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Ceanothus (incanus)
Lee Riley Horticulturist USDA FS - Dorena Genetic Resource Center 34963 Shoreview Road Cottage Grove, Oregon 97424 541-915-7324 541-767-5709 (fax) leriley@fs.fed.us |
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Family Scientific Name: | Rhamnaceae | ||
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Family Common Name: | Buckthorn | ||
Scientific Name: | Ceanothus incanus | ||
Common Name: | Coast whitethorn | ||
Species Code: | CEIN | ||
Ecotype: | Rogue River-Siskiyou National Forest | ||
General Distribution: | California and southern Oregon | ||
Propagation Goal: | Plants | ||
Propagation Method: | Seed | ||
ProductType: | Container (plug) | ||
Stock Type: | 444 ml (27 in3) container | ||
Time To Grow: | 18 weeks | ||
Target Specifications: | Stock Type: Container seedling Root System: Firm plug in container. | ||
Pre-Planting Treatments: |
Seeds are placed in fine mesh bags, soaked for 10 seconds in boiling water and then immediately transferred in cold water. Seeds are then placed into a 1% hydrogen peroxide (3:1 water/3% hydrogen peroxide) soak for 24 hours, rinsed, and placed in water for an additional 4 hours. Seeds are sown into trays filled with stabilized medium plugs (Q-plugs). Trays are sealed inside plastic bags and placed into refrigeration at 1 to 3 °C for 90 days. Trays are checked weekly and kept moist throughout the stratification period. If mold is evident, trays should be treated with 1% hydrogen peroxide. |
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Growing Area Preparation/ Annual Practices for Perennial Crops: |
Greenhouse growing facility. Q-plugs are lightly covered with nursery grit. Seedlings are transplanted to target containers approximately 3 weeks following removal from stratification. Growing medium used is 40:20:20:20 peat:composted fir bark:perlite:pumice with Apex controlled release fertilizer (16N:5P2O5:10K2O with minors; 6 to 7 month release rate at 21C) at the rate of 2 gram Apex per 444 ml container. |
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Establishment Phase: | Germination is fairly uniform and is usually complete in 2 weeks. Following germination (while still in Q-plugs), plants are fertilized with soluble 12-2-14-6Ca-3Mg at 75 to 100 ppm for 2 weeks. | ||
Length of Establishment Phase: | 2 to 3 weeks | ||
Active Growth Phase: | Plants grow rapidly following establishment. Soluble fertilizer (20-9-20 NPK, 20-18-18 NPK, or 17-5-24 NPK) at 100 to 150 ppm is applied weekly throughout the growing season. | ||
Length of Active Growth Phase: | 15 weeks | ||
Hardening Phase: | No dry-down is done to induce dormancy. Seedlings are moved to an outdoor growing area in early September. | ||
Length of Hardening Phase: | 2 to 3 weeks | ||
Harvesting, Storage and Shipping: |
Harvest Date: Mid to late October Storage Conditions: Seedlings are usually outplanted in fall. No storage except in outdoor growing area. Plants are well irrigated prior to shipping and shipped in containers. |
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Other Comments: | Coast whitethorn is difficult to handle in the nursery. Spines are persistent and sharp, and plants should be handled with heavy gloves. | ||
References: |
Dorena Genetic Resource Center Propagation Records, unpublished. USDA Natural Resources Conservation Service. nd. Ceanothus incanus Torr. & A. Gray coast whitethorn. URL: https://plants.usda.gov/core/profile?symbol=CEIN (accessed 14 Oct 2018). |
Citation:
Riley, Lee E.. 2018. Propagation protocol for production of Container (plug) Ceanothus incanus Plants 444 ml (27 in3) container; USDA FS - Dorena Genetic Resource Center Cottage Grove, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/08/25). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.