Quercus (pacifica)
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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: | Fagaceae | ||
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| Family Common Name: | Oak Family | ||
| Scientific Name: | Quercus pacifica Nixon & C.H. Muller | ||
| Common Name: | Channel Island Scrub Oak | ||
| Species Code: | QUEPAC | ||
| Ecotype: | Catalina Island, California | ||
| General Distribution: | Channel Island scrub oak is endemic to the Channel islands. It inhabits chaparral and oak woodlands. | ||
| Propagation Goal: | plants | ||
| Propagation Method: | seed | ||
| ProductType: | Container (plug) | ||
| Stock Type: | #1 Treepot | ||
| Time To Grow: | 1 Years | ||
| Target Specifications: | Height: N/A<br> Caliper: N/A<br> Root System: Firm root plug in container. | ||
| Propagule Collection: | Acorns are hand collected when they are fully matured. We have collected acorns from late August to November. August and September are optimum for collection. Mature acorns are tannish-brown and easily separate from the caps. | ||
| Propagule Processing: |
We clean acorns from any large debris after collection. The white oaks must be kept moist during collection and processing and cannot be dry stored. We immediately place acorns in water to separate floaters from sinkers. |
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| Pre-Planting Treatments: |
We place moist sinkers in ziplock bags and moist medium. These are placed into cold, moist stratification at 40 F for 60 to 90 days. We hydrate acorns in water for 48 hours just prior to sowing. |
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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) 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 containers 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. |
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| Length of Active Growth Phase: | 8 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) Quercus pacifica Nixon & C.H. Muller plants #1 Treepot; Catalina Island Conservancy Avalon, California. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/02/24). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
