Propagating Aucuba: A Step-by-Step Guide to Rooting Cuttings

When to Take Aucuba Cuttings

The best time to propagate aucuba (Aucuba japonica) is late spring to early summer when new growth has partially hardened. In New York, aim for late May through June. Avoid the heat of midsummer and the cold of winter.

Preparing the Cuttings

Select healthy, non-flowering shoots 4–6 inches long. Cut just below a leaf node, remove the lower leaves, and leave two or three pairs at the top. A clean, sharp knife or pruners prevents crushing the stem.

Rooting Medium and Hormone

Use a well-draining mix of equal parts perlite and peat moss or a commercial seed-starting mix. Dip the cut end in rooting hormone powder (0.1% IBA) to speed root formation, though aucuba often roots without it. Insert cuttings 1–2 inches deep, firm the medium, and water gently.

Care During Rooting

Place the pot in bright, indirect light. Maintain high humidity with a clear plastic bag or dome, venting daily to prevent mold. Keep the medium evenly moist but not soggy. Roots typically appear in 4–8 weeks.

Transplanting

Once roots are 1–2 inches long, pot each cutting into individual containers with potting soil. Grow them in a sheltered spot for the first winter, then plant out the following spring after the last frost.