Step-by-Step: Rooting Trumpet Vine Cuttings in Late Summer

Propagating Campsis radicans from Semi-Hardwood Cuttings

Late August is suitable for semi-hardwood cuttings in many regions. Follow these steps for best results:

Cutting Preparation

1. Select healthy, non-flowering shoots of current season's growth, 4–6 inches long.
2. Cut just below a node at a 45° angle. Remove lower leaves; keep 2–3 top leaves.
3. Dip base in rooting hormone powder (e.g., Rootone).

Rooting Medium

Use a sterile, well-draining mix: 1:1 peat moss and perlite, or coarse sand. Moisten thoroughly but not soggy.

Environment

• Insert cutting 1–2 inches deep.
• Cover with clear plastic dome or bag to maintain high humidity. Keep cuttings from touching plastic.
• Place in bright, indirect light at 70–75°F (21–24°C).
• Vent daily to prevent fungal issues.

Checking Roots

After 6–8 weeks, gently tug; resistance indicates rooting. Alternatively, carefully lift to inspect for white roots.

Overwintering

If rooted before frost, pot up and keep in a cool (40–50°F), bright location. Water sparingly. Plant out in spring after last frost.

If not rooted by frost, keep in the rooting chamber over winter with minimal water; they may root in spring.