Rhamnus (pirifolia)
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Michael Herrera Nursery Manager Catalina Island Conservancy PO Box 2739 Avalon, California 90704 (310) 510-2904 (310) 510-3157 (fax) mherrera@catalinaconservancy.org www.catalinaconservancy.org |
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| Family Scientific Name: | Rhamnaceae | ||
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| Family Common Name: | Buckthorn Family | ||
| Scientific Name: | Rhamnus pirifolia Greene | ||
| Common Synonym: | Rhamnus crocea Nutt. | ||
| Common Name: | Island Red Berry | ||
| Species Code: | RHAPIR | ||
| Ecotype: | Catalina Island, California | ||
| General Distribution: | Island Red Berry is endemic to the Channel islands. On Catalina Island, it inhabits chaparral,woodlands, and rocky slopes. | ||
| Propagation Goal: | plants | ||
| Propagation Method: | seed | ||
| ProductType: | Container (plug) | ||
| Stock Type: | #1 Treepot (173 cubic inches) | ||
| Time To Grow: | 1 Years | ||
| Target Specifications: | Height: N/A<br> Caliper: N/A<br> Root System: Firm root plug in container. | ||
| Propagule Collection: | Seeds are hand collected when they are fully matured. August and September are optimum for collection. Fruits are bright red with brown seeds at maturity. | ||
| Propagule Processing: |
Fruits dry in paper bags in a warm, dry room. We clean the seeds by running dry fruits through a modified blender to remove pulp from the seeds. We sift blended material through Graimans brand "J" pan to remove fine debris. We blow material at 30 to 38 setting for 3 minutes setting to remove debris. After seeds have been cleaned, they are stored under refrigeration in air tight glass containers at 40 F and 40% RH. |
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| Pre-Planting Treatments: |
We have used a 5 to 10 minute Physan disinfectant soak or a 3 to 5 minute 5% bleach solution to surface sterilize seed coats prior to testing or sowing.We place seeds into cold, moist stratifiation for 1 to 2 months at 40 F or we sow containers in late October to allow seeds to undergo natural stratification during fall and winter months. Germination percentages have ranged from 21 to 78%. |
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| Growing Area Preparation/ Annual Practices for Perennial Crops: |
The James H. Ackerman Native Plant Nursery is located on Catalina Island off the coast of southern California. From 1993 to 2004, the average maximum and minimum temperatures have been 75.4 F and 46 F, with an average of 361 frost free days per year and annual rainfall of 14 inches. The facility is comprised of shade houses, mist propagation house, and an outdoor growing area. All propagation environments are utilized at different stages of seedling growth to provide for the variance in temperature and shading requirements needed during the growing season. We irrigate all containers with an overhead emitter system in the shadehouses and use a drip system or hand water in the outdoor nursery. |
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| Establishment Phase: |
Seeds are germinated during late January in a shadehouse were they remain for several weeks. Seeds are directly sown into #1 Treepots (173 cubic inches) or Deepots filled with 4:1:1 (v:v:v) peat, perlite, and organic compost. We incorporate Osmocote time release fertilizer (9 month release rate) (14 N:14P2O5:14K2O) at the rate of « cup per 0.75 cubic yard of medium. Seeded flats are watered with an overhead emitter system as needed. Seeds germinate 2 to 4 weeks after sowing. |
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| Length of Establishment Phase: | 1 to 2 months | ||
| Active Growth Phase: |
Following establishment, seedlings are moved to another shadehouse with more temperature variance where they remain for several weeks. Seedlings are watered as needed. |
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| Length of Active Growth Phase: | 9 months | ||
| Hardening Phase: | Any nursery stock grown under shadehouse conditions are hardened by placing them in full sun exposure for a minimum of 2 weeks prior to outplanting. | ||
| Length of Hardening Phase: | 2 to 4 weeks | ||
| Harvesting, Storage and Shipping: | Containerized seedlings are over wintered directly in the open growing area. | ||
| Length of Storage: | Variable; depends on out planting date. | ||
Citation:
Serrill, Doug; Herrera, Mike; Takara, Janet. 2006. Propagation protocol for production of Container (plug) Rhamnus pirifolia Greene plants #1 Treepot (173 cubic inches); Catalina Island Conservancy Avalon, California. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/01). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
