cause dermatitis, temporary blindness if it reaches the eyes, and poisoning if swallowed. This is handling caution, not a pet-toxicity conclusion.
- 04
Care for the plant after pruning
After pruning, keep people and pets away from sap and thorns and clean the cutting tool.
All crown of thorns guides
Keep reading
Sources4 references
- Royal Botanic Gardens, Kew: Plants of the World OnlineAccepted name · classification · native range
- North Carolina State University Extension Gardener Plant ToolboxDescription · indoor care · cyclical leaf drop · insects, diseases, and other plant problems
- University of Wisconsin–Madison Division of ExtensionLight · watering · fertilizer · temperature · flowering · disease and hybrid context
- University of Florida IFAS Extension: Gardening SolutionsFull sun · container drought tolerance · frost protection · milky sap and spines
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