Most of the evergreen types of euphorbias will self-sow when the correct conditions present themselves. New seedlings can be removed from the plant when young. The non-evergreen types can be divided like most perennials in early spring or in early autumn. Evergreen and woody species can easily be grown from cuttings using these steps too.
In spring before the flower buds emerge, take tip cuttings off the plant. They should be at least 1 inch long.
Remove several leaves from the bottom of each cutting.
Wash off the milky sap from the cuttings in cold water. Allow the cuttings to dry for at least a day and up to a week.
Dip the end of each cutting into rooting hormone.
Stick the bottom end of each cutting into a pot filled with potting mix and water. The cuttings should root within two weeks.
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