Rooting Hardwood Cuttings: Figs, Mulberries, Grapes (Zones 5-9)

Quick answer: Rooting fig, mulberry, currant, and grape hardwood cuttings in USDA zones 5-9 during winter is reliable for figs, currants and grapes; mulberry is more variable, with black mulberry (Morus nigra) notably hard to root from hardwood. This involves collecting dormant wood, applying rooting hormone, and providing a consistent, warm, and humid environment for root development.

In many parts of the United States, from the fertile valleys of California to the humid climates of the Southeast, propagating woody plants from hardwood cuttings offers a cost-effective and reliable method for expanding your garden or orchard. For growers in USDA zones 5 through 9, winter is an opportune time to take dormant cuttings from favorite figs, mulberries, currants, and grapes. One caveat on currants: Ribes species are an alternate host for white pine blister rust, and a number of states still restrict which Ribes may be planted, moved or sold. Check your state agriculture department's current list before you propagate or share them. This technique, when executed correctly, is reliable for figs, currants and grapes, providing you with genetically identical copies of your desired plants without the expense of purchasing new nursery stock.

This method leverages the plant’s natural dormancy, allowing cuttings to focus energy on root development before the demands of spring growth. By understanding the specific requirements for collecting, preparing, and rooting these cuttings, you can transform a handful of dormant branches into dozens of new, thriving plants. This approach not only saves money—a nursery-bought tree costs many times what a cutting does—but also ensures the preservation of specific cultivars that perform well in your local climate.

Why choose hardwood cuttings for propagation?

These takeaways points carry into this section, too.

Propagating plants from hardwood cuttings offers several compelling advantages for the home grower, particularly when dealing with species like figs, mulberries, currants, and grapes. First, it provides genetic exactness; each new plant is a 100% clone of the parent, ensuring that desirable traits like fruit quality, disease resistance, or cold hardiness are faithfully reproduced. This is a significant benefit compared to growing from seed, which can result in genetic variation. Second, it is remarkably cost-effective. A single mature plant can provide dozens of cuttings, each with the potential to become a new plant, effectively cutting your plant acquisition costs to little more than the price of a bag of rooting medium, compared with buying potted nursery stock. Third, it allows for the expansion of existing plants or sharing older, unpatented varieties with other growers, fostering community resilience and biodiversity in local food systems. Do check before you propagate a modern named cultivar: many are covered by US plant patents or plant variety protection, which restrict asexual propagation even for non-commercial use. For instance, a well-established ‘Brown Turkey’ fig in USDA zone 7 can easily supply 20-30 viable cuttings each winter.

The benefits of cloning your favorite plants

The ability to clone plants ensures that the characteristics you value most are passed on directly. This is especially important for fruit-bearing plants where specific flavors, yields, or ripening times are critical. For example, if you have a ‘Concord’ grape vine that consistently produces 15-20 pounds of high-quality fruit per season in your USDA zone 6 vineyard, propagating it via hardwood cuttings guarantees that new vines will exhibit the same performance. This method is also less labor-intensive than grafting for many species and often has a higher success rate than softwood cuttings for certain woody plants, especially when taken during their deep dormancy period. The process also allows for creating a diverse home orchard or food forest, a practice supported by resources like the USDA National Agroforestry Center [4].

• Ensures genetic fidelity, producing exact copies of the parent plant.
• Significantly reduces costs, potentially saving hundreds of dollars annually.
• Allows for rapid multiplication of desirable plant varieties.
• Bypasses the variability and longer maturation times associated with seed propagation.
• Utilizes dormant wood, which is often more robust and less prone to wilting than softwood.

Timing and collecting your cuttings

That work on why choose hardwood sets up what follows here.

The success of hardwood cutting propagation hinges significantly on proper timing and collection. Cuttings should be taken when the parent plant is fully dormant, typically in late fall after leaf drop or in late winter before bud swell, but after the coldest temperatures have passed. In USDA zone 6, this often means collecting cuttings between late January and early March. The wood should be mature, firm, and healthy, usually from the previous season’s growth, which will be about 0.25 to 0.5 inches in diameter—roughly the size of a pencil. Avoid wood that is too thin, diseased, or damaged. For example, a healthy ‘Black Mission’ fig tree in central California (USDA zone 9) can provide dozens of suitable branches from its one-year-old growth.

Best practices for collecting and storing cuttings

When collecting, use sharp, clean bypass pruners to make clean cuts, minimizing damage to both the parent plant and the cutting. Select branches that are straight and vigorous, avoiding those with lateral branches or signs of stress. Once collected, bundle the cuttings and label them immediately with the plant type and date. If you’re not preparing them right away, store them in a cool, moist environment to prevent desiccation. Wrapping the bundles in damp newspaper or peat moss and placing them in a plastic bag in a refrigerator at 35-40°F can keep them viable for several weeks. Some growers in colder regions, like USDA zone 4, might store cuttings in a root cellar or unheated garage where temperatures remain consistently low but above freezing, ensuring the wood stays dormant until ready for processing. This temporary storage method is critical for maintaining the cuttings’ vitality until you are ready to begin the rooting process, which usually takes 4-8 weeks.

• Collect cuttings from dormant plants in late winter before bud break.
• Choose healthy, one-year-old wood, 0.25 to 0.5 inches in diameter.
• Use sharp, sterilized bypass pruners for clean cuts.
• Label bundles immediately with plant variety and collection date.
• Store cuttings wrapped in damp material in a cool, dark place at 35-40°F if not used immediately.

Preparing and treating cuttings for rooting

Once collected, preparing your hardwood cuttings correctly is paramount for successful rooting. Each cutting should be 6 to 12 inches long and possess at least three to four nodes, which are the points on the stem where leaves or buds were attached. Make a straight cut just above the top node and a slanting cut about 0.5 to 1 inch below the bottom node. The slanting cut helps you remember which end is up and provides a larger surface area for water absorption and root emergence. For species like grapes, ensuring at least two nodes are buried in the rooting medium is crucial for root development. Some growers in the Pacific Northwest (USDA zone 8) even recommend making a small, 1-inch wound by scraping a thin strip of bark from the bottom of the cutting on one side; this can encourage more vigorous root formation.

Applying rooting hormones for increased success

Rooting hormones improve both the percentage of cuttings that root and the uniformity of the root systems that form, particularly on species that are slow to root without help. The most common active ingredient is indole-3-butyric acid (IBA), typically used in concentrations ranging from 0.1% to 0.8% for hardwood cuttings. Dip the bottom 1 inch of the prepared cutting into the rooting hormone powder or liquid solution, ensuring even coverage. Tap off any excess to prevent over-application, which can sometimes inhibit rooting. Figs root readily from hardwood cuttings and many growers get good results with no hormone at all; if you use one, a standard commercial hardwood-strength IBA preparation is sufficient. After treatment, cuttings should be immediately placed into their rooting medium to prevent the hormone from drying out or becoming ineffective. This step is a small investment that yields substantial returns in terms of viable plants.

• Cut cuttings 6-12 inches long with 3-4 nodes.
• Make a straight cut above the top node and a slanting cut below the bottom node.
• Optionally wound the bottom 1 inch of the cutting by scraping bark.
• Dip the bottom 1 inch into a rooting hormone (0.1-0.8% IBA).
• Ensure even coverage and tap off excess hormone before planting.

Rooting medium and environmental conditions

This builds directly on preparing and treating.

The choice of rooting medium is critical for providing the necessary support, moisture, and aeration for root development. A sterile, well-draining mix that retains some moisture is ideal. A common and effective blend is a 50:50 mixture of coarse perlite and peat moss, or coco coir. Perlite ensures excellent drainage and aeration, preventing waterlogging and fungal issues, while peat moss or coco coir holds moisture. Avoid heavy garden soil, which can compact and suffocate developing roots. Containers need ample drainage holes and, more importantly, enough depth to bury at least two nodes on a 6-to-12-inch cutting — deep tree pots, tall root trainers, or 1-gallon nursery pots all work. Standard seed-starting cells are far too shallow for hardwood cuttings and should not be used.

Creating the optimal rooting environment

Maintaining consistent environmental conditions is key to success. Bottom heat is particularly beneficial for hardwood cuttings, because warming the base drives root formation while the buds above stay cold and dormant. The cold half matters as much as the warm half: keep the tops in genuinely cool air — an unheated garage, a basement, or a cold frame — rather than in a warm room, or the buds will break before any roots form. Aim for a bottom heat temperature between 65-75°F, which can be achieved using a seedling heat mat. This is especially important for growers in colder climates like USDA zone 5, where ambient indoor temperatures might be too low. High humidity around the cuttings also helps prevent desiccation. Covering trays with a clear plastic dome, or even a plastic sheet supported by stakes, can create a mini-greenhouse effect, maintaining humidity levels around 70-90%. While cuttings do not require intense light during the initial rooting phase, providing indirect light or low-intensity grow lights for 12-16 hours a day can be beneficial once buds begin to swell. You can find suitable propagation trays at agripure.org/shop/24-well-plastic-seedling-pot-succulent-sowing-seedling-box-insulated-seedling-tray.

• Use a sterile, well-draining rooting medium like 50% perlite and 50% peat moss.
• Ensure containers have adequate drainage holes to prevent waterlogging.
• Provide consistent bottom heat between 65-75°F using a heat mat.
• Maintain high humidity (70-90%) with a clear plastic dome or cover.
• Offer indirect light or low-intensity grow lights for 12-16 hours daily.

Care during rooting and transplanting

Those rooting medium and habits matter here as well.

During the rooting period, which typically lasts 4 to 8 weeks, consistent care is essential. The rooting medium should be kept consistently moist but never waterlogged. Overwatering can lead to fungal diseases like damping-off, which can quickly destroy an entire batch of cuttings. Check the moisture level daily by feeling the top inch of the medium. If it feels dry, water gently from the top or bottom. For example, in a 24-cell tray, you might need to add about 0.5 cups of water every other day, depending on the ambient humidity. As roots begin to form, you may notice new leaf growth appearing on the cuttings. While exciting, this top growth can sometimes outpace root development, so continued vigilance over moisture and temperature is important.

Hardening off and planting out rooted cuttings

Once cuttings have developed a robust root system—usually 1 to 2 inches long and visible through the drainage holes or when gently tugged—they are ready for the next stage. Before planting them directly outdoors, it is crucial to harden them off. This process gradually acclimates the young plants to outdoor conditions, including direct sunlight, wind, and fluctuating temperatures. Over a period of one to two weeks, move the rooted cuttings outdoors for increasing durations each day, starting with a few hours in a shaded, protected spot and gradually increasing exposure to sun and wind. After the last expected frost date in your region (e.g., mid-May in USDA zone 6), and once they are fully hardened, transplant the young plants into their permanent location in the garden or into larger pots. Ensure the planting hole is twice as wide as the root ball and backfill with native soil, watering thoroughly after planting. For more general advice on starting plants, refer to agripure.org/articles/seed-starting-for-beginners.

• Keep rooting medium consistently moist but avoid waterlogging.
• Do not read new leaf growth as proof of rooting — hardwood cuttings routinely push leaves from stored reserves and then collapse. Check for roots directly, by looking at the drainage holes or by feeling for resistance on a gentle tug.
• Begin hardening off rooted cuttings for 1-2 weeks before outdoor planting.
• Gradually expose plants to outdoor conditions, starting with shade and increasing sun.
• Transplant into the garden after the last frost, ensuring adequate spacing and initial watering.

High Success Rate: Hardwood cuttings of figs, currants, and grapes root reliably with proper technique and environmental control; mulberry is more variable, and black mulberry (Morus nigra) is notably hard to root from hardwood.

Cost Savings: Propagating from cuttings costs little more than the medium you root them in, compared with buying nursery stock.

Optimal Temperature: Maintaining bottom heat between 65-75°F is crucial for encouraging rapid and robust root development in hardwood cuttings.

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Frequently asked questions

What is the best time to take hardwood cuttings?

The best time to take hardwood cuttings is during the dormant season, typically in late fall after leaf drop or in late winter before bud swell. For most of the US, this window is from November to March, ensuring the plant’s energy is focused on root development.

How long should hardwood cuttings be?

Hardwood cuttings should generally be 6 to 12 inches long, ensuring they contain at least three to four nodes. This length provides sufficient stored energy and surface area for successful rooting.

Do I need rooting hormone for hardwood cuttings?

While not strictly necessary for all species, using a rooting hormone, especially one containing 0.1-0.8% IBA, improves both the percentage of hardwood cuttings that root and the uniformity of the roots they form.

What kind of soil mix is best for rooting?

A sterile, well-draining rooting medium is best, such as a 50:50 mix of coarse perlite and peat moss or coco coir. This blend provides optimal aeration and moisture retention for new roots.

How long does it take for hardwood cuttings to root?

Hardwood cuttings typically take 4 to 8 weeks to develop a sufficient root system, depending on the species, environmental conditions, and the use of bottom heat at 65-75°F.

When can I plant rooted cuttings outdoors?

Rooted cuttings should be hardened off for one to two weeks before being planted outdoors after the last expected frost date in your specific USDA zone, usually in late spring.

References

1. USDA Natural Resources Conservation Service (2024). USDA Natural Resources Conservation Service.
3. SARE — Sustainable Agriculture Research & Education (2023). SARE — Sustainable Agriculture Research & Education.
4. ATTRA / NCAT Sustainable Agriculture (2023). ATTRA / NCAT Sustainable Agriculture.
5. USDA National Agroforestry Center (2023). USDA National Agroforestry Center.