Cedar trees, known for their distinct aroma and evergreen foliage, can be propagated through cuttings. This method creates new plants genetically identical to the parent, allowing gardeners to reproduce specific varieties that may not grow true from seed. Propagating cedar from cuttings can expand a garden or landscape.
Best Time to Take Cedar Cuttings
The best time to take cedar cuttings is generally late summer, early fall, or early spring, when trees are concluding or beginning active growth. Cuttings taken from late autumn to early winter during dormancy can also be effective, as this period reduces stress on the parent plant and directs energy toward root formation.
For white cedar, summer is suitable after new growth has slightly hardened, as semi-hardwood cuttings have a higher success rate. Hardwood cuttings, taken when the tree is dormant in late fall, winter, or early spring, are another option but may root more slowly. Take cuttings in the early morning to avoid heat stress.
Taking and Preparing Cedar Cuttings
Select healthy, semi-hardwood branches from a mature cedar tree. These branches should be flexible but not overly soft, indicating a stage of growth suitable for root development. Look for new growth stems, typically 4 to 6 inches long, though some varieties may benefit from 6 to 8 inches containing several leaf nodes.
Make a clean cut at a 45-degree angle just below a leaf node using sharp pruners or a sharp knife. This angled cut increases the surface area for rooting and encourages better absorption of rooting hormone. Remove the foliage from the bottom half of the cutting, leaving a few leaves at the top to support photosynthesis. Removing lower leaves helps the cutting focus its energy on root production rather than sustaining excess foliage.
After preparing the cutting, dip the cut end into a rooting hormone. This hormone stimulates faster and more robust root formation, significantly increasing the chances of successful propagation. Gently tap off any excess hormone before planting.
Rooting Cedar Cuttings
A well-draining rooting medium is essential for successful rooting, preventing waterlogging and promoting healthy root development. Suitable mediums include a mixture of moist soil and perlite, or a blend of one part peat to one part perlite. A light, well-draining propagation mix provides necessary aeration and moisture balance.
Insert the treated cutting into the rooting medium, making a hole with a pencil to avoid scraping off the rooting hormone. Gently firm the medium around the stem to ensure good contact. Cedar cuttings root best in stable temperatures, avoiding extremes that can hinder root formation. Maintaining a consistent root zone temperature, possibly with a heat mat during cooler months, can enhance the rooting process.
Humidity is important for preventing moisture loss from the leaves while roots are developing. Covering the cutting and pot with a clear plastic bag or a humidity dome helps create a stable, humid environment. Regular misting, often daily or every other day, keeps the cutting hydrated, but avoid overwatering to prevent root rot. Place the setup in partial shade with indirect sunlight, as direct sun can be too intense for the initial rooting stage. Root formation typically takes several weeks, with some varieties showing roots in 8 to 12 weeks.
Caring for Your New Cedar Plants
Once cedar cuttings have developed a root ball, usually after several weeks to a few months, they are ready for the next stage of growth. Gradually acclimate the young plants to less humid conditions by progressively removing any plastic covers or domes. Transplant the rooted cuttings into larger individual pots or a nursery bed, ideally in late spring or early summer after the risk of frost has passed.
When transplanting, dig a hole that is twice the size of the root ball to allow ample space for root expansion. Position the cutting at the same soil level as it was in the rooting pot, then backfill with soil, gently pressing to eliminate air pockets. Young cedar plants require consistent moisture, especially during their establishment period, which can last for the first two growing seasons. Water regularly, ensuring the soil remains evenly moist but not waterlogged. For new plantings, 3 to 5 gallons of water per week, divided into multiple waterings, can be a general guideline.
Provide the young plants with a location that receives ample sunlight, ideally at least six hours of direct sun daily for robust growth. While young cedars can tolerate some partial shade, particularly in their early years, full sun is generally preferred as they mature. Mulching around the base of the plant, keeping it a few inches from the trunk, helps retain soil moisture, regulate temperature, and suppress weeds. Protection from extreme weather, such as hot winds or intense heat, and from pests or browsing animals, can also support their establishment.