Question

How do you take a cutting, and what are the different types?

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Answer

By removing a piece of stem and inducing it to produce roots — and the type of cutting is determined by how mature the wood is, which in turn determines when you take it and how you treat it.

Why it works. Many plants can regenerate an entire plant from a stem section, because cells near the cut can dedifferentiate and form roots. The resulting plant is a clone, genetically identical to the parent — which is why cuttings are used for named cultivars that would not come true from seed.

Softwood cuttings. Taken in late spring to early summer from the current season's soft, flexible growth.

Fastest to root, and the most likely to wilt — the soft material has no reserves and loses water rapidly, so they need high humidity, a propagator or a covered environment, and speed between cutting and potting.

Semi-ripe cuttings. Taken in mid to late summer, when the base of the current season's growth has begun to firm while the tip is still soft. More robust than softwood, slower to root, and suitable for many shrubs and evergreens.

Hardwood cuttings. Taken in autumn to winter from fully dormant, woody stems. The easiest and least demanding — simply inserted into a trench or a pot outdoors and left, with no humidity control required. Slow, taking months, and ideal for currants, willows, roses and many deciduous shrubs.

Root cuttings and leaf cuttings apply to specific plants.

The method, in outline:

Take material in the morning from healthy, non-flowering shoots.

Cut just below a node, where rooting hormones concentrate naturally.

Remove the lower leaves and reduce remaining leaf area by half on large leaves, to limit water loss.

Rooting hormone helps for difficult subjects and is unnecessary for easy ones.

Insert into free-draining compost — gritty, low in nutrients, since roots seek nutrients rather than sitting in them.

Keep humid and out of direct sun, and do not let the compost dry or become waterlogged.

Resist pulling them up to check.

Plant Breeders' Rights may prohibit propagating protected cultivars for distribution.

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