Atriplex (polycarpa)
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Jean Graham Nursery Manager USDI NPS - Joshua Tree National Park Native Plant Nursery 74485 National Park Drive Twentynine Palms, California 92277 760-367-5565 http://www.ggnpa.org |
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| Family Scientific Name: | Chenopodiaceae | ||
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| Family Common Name: | Goose foot Family | ||
| Scientific Name: | Atriplex polycarpa (Torr.) S. Wats. | ||
| Common Name: | All Scale | ||
| Species Code: | ATRPOL | ||
| Ecotype: | Joshua Tree National Park, California | ||
| General Distribution: | A. polycarpa is found in alkaline soils; from Owens Valley, Calfornia to Utah and south to Sonora and Lower California, Mexicio. | ||
| Propagation Goal: | plants | ||
| Propagation Method: | seed | ||
| ProductType: | Container (plug) | ||
| Stock Type: | 2 Gallon PVC Pipe container | ||
| Time To Grow: | 6 Months | ||
| Target Specifications: | Height: N/A<br> Caliper: N/A<br> Root System: Firm Root Plug in container. | ||
| Propagule Collection: | Seeds are hand collected in late fall when seeds have matured. | ||
| Propagule Processing: | Seeds are allowed to dry for 4 to 6 weeks in paper bags in a warm, dry room. After seeds have been cleaned, they are stored under refrigeration in air tight containers at 7C. | ||
| Pre-Planting Treatments: |
Seeds are leached/soaked in water for 10 to 24 hrs to remove any inhibitors and to allow full imbibition of seeds prior to sowing. Seeds are sown in open flats using a growing medium of 2 parts sand, 1 part mulch and 2 parts perlite (v:v:v). |
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| Growing Area Preparation/ Annual Practices for Perennial Crops: |
The Joshua Tree Native Plant Nursery is located in the Mojave Desert of southern California and has an average of 250 frost free days per year and annual rainfall of 5 to 10 cm (2 to 4 in.) The facility is comprised of two greenhouses, shade structures, mist propagation beds and an outdoor growing compound. All propagation environments are utilized at different stages of seedling growth to provide for the variance in temperature and shading requirements during the growing season. We irrigate all containers with an automated drip irrigation system. |
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| Establishment Phase: | Seedlings are germinated on flats in a germination chamber or under mist where they remain until well established, approximately 2-3 weeks. They are transplanted into newspaper cylinders wrapped with polyvinyl food wrap. The newspaper container is 29 cm (11.5 in) tall and 7.5 cm (3 in) in diameter. The newspaper pots are filled with a growing medium of 2:1:1 (v:v:v) sand, mulch, and perlite. | ||
| Length of Establishment Phase: | 4 weeks | ||
| Active Growth Phase: |
Seedlings are ready for transplanting into larger containers at 8 to 12 weeks. The entire newspaper pot minus the plastic wrap is transplanted into the PVC containers using the same medium described for the newspaper containers. Osmocote time release fertilizer (9 mo release rate) (13 N:13P2O5:13K2O) is incorporated into the medium at the approximate rate of 22 g per 6l ( 2 gal) PVC containers. PVC containers are 37.5 cm tall(15 in) and are 15 cm (6 in)in diameter. Following transplanting, they are moved to the open growing compound that is covered with a 55% shadecloth during the summer months. The containers are irrigated by an automated drip system; the duration varies according the season. |
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| Length of Active Growth Phase: | 4 months | ||
| Hardening Phase: | Irrigation frequency and duration is gradually reduced for 4 to 8 weeks prior to out-planting. The shadecloth is removed from the open growing compound in late fall when daytime temperatures begin to cool. Nursery stock is top pruned at this stage. | ||
| Length of Hardening Phase: | 4 weeks | ||
| Harvesting, Storage and Shipping: | Containerized seedlings are over wintered directly in the open growing compound. | ||
| Length of Storage: | Variable; depends on out planting date. | ||
Citation:
Graham, Jean. 2004. Propagation protocol for production of Container (plug) Atriplex polycarpa (Torr.) S. Wats. plants 2 Gallon PVC Pipe container; USDI NPS - Joshua Tree National Park Native Plant Nursery Twentynine Palms, California. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/04/04). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
