Root Cuttings: How to Propagate Plants from Root Growth

Propagating from root cuttings is a lesser-known but effective method for certain plants. Ideal candidates include brambles (raspberries, blackberries), fig, lilac, rose, phlox, and Oriental poppy.

What Are Root Cuttings?

Root cuttings are sections of root taken from a dormant plant in late winter or early spring, when carbohydrate levels are high. Choose firm, white roots—avoid any with signs of disease, insects, or rot. The end nearest the plant (the proximal end) produces shoots; planting upside down will fail. Cut at an angle to remember orientation.

Step-by-Step Guide

1. Dig up the parent plant and cut 2- to 3-inch root tips. Replant the parent immediately and water well.
2. Use a sharp knife (not scissors) to avoid crushing.
3. Thin roots: Lay horizontally on moist starting mix; cover with ½ inch of mix.
4. Thick roots: Plant vertically with the cut (proximal) end up.
5. Enclose pots in a plastic bag or cover trays with plastic wrap. Keep out of direct sun.
6. Check moisture regularly. Shoots emerge in several weeks.
7. Once shoots have their own roots, transplant into potting soil. Keep moist and in bright light.
8. Fertilize with half-strength liquid fertilizer if growth seems slow.

Each shoot develops independent roots, and the original root piece eventually disappears. With patience, root cuttings yield vigorous new plants.