Holodiscus (discolor)
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Betty Young Nurseries Sr Manager Bldg 201, Fort Mason San Francisco, California 94123 415-331-6917 415-331-7521 (fax) byoung@ggnpa.org |
| Family Scientific Name: | Rosaceae | ||
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| Family Common Name: | Rose Family | ||
| Scientific Name: | Holodiscus discolor (Pursh) Maxim. | ||
| Common Synonym: | Spiraea discolor Pursh | ||
| Common Name: | Oceanspray | ||
| Species Code: | HOLDIS | ||
| Ecotype: | Marin County, California | ||
| General Distribution: | H. discolor occurs from B.C. to southern California, east to western Montana, Idaho, and northeastern Oregon; from coastal bluffs to lower elevation mountains. | ||
| Propagation Goal: | plants | ||
| Propagation Method: | seed | ||
| ProductType: | Container (plug) | ||
| Stock Type: | Deepot 40 | ||
| Time To Grow: | 0 | ||
| Target Specifications: | Height: N/A<br> Caliper: N/A<br> Root System: Firm plug in container. | ||
| Propagule Collection: |
Seeds are collected between October 1st and December 1st. Mature inflorescences are brown. Seeds are 1 mm long or less. |
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| Propagule Processing: |
Seed Cleaning:Rub Clusters over a sieve and continue until most seeds fall through. Storage Conditions: Seeds are kept dry and stored in a refrigerator. Seeds/gram: 5,000 |
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| Pre-Planting Treatments: | Soak seed in fresh water for 3 hours. Drain and place in a plastic freezer bag with an equal amount of ph neutral peat moss. Stratify in the refrigerator at 40F for 3 to 4 months or until seeds begin to germinate. When radicles are seen, sow the entire seed lot. | ||
| Growing Area Preparation/ Annual Practices for Perennial Crops: |
Fully Controlled Greenhouse. Sowing Method: Transplanting Germinants. 5 grams of seeds are sown per flat containing Sunshine Mix #4 Aggregate Plus (peat moss, perlite, major and minor nutrients, gypsum, and dolomitic lime). Seeds are mixed with media to sow and are surface sown. Flats are watered in with an automatic mist and irrigation system. Seeds are sown on May 1st. % Germination: 5% |
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| Establishment Phase: |
Seeds germinate 14 days after sowing. Seedlings are transplanted 14 days after germination to individual containers 2"x10" tubes (Deepot 40) containing standard potting mix of peat moss, fir bark, perlite, and sand. Transplant Survival averages 75%. |
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| Length of Establishment Phase: | 28 days | ||
| Active Growth Phase: |
After seedlings are established, they are moved to the shadehouse (under 30% shade)and grow rapidly. Fertilize with Nutricote NPK (13-13-13) 3 months after transplanting. Prune back 2 months after transplanting and as necessary. |
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| References: | A California Flora and Supplement, Munz, P., University of California Press, Berkeley and London, 1973. | ||
Citation:
Young, Betty. 2001. Propagation protocol for production of Container (plug) Holodiscus discolor (Pursh) Maxim. plants Deepot 40; San Francisco, California. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/04/21). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
