Grindelia (hirsutula)
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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: | Asteraceae | ||
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| Family Common Name: | Sunflower Family | ||
| Scientific Name: | Grindelia hirsutula Hook. & Arn. | ||
| Common Name: | Hairy Gumweed | ||
| Species Code: | GRIHIR | ||
| Ecotype: | MArin County, California | ||
| General Distribution: | G. hirsutula is found on arid slopes from coastal sage scrub; from Napa County to Monterery County; also Ventura County, California. | ||
| Propagation Goal: | plants | ||
| Propagation Method: | seed | ||
| ProductType: | Container (plug) | ||
| Stock Type: | Deepot 16 | ||
| 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 June 1st and October 1st. Mature inflorescences are brown. |
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| Propagule Processing: |
Seed Cleaning: Rub seed heads over seed. Storage Conditions: Seeds are kept dry and stored in a refrigerator. |
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| Pre-Planting Treatments: | Soak fresh seeds overnight in water. Cold stratify in peat moss for 2 weeks or until seeds begin to sprout. | ||
| Growing Area Preparation/ Annual Practices for Perennial Crops: |
Fully Controlled Greenhouse. Sowing Method: Transplanting Germinants. 6 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 covered with media. Flats are watered in with an automatic mist and irrigation system. Seeds are sown on August 15th. % Germination:50% |
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| Establishment Phase: |
Seeds germinate 14 days after sowing. Seedlings are transplanted 14 days after germination to individual containers 2"x7" tubes (Deepot 16) containing standard potting mix of peat moss, fir bark, perlite, and sand. Transplant Survival averages 75%. |
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| Active Growth Phase: |
Fertilize with Nutricote NPK (13-13-13) 3 months after transplanting. Prune back 2 months after transplanting; leaving at least 4 nodes. |
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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) Grindelia hirsutula Hook. & Arn. plants Deepot 16; San Francisco, California. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/03). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
