Plant propagation: free plants from cuttings, division and more

Buying plants is expensive. Propagating them is almost free. Once you learn a few basic techniques, you'll look at every plant in the garden as a potential source of new ones — and the urge to buy will quietly fade.

Why propagate your own plants

The most obvious reason is cost. A single parent plant can yield dozens of offspring over a season, all genetically identical to the original — which matters when you've found a particular colour, scent or habit you want to keep. Buying named varieties from nurseries gets expensive quickly; propagating your own sidesteps that entirely.

There's also a sustainability argument. Commercially produced plants require glasshouse energy, plastic pots, peat-heavy compost (though this is changing) and road miles. Propagating at home uses what you already have, with minimal inputs. Peat-free mixes made partly from your own home compost close the loop further.

And then there's the pleasure of it. Watching a cutting root and unfurl its first new leaf is genuinely satisfying — arguably more so than unwrapping a plant bought in a shop.

Stem cuttings: softwood and hardwood

Stem cuttings are the most widely used propagation method and work for an enormous range of shrubs, perennials and herbs. The basic idea is the same each time: take a piece of stem, remove the lower leaves, and persuade it to grow roots before it dries out.

The difference between cutting types is simply the maturity of the stem at the time of taking:

• Softwood cuttings are taken in late spring and early summer from the fresh, sappy new growth at the tips of shoots. The stem bends easily and snaps cleanly. This is the fastest-rooting type — many softwood cuttings produce roots within two to four weeks under the right conditions. Good candidates include pelargoniums, salvias, fuchsias, dahlias, penstemons and most herbs.
• Semi-ripe cuttings come later in summer, once the base of the new season's growth has started to firm and go slightly woody while the tip is still soft. Many shrubs — including lavender, rosemary, ceanothus and many evergreens — propagate best this way.
• Hardwood cuttings are taken in autumn or winter from fully woody, dormant stems. They are the slowest to root but the most forgiving — you can simply push them into a slit in the ground outdoors and leave them. Roses, willows, dogwoods (Cornus), forsythia and currant bushes are classic hardwood cutting plants. Many will root without any special fuss over winter and be ready to pot or plant out the following spring.

A good stem cutting is typically 8–12 cm long, has at least two leaf nodes, and is cut cleanly just below a node (the slight swelling where a leaf joins the stem). Remove all leaves from the lower half of the cutting so no foliage is buried or resting against the compost, where it would rot.

1. Choose a healthy, non-flowering shoot. Flowering stems put energy into blooms, not roots. If a stem has flower buds, pinch them off before taking the cutting or choose a different shoot.
2. Cut cleanly just below a leaf node. Use a sharp, clean blade — a blunt or dirty knife crushes tissue and introduces disease. Make a straight cut for softwood; a slight angled cut is sometimes used for hardwood cuttings.
3. Remove the lower leaves. Strip off any leaves that will sit below compost level, leaving only two or three at the top. Large leaves can be reduced by half with scissors to cut water loss.
4. Dip the cut end in hormone rooting powder or gel (optional but helpful). Shake off any excess. This step is not essential — many plants root freely without it — but it does improve strike rates on trickier subjects.
5. Insert into free-draining compost. A mix of roughly half peat-free multipurpose compost and half perlite or sharp sand drains well enough to prevent rot while still holding some moisture. Make a hole with a pencil or stick before inserting the cutting so you don't scrape off the hormone powder.
6. Water in gently and enclose in humidity. Place a clear plastic bag loosely over the pot, or put it in a propagator. This keeps the air around the leaves moist so the cutting doesn't wilt before roots form. Keep out of direct sunlight — bright but indirect light is ideal.
7. Check for rooting after a few weeks. A gentle tug that meets resistance usually means roots have formed. Alternatively, look for new leaf growth, which is the most reliable sign. Once rooted, gradually ventilate by opening the bag a little more each day before removing it entirely.

Leaf cuttings for houseplants

Some plants — particularly succulent or fleshy-leaved houseplants — can be propagated from a single leaf rather than a stem. This is one of the techniques that makes indoor plant growing so addictive. A single healthy leaf can produce multiple new plants with almost no effort.

The method varies by plant type:

• Succulents (echeveria, sedum, crassula): gently twist a firm, healthy leaf away from the stem with a slight wiggle, making sure it comes away cleanly with the base intact. Lay it on top of barely moist, gritty compost — do not bury it. Within a few weeks, tiny rosettes will appear at the base. Do not overwater.
• Sansevieria (snake plant): cut a healthy leaf into sections roughly 5–8 cm long. Insert them upright into compost in the same orientation they grew (they will not root if upside down). Keep them barely moist and warm.
• Streptocarpus and African violets: cut a healthy leaf into horizontal strips or take the whole leaf with its stalk. Insert the stalk section into compost and keep humid. Plantlets form along the cut edge over several weeks.
• Begonias: take a whole mature leaf, make shallow cuts across the main veins with a sharp blade, then lay it face down on moist compost. Pin it flat with a small stone or bent wire. Plantlets form at the cut points.

For a comprehensive guide to caring for the houseplants you're propagating, see our indoor plants guide.

Division of established clumps

Division is the simplest propagation method of all — no special equipment, no rooting time, no humidity to manage. You simply dig up an established clump of a perennial plant, split it into smaller sections, and replant. Each section already has roots and will establish quickly.

Most clump-forming perennials benefit from being divided every few years in any case, as the centre of an old clump can become congested and flower less freely. Division rejuvenates the plant and gives you multiple new ones in the process.

Good candidates for division include hostas, daylilies (hemerocallis), crocosmia, ornamental grasses, liriope, rudbeckia, echinacea, primulas and most border perennials. Timing varies by climate and species, but a useful general rule is to divide spring- and summer-flowering plants in early autumn, and autumn-flowering plants in spring. Avoid dividing plants when they are in flower or during drought.

Small clumps can be pulled apart by hand. Larger or more congested ones may need two garden forks pushed back-to-back through the centre and levered apart, or a sharp spade to cut through. Make sure each division has both roots and healthy shoots. Replant at the same depth, water well, and keep moist for the first few weeks.

Layering, offsets and runners

Several plants make it even easier by doing most of the propagation work themselves:

• Layering: many shrubs with flexible stems — including forsythia, magnolia, rhododendron and climbing roses — can be persuaded to root while still attached to the parent plant. Bend a low, flexible stem down to the ground, wound the underside slightly (scrape a small section of bark away), peg it into contact with moist compost in a pot or directly into the soil, and weight it down with a stone. Leave it for several months; once it has rooted, cut it free from the parent and grow it on.
• Offsets: some plants produce small plantlets (offsets or pups) at their base — aloes, agaves, bromeliads and many ornamental grasses produce them regularly. Wait until the offset is a reasonable size with its own small root system before carefully separating it from the parent. Pot it into its own container and treat as a new plant.
• Runners: strawberries are the classic example — horizontal stems (runners) trail across the ground and produce new plantlets at intervals. Pin a runner's plantlet into a small pot of compost while still attached to the parent, wait for it to root (usually a few weeks), then sever the runner. Spider plants (Chlorophytum) do the same thing indoors. This is propagation that practically does itself.

What you need

You do not need much to propagate successfully. A few clean, sharp tools and basic materials cover most situations.

• Clean, sharp blade: a pruning knife, craft knife or clean secateurs. Sharp cuts are cleaner and heal more readily than ragged ones from blunt tools. Clean the blade with alcohol or a dilute disinfectant between plants to avoid carrying disease.
• Small pots: reuse plastic pots you already have rather than buying new ones. Clean them thoroughly before use — old compost can harbour fungal disease.
• Peat-free compost: a multipurpose mix blended with perlite or sharp sand for extra drainage. Your own home compost, sieved fine, can make a good component of a propagating mix — though avoid anything too rich for very early-stage cuttings, which prefer lean conditions.
• Clear plastic bags or a propagator: maintaining humidity around cuttings is important, especially in a warm, dry room. A simple plastic bag secured over the pot with a rubber band works perfectly well.
• Labels: always label cuttings with the plant name and the date taken. Memory is unreliable and pots of small cuttings look remarkably similar.

Aftercare: humidity, light and watering

The critical period for cuttings is the gap between being taken and forming roots. During this time, the cutting has no way to replace the water it loses through its leaves — which means it can wilt and die before rooting ever happens. Managing this is the core of successful cutting aftercare.

• Humidity: enclosing cuttings in a clear bag or propagator keeps the air around the leaves moist and dramatically reduces water loss. Check regularly for condensation — if the bag is soaking wet inside, ventilate slightly. You want humidity, not waterlogging.
• Light: bright, indirect light is ideal. Direct sun through glass or plastic can cook unrooted cuttings very quickly. A bright windowsill away from direct afternoon sun, or a bench in a shaded greenhouse, is a good spot. Once rooted, gradually introduce more light.
• Temperature: most cuttings root better with gentle bottom heat — a heated propagator or even placing pots on a warm surface helps. Cool, cold conditions slow rooting significantly. Hardwood cuttings are an exception — they are designed to survive winter cold and need no warmth.
• Watering: keep the compost just moist, not wet. A dry cutting dies; a waterlogged one rots at the base. Water from below where possible by standing the pot in a shallow tray of water for a short time, then allowing it to drain fully. This keeps the stem base drier and reduces the risk of rot.
• Potting on: once cuttings are clearly rooted and producing new growth, pot them into individual containers of richer compost and grow them on before planting out. Harden off plants raised indoors before moving them outside permanently — a week or two of increasing outdoor exposure helps.

Easiest plants to start with

If you are new to propagation, some plants will give you confidence quickly. Success rates are genuinely high with the right subjects — and honest expectations help.

• Mint and other soft herbs: almost foolproof. A sprig of mint in a glass of water will root in a week or two. Basil, lemon balm and marjoram are similarly easy in compost.
• Pelargoniums (geraniums): softwood cuttings root reliably in late summer or early autumn — a good way to preserve plants before winter if you don't have frost-free space for the whole plant.
• Forsythia, dogwood and willow: hardwood cuttings pushed into the ground in autumn rarely fail. These shrubs almost want to root.
• Hostas and daylilies: division in spring or autumn is simple, quick and very reliable. Both plants actively benefit from being divided every few years.
• Strawberries: pin a runner plantlet into a pot while still attached to the parent, wait a few weeks, snip, and you're done.
• Sedums and echeverias: leaf cuttings that need almost no attention — lay on dry compost and wait.

A realistic success rate for softwood cuttings from easy plants is around half to three-quarters of what you attempt — better with practice and attention to hygiene. Hardwood cuttings of shrubs like willows are higher. Trickier subjects — conifers, some magnolias, certain evergreens — may be lower, even for experienced propagators. Taking several cuttings from each plant is sensible insurance.

• Blade and pots cleaned before use.
• Cutting taken from healthy, non-flowering growth at the right time of year for the method.
• Lower leaves removed; no foliage buried or touching the compost surface.
• Compost is free-draining — mixed with perlite or sharp sand.
• Cutting labelled with plant name and date.
• Humidity maintained with a bag or propagator; position in bright, indirect light.
• Compost kept just moist — not dry, not waterlogged.
• Rooted cuttings potted on and hardened off before planting outside.