The Q&A Archives: Euphorbia milla

Question: I have a big beatuiful Euphorbia milla that is blooming small yellow flowers. I would like to know if I can take cutting from this plant to start more. My plant is about 80 years old and if I every lose it I would like to have more started.
Beside the thorns she is a lovely plant.

Answer: You can propagate your crown of thorns by taking 3-4" stem tip cuttings and rooting them in moistened sand or vermiculite. I have great success by making a propagation pot that's almost care-free. Start with a 6" plastic pot and place a single paper towel on the bottom (fold the sides over so the towel rests on the bottom of the pot rather than going up the sides of the pot). Then fill the pot with pre-moistened vermiculite. Take a 2" terra cotta pot (found in most craft stores or garden centers) and plug the bottom hole with florists clay or tape over it with duct tape. Soak the terra cotta pot in water for 10-15 mintues, then press it into the center of the nursery pot filled with vermiculite. (You may have to remove some vermiculite to make it fit!) When the terra cotta pot is nestled into the vermiculite, fill it with fresh water. You'll want to keep a constant supply of water in this reservoir for the duration of your propagation project. Then take the tip cuttings from your euphorbia and stick them into the vermiculite. You can space them an inch or two apart. The water in the terra cotta pot will keep the vermiculite just damp enough to encourage rooting. Be sure to keep the water level constant in the terra cotta pot. Your cuttings should root in 2-3 weeks.

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