How to create new plants with layering
Layering — One of the Easiest and Most Reliable Ways to Propagate Garden Plants
Layering is one of the oldest and most reliable propagation techniques in the gardener’s toolkit. Unlike taking cuttings, which requires the new plant to develop roots while entirely separated from its parent, layering allows a stem to form roots while it is still attached to and being fed by the parent plant. The result is a much higher success rate, very little specialist equipment, and new plants that are strong and well-rooted from the moment they are separated. If you have never tried layering, early summer is an ideal time to start.
How Layering Works
The principle is straightforward. A young, flexible stem from the current or previous year’s growth is bent down to soil level, wounded slightly to encourage rooting, pegged into contact with the soil, and left in place while roots develop. The parent plant continues to feed the stem through its connection, which means the developing plant never faces the stress of having to survive on its own before it is ready. Once a good root system has formed — typically after several months — the new plant is severed from the parent and grown on independently.
There are several variations of the technique, each suited to different plants and situations.
Simple Layering
Simple layering is the most straightforward method and works for a wide range of shrubs and climbers. Choose a long, flexible stem from the current or previous year’s growth. About 30cm back from the tip, make a small wound in the underside of the stem — either a shallow cut or a twist that partially breaks the tissue — and dust lightly with hormone rooting powder if you have it, though this is not essential. Peg the wounded section into a shallow depression in the ground using a U-shaped pin or a forked stick, fill the depression with a mixture of compost and grit, and anchor the tip of the stem upright with a short cane. Water in and leave to root.
Depending on the plant, roots will form over a period of a few months to a year. Tug the stem gently after three to four months — resistance indicates roots are forming. Once well rooted, sever the connecting stem close to the parent plant and leave the new plant in place for a few more weeks before lifting and transplanting.
Serpentine Layering
Serpentine layering is a variation used for plants with long, flexible stems such as wisteria, honeysuckle, and climbing roses. Rather than pegging a single point of the stem into the ground, several points along the same stem are wounded and pegged in sequence — creating a serpentine wave — with each buried section potentially producing a separate rooted plant. This is an efficient way to produce multiple new plants from a single stem in one season.
Air Layering
Air layering is used when a stem cannot easily be bent to the ground — for example on larger shrubs, trees, or houseplants. A wound is made on the stem at the desired point, packed with moist sphagnum moss, and wrapped tightly in clear polythene film sealed at both ends. The moss retains moisture around the wound and roots develop within it over several weeks. Once roots are visible through the polythene, the stem is severed below the rooted section and the new plant potted up carefully. Air layering takes a little more preparation but has an excellent success rate on plants that resist other propagation methods.
Plants That Layer Particularly Well
Rhododendron and Azalea
Rhododendrons and azaleas are notoriously difficult to propagate from cuttings, but layer extremely well. Choose a young stem from the outer edge of the plant where it naturally arches close to the ground. Make a small upward-angling cut about halfway through the stem at a node, prop the cut open with a matchstick or small stone, dust with rooting hormone, and peg firmly into enriched, acidic soil. Rhododendrons are slow to root — allow 12 to 18 months — but the results are very reliable and the rooted plants are strong and vigorous from the start.
Magnolia
Magnolias are another plant where layering far outperforms other propagation methods for the home gardener. Low-growing branches on established trees and shrubs can be layered in late spring or early summer. The process is the same as for rhododendrons — wound, peg, and wait. Allow at least 12 months before checking for roots and a further growing season before separating. The new plants will be identical to the parent, which matters greatly with named magnolia varieties.
Wisteria
Wisteria produces long, vigorous stems that are ideal for serpentine layering. In summer, when new growth is long enough to reach the ground, peg multiple sections of a single stem into prepared soil along its length. Wisteria roots relatively quickly compared to woody shrubs — check after four to six months. New plants propagated this way will flower much sooner than wisteria grown from seed, which can take many years to bloom.
Climbing and Rambling Roses
Long, arching stems on climbing and rambling roses can be layered in exactly the same way as other shrubs. Choose a stem from the current year’s growth, wound it at a node, and peg it into enriched soil. Rose layers typically root within four to six months. This is a particularly useful technique for propagating old or named varieties that are no longer available commercially, or for filling gaps along a fence or wall with plants identical to an established climber nearby.
Honeysuckle
Honeysuckle layers with minimal effort — it sometimes roots where stems naturally touch the soil without any encouragement at all. To do it deliberately, peg a young stem at a node into compost-enriched soil and roots will usually form within a few months. Serpentine layering works very well with honeysuckle given the length of its flexible stems, allowing several new plants from a single layering session.
Forsythia
Forsythia is one of the easiest shrubs to layer. Its long arching stems naturally touch the ground and will often root spontaneously. To layer deliberately, simply peg a stem at a node without even wounding it — forsythia roots so readily that the wound is usually unnecessary. New plants will typically be well rooted within three to four months and can be separated and replanted elsewhere in the garden to extend a hedge or fill a bare area.
Viburnum
Many viburnum species layer reliably and are worth propagating this way given their cost to buy as mature plants. Viburnum davidii, V. tinus, and the deciduous viburnums all respond well. Choose stems from the current season’s growth and wound lightly before pegging into prepared soil. Allow six to twelve months for roots to develop.
Heather and Heaths
Heathers (Calluna) and heaths (Erica) can be layered very easily — in fact a technique sometimes called mound layering works particularly well. Pile compost over the centre of a mature heather plant in late spring, burying the lower portions of multiple stems simultaneously. By autumn, many of those buried stems will have rooted and can be separated and replanted. This is also a useful way to rejuvenate a mature, leggy heather that has become bare at the centre.
Blackberries and Hybrid Berries
Blackberries, loganberries, and tayberries layer by tip layering — a variation where the growing tip of a long cane is pushed directly into the soil in late summer. The tip naturally roots and produces a new shoot the following spring. This is how blackberries spread naturally in the wild, and harnessing this tendency deliberately is a very simple way to produce new fruiting plants at no cost.
Magnolia and Camellia by Air Layering
Where stems on mature camellias and magnolias cannot reach the ground, air layering is the answer. Select a healthy stem of pencil thickness or greater from the previous year’s growth, remove leaves from a 10cm section, make a wound or remove a ring of bark, pack tightly with wet sphagnum moss, and seal in clear polythene. Roots typically appear within eight to twelve weeks during the growing season. Camellias can be difficult to root from cuttings, making air layering a particularly valuable technique for propagating named varieties.
Tips for Success
- Timing — Late spring and early summer are the best times for most layering, as the plant is in active growth and root formation is at its most vigorous. Air layering can be done successfully into midsummer.
- Soil preparation — Prepare the spot where you will peg the stem by incorporating compost and a little horticultural grit to improve drainage. Roots need air as well as moisture.
- Keep it moist — Water the layered section during dry spells. Dry conditions significantly slow root development.
- Be patient — Layering is not a quick technique. Most woody plants will need between six months and eighteen months to produce a well-rooted plant. Resist the temptation to check or disturb the layer too early.
- Sever gradually — Once roots are confirmed, sever the connecting stem in stages over two to three weeks rather than all at once. This helps the new plant adjust to independence gradually and reduces transplant shock.
- Label everything — Mark layers with a plant label noting the date and variety. It is surprisingly easy to forget where you pegged a layer six months later.
Layering asks very little of the gardener but delivers reliably. It is the ideal technique for plants that are slow or difficult to root from cuttings, for propagating valuable or rare named varieties, and for anyone who wants a near-certain result with minimal intervention. Try it this summer and you will almost certainly have new plants ready to move to their permanent positions by the following spring.
