Semi-Ripe Cuttings: The Mid-Summer Propagation Method

Semi-ripe cuttings occupy the sweet spot between the fragility of spring softwood and the toughness of winter hardwood. Taken from mid-summer through early autumn, the material has firmed up at its base but still retains green, growing tissue near the tip. This makes it more durable than softwood while still rooting readily. Camellias, lavender, ceanothus, escallonia, rosemary, and most evergreen shrubs respond particularly well.

Identifying Semi-Ripe Wood

Pick up a shoot and flex it. Softwood bends and stays bent; hardwood snaps cleanly. Semi-ripe material sits in between — it flexes at the tip but feels firmer at the base and resists snapping with a slight spring-back. The base of the current season's growth will have begun to turn from bright green to a paler, slightly woodier green. That transition zone is exactly what you want: firm enough to handle without wilting instantly, soft enough to root within weeks rather than months.

Taking the Cutting

Cut sideshoots 7–12 cm long, severing just below a leaf node or, for a heel cutting, pulling the sideshoot away from the main stem with a small wedge of older wood still attached. Heel cuttings often root faster because the heel contains a concentration of natural rooting hormones. Remove leaves from the lower half of the stem and dip the base in rooting hormone powder or gel. Insert into a 50:50 perlite and coir mix, firming well.

Heat and Humidity Requirements

Semi-ripe cuttings root more slowly than softwood — often six to twelve weeks — so maintaining steady conditions matters. A cold frame or unheated propagator is ideal: it provides some warmth during the day while protecting from extremes at night. Bottom heat of around 18 °C speeds rooting significantly for borderline-hardy species. Mist the foliage lightly each morning, or use a humidity tent, and check regularly for mould on any fallen leaves, which can spread quickly in enclosed conditions.

Aftercare and Potting On

Rooted semi-ripe cuttings taken in late summer or autumn can be overwintered in the cold frame without potting on, as disturbing them in cold weather increases losses. Wait until new growth is visible in spring, then pot into individual containers using a well-drained peat-free compost. Give them a season in pots before planting out permanently. This approach is especially important for borderline-hardy subjects like some lavenders or ceanothus, which need a protected first winter to establish a robust root system.