Arctostaphylos (patula)

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:	Ericaceae
Family Common Name:	Heath
Scientific Name:	Arctostaphylos patula
Common Name:	Greenleaf manzanita
Species Code:	ARPA6
Ecotype:	Deschutes National Forest, Oregon
General Distribution:	From Washington through Oregon cascades to Sierra Nevada and coast range of northern California. Also eastward to the Great Basin, Western Colorado, and higher elevations of northern Arizona.
Propagation Goal:	Plants
Propagation Method:	Vegetative
ProductType:	Container (plug)
Stock Type:	444 ml (27 in3) container
Time To Grow:	10 to 16 months
Target Specifications:	Stock Type: Container steckling Root System: Firm plug in container.
Propagule Collection:	Collect in mid-winter or late spring/early summer. Collect newest woody material when plants are dormant, or collect fresh green cuttings when new growth has just begun to suberize.
Propagule Processing:	Keep cuttings moist and cold until sticking. Cutting should not be stored for more than 48 hours before processing.
Pre-Planting Treatments:	Dormant cuttings: The base of the stem is cut at a 45° angle and immediately dipped in 1000 ppm IBA. The cutting is then inserted into a pre-dibbled hole in well-drained rooting medium. Green cuttings: The base of the stem is cut at a 45° angle and immediately dipped in 500 ppm IBA. The cutting is then inserted into a pre-dibbled hole in well-drained rooting medium. Rooting medium used is 30:20:30:20 peat:composted fir bark:perlite:pumice with no fertilizer added.
Growing Area Preparation/ Annual Practices for Perennial Crops:	Rooting chamber. Stecklings are placed in a climate-controlled rooting chamber, maintained at 100% RH with mist; bench temperature maintained at 21 °C; air temperature maintained at 18 °C. When rooting has occurred, cells are moved to the greenhouse to continue culturing. Greenhouse growing facility. Cells are fertilized with Nutricote controlled release fertilizer (18N:6P2O5:8K2O with minors; 180-d release rate at 21C) at the rate of 1.5 gram Nutricote per 262 ml container.
Establishment Phase:	Rooting is very slow, and can take up to 3 months before cells are ready to be moved to a greenhouse facility. Success rate is usually around 50% for this species. Following rooting, plants are fertilized with soluble 12-2-14-6Ca-3Mg at 75 to 100 ppm for 4 weeks.
Length of Establishment Phase:	3 to 4 months
Active Growth Phase:	Plants are slow-growing, sometimes requiring 2 full growing seasons depending on when cuttings were collected. However, if cuttings were taken in the winter, plants can reach target specifications if fertilized heavily throughout the growing season. Soluble fertilizer (20-9-20 NPK, 20-18-18 NPK, or 17-5-24 NPK) at 150 ppm is applied weekly throughout the growing season.
Length of Active Growth Phase:	18 to 19 weeks
Hardening Phase:	No dry-down is done to induce dormancy. Seedlings are moved to an outdoor growing area in late September.
Length of Hardening Phase:	3 weeks
Harvesting, Storage and Shipping:	Harvest Date: 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.
Other Comments:	Prefers well drained, acidic soils in open sunny areas. Develops an obligate relationship with soil mycorrhizal fungi. Generally grows in areas with cool, dry summers and wet winters. It has a high tolerance to cold. It depends on partial snow cover to protect dormant buds. Adapted to occasional fires, which help seed germination and crown sprouting.
References:	Dorena Genetic Resource Center Propagation Records, unpublished. Wild Garden. 2016. Hansen’s Northwest Native Plant Database. URL: http://www.nwplants.com/business/catalog/arc_pat.html (accessed 12 Oct 2018). Wilken D, Burgher J. 2006. Plant guide: Greenleaf manzanita Arctostaphylos patula E. Greene. Santa Barbara (CA): USDA Natural Resources Conservation Service Plant Data Center and Santa Barbara Botanic Garden. URL: https://plants.usda.gov/plantguide/pdf/pg_arpa6.pdf (accessed 12 Oct 2018).

Citation:

Riley, Lee E.; Fisher, Leslie. 2018. Propagation protocol for production of Container (plug) Arctostaphylos patula Plants 444 ml (27 in3) container; USDA FS - Dorena Genetic Resource Center Cottage Grove, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/05/05). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.