Well, the plant doesn't have to be very old, just old enough to have a couple, few, branches that can be cut off. Usually this takes between 4-6 weeks of growing a plant from seed. I don't recommend cutting the main growing tip unless you plan on cannabilizing the whole plant for clones.
Perp Reviewed by Perp on . How Big? How big/old does a plant have to be to take cuttings? I plan on growing some plants inside this winter. Taking cuttings, and planting them outdoors in the spring/summer. Growing from seed seems to take to long! Thanks. Y.I.C Rating: 5