Heracleum (maximum)
|
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: | Apiaceae | ||
|---|---|---|---|
| Family Common Name: | Carrot Family | ||
| Scientific Name: | Heracleum maximum Bartr. | ||
| Common Synonym: | Heracleum lanatum Michx. | ||
| Common Name: | Cow Parsnip | ||
| Species Code: | HERMAX | ||
| Ecotype: | Muir Woods, California | ||
| General Distribution: | H. maximum is found in moist woods and slopes from near sealevel to the subalpine zone. | ||
| Propagation Goal: | plants | ||
| Propagation Method: | seed | ||
| ProductType: | Container (plug) | ||
| Stock Type: | 1 gallon cans | ||
| 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 July 1st and September 30th. Mature inflorescences are brown. Seed is black and white at maturity and are easily removed from the inflorescence. |
||
| Propagule Processing: |
Seed Cleaning: None required. Storage Conditions: Seeds are kept dry and stored in a refrigerator. |
||
| Pre-Planting Treatments: | May benefit from stratification for 2 weeks. | ||
| Growing Area Preparation/ Annual Practices for Perennial Crops: |
Fully Controlled Greenhouse. Sowing Method: Transplanting Germinants. 10 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 and are placed on a heated bench. % Germination:50% |
||
| Establishment Phase: |
Seeds germinate 30 days after sowing. Seedlings are transplanted 30 days after germination to individual 3L containers (1 gallon cans) containing standard potting mix of peat moss, fir bark, perlite, and sand. Transplant Survival averages 50%. |
||
| Length of Establishment Phase: | 2 months | ||
| References: | A California Flora and Supplement, Munz, P., University of California Press, Berkeley and London, 1973. | ||
Citation:
Young, Betty. 2006. Propagation protocol for production of Container (plug) Heracleum maximum Bartr. plants 1 gallon cans; 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.
