Semi-Ripe Cuttings: Reading the Bend Test

A shoot is ready for a semi-ripe cutting when its base has firmed up while the tip is still soft: bendy, but not too soft. Bend a shoot of this year's growth between finger and thumb a few centimetres back from the tip. A shoot that folds over and hangs limp is too soft, so check again in a week or two. One that resists, holds for a moment and then gives way with a clean snap at the firm base is ready. One that won't bend at all, or cracks with a dry, woody snap that tears the bark, has gone past the stage. Take 10 to 15cm cuttings in summer to early autumn, root them in a 50:50 mix of peat-freeCompost made without peat, which is harvested from a slow-forming, carbon-storing wetland habitat that peat extraction damages. Full definition → potting compost and sharp sand under humid cover, and overwinterKeeping a plant alive and intact through the cold months, whether left outdoors, moved under cover, or stored dormant. Full definition → them somewhere sheltered.

What the bend test tells you

A shoot starts the year soft and green, mostly water and thin-walled cells, so a spring shoot bends without resistance and just kinks. As the season goes on, the tissue stiffens from the base upward while the growing tip stays soft longest. The bend test is a hand check for that transition. Still-soft wood folds, wood firm at the base but soft further up bends with some resistance, and wood that has gone fully hard resists bending altogether.

That middle stage is what "semi-ripe" means: material from this season's growth once the base is firm and the tip is still soft. It is worth testing by hand rather than by date. Two shoots on the same plant, or the same shrub in two summers, don't firm up at the same time, and a cutting taken too soft or too hard roots less reliably.

When to test

Semi-ripe cuttings are taken from summer into early autumn (roughly July to September), and it is worth checking shoots through the whole stretch rather than taking everything on one day. Box is earlier, in early to midsummer as the new growth begins to firm. Softwood cuttings come from the same season's growth earlier, before any of it has firmed, in late spring and early summer; hardwood cuttings come from fully ripened, leafless wood in mid-autumn to late winter.

Scotland's growing season starts later than further south, sometimes much later inland and at altitude (see frost dates by region), and a later start can mean this year's shoots take longer to reach the firm-based, soft-tipped stage. A shoot still folding limply in mid-July on an inland or upland garden isn't behind; it just isn't there yet. Check again every week or two rather than forcingCovering plants to exclude light and speed early, tender growth in the dark, most associated with rhubarb and sea kale in late winter. Full definition → the date.

Taking the cutting

Choose a non-flowering shoot on a healthy plant, avoiding damaged, unhealthy or over-vigorous growth, and ideally one that has already passed the bend test rather than picking first and testing after. Work quickly once it's cut. First thing in the morning, when the plant is most hydrated after the cool night, is better than the afternoon heat, and clean, sharp secateurs matter throughout.

• Cut a length of 10 to 15cm, just below a leaf node.
• Remove the lowest leaves and the soft tip, leaving about four leaves (two pairs) at the top.
• If the remaining leaves are large, cut them in half to cut water loss while the cutting has no roots to replace it.
• For a shrub that is slow or reluctant to root, two techniques help. Wounding means shaving a thin sliver of bark about 2.5cm long from one side of the stem base. A heel cutting means pulling a sideshoot away from the main stem with a small strip of older wood attached, rather than cutting it cleanly. Box roots without either.
• Insert into free-drainingSoil that lets water pass through quickly rather than pooling, so roots aren't sitting in wet ground after rain. Full definition → cutting compost, a 50:50 mix of peat-free potting compost and sharp sand. Several cuttings can share one pot, spaced a couple of centimetres apart round the edge. Water in and let it drain fully.

Rooting and aftercare

Cuttings need a warm, light spot out of direct sun and humid air around the leaves while there are no roots to draw up water. A propagator lid, a clear plastic bag or a cold frame all do the job. Cuttings taken in summer seldom need bottom heat, but those taken in early autumn root faster with it.

Keep the compost moist but not waterlogged, and check regularly. Fungal mould and rot are the main way a batch is lost. Remove anything that has gone over, including fallen leaves, and vent the cover daily so the humid air doesn't turn stagnant. Once new growth shows or roots appear at the drainage holes, harden the cuttings off gradually over two to three weeks, opening the propagator or removing the cover for longer each day, before potting onMoving a plant into a larger pot as its roots fill the current one, giving it more room and fresh compost before it becomes pot-bound. Full definition →. Keep them somewhere sheltered from wind while they harden offGradually getting young plants raised indoors used to outdoor conditions over 7–14 days before planting out, so cold, wind and direct sun don't shock or damage them. Full definition →, since a small root system dries out fast in a breeze.

Slugs and snails go for soft young shoots and a freshly potted cutting hardening off outdoors is an easy meal. Growing it on a little longer in its pot before it goes somewhere more exposed is more reliable than barriers, and grit or copper rings around a pot don't stop slugs on their own.

A young cutting may not be hardy enough for a Scottish winter, whatever the parent shrub's own hardiness. In a cold frame, rooting may not finish until late spring the following year. A cutting rooted late in the summer is safest overwintered somewhere sheltered and frost-free or lightly protected (a cold frame, an unheated greenhouse, or a spot against a house wall) and planted out the following spring after a full growing season.

Four plants that suit this method, and why to take more than one

Lavender, rosemary, hebe and box all take from a semi-ripe cutting, judged by feel rather than by date.

H4 means hardy through most of the UK apart from inland valleys, at altitude and in central or northerly locations. That describes a lot of inland and upland Scotland, not just the mild coastal fringe, so rosemary and most garden hebes carry a real frost risk here that a southern reading of H4 wouldn't suggest. Lavender's H5 is safer on cold alone, though H5 plants can still struggle on exposed or northern sites. The more common way a Scottish lavender is lost is root rot in wet or heavy ground, which is about drainage rather than hardiness. Peat and gley soils are both poorly drained and together make up over 43% of Scotland's land area, and the RHS advises raised beds or containers for lavender where drainage is poor; see our lavender pruning and siting guide. Box, at H6, is safe from cold here. Box blight and box tree caterpillar are its real risks, and the caterpillar is present in Scotland as well as England, Wales and Ireland; the topiary basics guide covers both. A rooted spare costs little to grow on, and losing one cutting out of several matters far less than losing the only plant. The same logic applies to taking a rosemary cutting to replace an old, woody plant rather than nursing it back.

Box

In a heated propagator box can root in about eight weeks; in a cold frame or unheated greenhouse it takes closer to eight months. Pinch outRemoving the soft growing tip of a stem to stop upward growth and make the plant branch out sideways instead. Full definition → the shoot tips regularly once it is growing to keep it bushy. Plants are usually moved to a nursery bed in autumn, spaced 30 to 45cm apart, and need three to four years before a cutting is a garden-ready plant. That is a project for patience, not a quick fix for a gap in a hedge.

Hebe

Keep a rooted hebe on the dry side through its first sheltered winter. Of the four it is the one that rots faster than it struggles to root. New plants should flower within about two years.

Common questions

Sources