Protocol Information

Betty Young
Nurseries Sr Manager
Bldg 201, Fort Mason
San Francisco, California 94123
415-331-6917
415-331-7521
byoung@ggnpa.org

Family Scientific Name:	Aceraceae
Family Common Name:	Maple Family
Scientific Name:	Acer macrophyllum Pursh.
Common Name:	Big Leaf Maple
Species Code:	ACEMAC
Ecotype:	Marin County, California
General Distribution:	A. macrophyllum is found from Alaska to California, mostly west of the Cascade mountains. it is also found in west central Idaho.
Propagation Goal:	Plants
Propagation Method:	Seed
Product Type:	Container (plug)
Stock Type:	Deepot 40
Target Specifications:	Height: N/A Caliper: N/A Root System: Firm plug in container.
Propagule Collection:	Seeds are collected between October 1st and December 1st. Samaras are brown at maturity. Seeds are collected from trees using a long pole pruner. Seeds can also be collected from the ground as a last resort.
Pre-Planting Treatments:	Seeds are soaked for 48 hours in water. Seeds are placed in plastic ziplock bags with moist perlite in the refrigerator for 3 to 4 months. Seeds are checked periodically for germination.Sowing Method: Direct Sowing. Seeds are sown when seeds begin to germinate in the refrigerator.
Growing Area Preparation/ Annual Practices for Perennial Crops:	Fully Controlled Greeenhouse. Seeds are sown at the rate of 2 seeds per container in 2"x10" tube (Deepot 40). Planting Depth is 2 times the diameter of seed. Germination %: 40% Potting mix used is a blend of peat moss, fir bark, perlite and sand. Seedlings are watered in with an automatic irrigation system.
Establishment Phase:	Seeds germinate 21 days after sowing. Containers with more than one germinate are transplanted to separate containers. Average transplant survival is 65%.
References:	Flora of the Pacific Northwest, Hitchcock, C.,and Cronquist,A., University of Washington Press, Seattle and London, 1973.

Citation:

Young, Betty 2001. Propagation protocol for production of container Acer macrophyllum Pursh. plants (Deepot 40); , San Francisco, California. In: Native Plant Network. URL: http://www.nativeplantnetwork.org (accessed 3 September 2010). Moscow (ID): University of Idaho, College of Natural Resources, Forest Research Nursery.