Raspberries are one of the easier fruit plants to propagate at home, and stem cuttings are a reliable way to do it. The method you choose depends largely on what type of raspberry you’re growing and what time of year you’re starting. Red raspberries, black raspberries, and purple varieties each respond best to slightly different techniques, but all can produce strong new plants within a single growing season.
Which Method Fits Your Raspberry Type
Not all raspberries propagate the same way. Red raspberries naturally send up new shoots (called suckers) from their root systems, which makes them easy to divide. But if you want to grow new plants from cuttings rather than divisions, softwood stem cuttings taken in late spring or early summer work well for red varieties.
Black raspberries behave differently. Their long, arching canes naturally bend toward the ground, and where the tip touches bare soil, it roots on its own. This is called tip layering, and black raspberries do it so readily that many growers consider it the primary propagation method for these varieties. You can encourage the process by bending a vigorous first-year cane to the ground and pinning the tip down with a landscape staple, brick, or rock. Within several weeks, roots form at the buried tip and a new shoot emerges. Purple raspberries, which are a cross between red and black types, also respond well to tip layering.
If you specifically want to use stem cuttings rather than tip layering, softwood cuttings are the most accessible option for home growers. Hardwood cuttings taken during dormancy can also work, but they root less reliably without a controlled propagation setup.
When to Take Softwood Cuttings
Timing matters more than almost any other variable. Softwood cuttings need to come from new growth that’s still flexible but has started to firm up slightly. In most climates, this window opens in late May or June. If you’re in a northern state or at higher elevation, the window shifts later, sometimes into early July. The wood should snap cleanly when bent rather than just folding over (too young) or splintering (too old and woody).
By midsummer, most deciduous plants including raspberries have hardened off their new growth, and the window for softwood cuttings closes. If you miss it, tip layering in late summer is a good fallback for black and purple types.
Taking and Preparing the Cuttings
Choose healthy, disease-free canes from a vigorous plant. This is worth being selective about, because raspberries are susceptible to several viruses that spread through vegetative propagation. If a plant shows stunted growth, yellowed or mottled leaves, or crumbly fruit, don’t use it as a source. Clean your pruning shears with rubbing alcohol or a diluted bleach solution (one part household bleach to nine parts water) before and between cuts to avoid transferring pathogens.
Cut 4- to 6-inch sections from the tips of new-season canes, each with at least two or three sets of leaves. Make the bottom cut just below a leaf node, which is where the leaves attach to the stem. This node is where new roots will form. Inside raspberry stems, specialized cells near the nodes can reprogram themselves into root-forming tissue when conditions are right, so positioning that node at or just below the soil line is essential.
Strip the leaves from the lower half of the cutting, leaving two or three leaves at the top. Those remaining leaves drive photosynthesis to fuel root growth, but too many leaves pull moisture out of the cutting faster than it can absorb water without roots.
Using Rooting Hormone
Rooting hormone isn’t strictly required for raspberries, but it noticeably improves results. Research on bramble cuttings (the family that includes both raspberries and blackberries) shows that cuttings treated with rooting hormone consistently develop better root systems than untreated ones. The effect varies by variety, but across multiple cultivars, treated cuttings outperformed controls.
For home propagation, a standard powdered rooting hormone from any garden center works fine. Dip the cut end of the stem into the powder, tap off the excess, and insert it into your growing medium. Gel formulations also work well and tend to coat the stem more evenly. You don’t need professional-grade concentrations for raspberries to respond.
The Right Growing Medium
Drainage is the single most important quality in a propagation mix. Cuttings that sit in waterlogged soil rot before they root. A good all-purpose mix for raspberry cuttings is one part perlite or pumice, one part finely ground bark, and two parts potting soil. This holds enough moisture to keep cuttings hydrated while letting excess water drain quickly. You can simplify this to a 50/50 blend of perlite and peat moss if that’s what you have on hand.
Use small pots or cell trays with drainage holes. Insert each cutting about two inches deep, firm the mix around it gently, and water thoroughly.
Keeping Cuttings Alive While They Root
The biggest challenge with softwood cuttings is preventing them from drying out before roots develop. Without roots, the cutting has no way to replace the moisture it loses through its leaves. You need to create a humid environment around the cuttings while still allowing some air circulation to prevent fungal problems.
The simplest approach is to place a clear plastic bag loosely over each pot or set of pots, supported by sticks or stakes so the plastic doesn’t rest directly on the leaves. This creates a mini greenhouse effect. Open or lift the bag for a few minutes daily to let fresh air in. A propagation tray with a clear humidity dome serves the same purpose with less fuss.
Place cuttings in bright, indirect light. Direct sun will overheat the space inside the plastic and cook the cuttings. A spot that gets morning light and afternoon shade, or a bright area under a tree canopy, works well. If you’re propagating indoors, a north-facing window or a position a few feet back from a bright window is ideal. Keep the growing medium consistently moist but not soggy. Misting the leaves every day or two helps bridge the gap until roots establish.
Temperatures between 65°F and 75°F (18°C to 24°C) encourage the fastest rooting. Cuttings taken in June often benefit from naturally warm ambient conditions, but avoid placing them in locations that get extremely hot, like against a south-facing wall or inside a closed cold frame in summer.
How Long Rooting Takes
Most raspberry softwood cuttings begin producing roots within three to four weeks under good conditions. You can check by gently tugging the cutting after a few weeks. If you feel resistance, roots are forming. Avoid pulling the cutting out of the soil to look, as this damages fragile new roots.
Once cuttings are well rooted (typically six to eight weeks after sticking), gradually remove the humidity cover over several days to harden them off. Transplant rooted cuttings into larger individual pots and grow them on for the rest of the summer before planting them in their permanent location in fall or the following spring.
Tip Layering Step by Step
If you’re growing black or purple raspberries, tip layering is often easier than cuttings and has a higher success rate. In late summer, select a long, healthy first-year cane and bend its tip to the ground. Dig a small hole about 3 to 4 inches deep, bury just the tip of the cane, and hold it in place with a U-shaped landscape staple or a heavy stone. Cover with soil and water well.
Within several weeks, the buried tip develops roots and sends up a new vertical shoot. By the following spring, you can sever the new plant from the parent cane and transplant it. This method produces a larger, more robust starter plant than most cuttings because the new plant draws energy from the parent while establishing its own root system.
Transplanting New Plants
Whether you propagated by cuttings or tip layering, young raspberry plants establish best when transplanted into well-drained soil with plenty of organic matter. Space them 2 to 3 feet apart in rows. Water deeply after planting and mulch around the base to retain moisture and suppress weeds. New plants typically won’t produce a meaningful harvest until their second year in the ground, so focus the first season on building strong root systems and healthy canes.
One healthy, established raspberry plant can provide enough material to propagate five to ten new plants each year, so even starting with a small patch, you can scale up quickly.