Spiraea (splendens)
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jtrindle USDA NRCS - Corvallis Plant Materials Center 3415 NE Granger Ave Corvallis, Oregon 58413 (541)757-4812 http://plant-materials.nrcs.usda.gov/orpmc |
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| Family Scientific Name: | Rosaceae | ||
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| Family Common Name: | Rose | ||
| Scientific Name: | Spiraea splendens Baumann ex K. Koch splendens | ||
| Common Synonym: | Spiraea densiflora Nutt. ex Greenm. | ||
| Common Name: | Alpine spirea; rose meadowsweet; mountain spirea | ||
| Species Code: | SPSPS | ||
| Ecotype: | Crater Lake National Park , 6,500 ft elevation, along streams in gravelly areas and base of talus slopes | ||
| General Distribution: | Washington to California; east to Montana and Nevada, up to 11,000 ft elevation along streams and lakes, or on wooded or open rocky slopes | ||
| Propagation Goal: | plants | ||
| Propagation Method: | seed | ||
| ProductType: | Container (plug) | ||
| Stock Type: | 1-gallon containers | ||
| Time To Grow: | 2 Years | ||
| Target Specifications: | Multi-stemmed tops with well-developed, fibrous root system filling soil profile in container. | ||
| Propagule Collection: | Seeds easily collected by hand when flower heads have dried down on plants. If desired, cuttings can also be collected unobtrusively from these shrubs. | ||
| Propagule Processing: | Small amounts can be hand-rubbed; larger quantities threshed with geared-down hammermill with a 1/8" screen, followed by air-screening with a #8 round screen and medium - low air flow. | ||
| Pre-Planting Treatments: | 48 days cold-moist stratification recommended; however some seeds germinated without any pretreatment. Germination was not formally tested for this species; however seedling emergence was excellent when sown at a rate of 5 to 8 seeds / cone | ||
| Growing Area Preparation/ Annual Practices for Perennial Crops: |
Seeds were direct-sown into 10" conetainers containing a greenhouse media mix of Fisons' Sunshine #1 potting medium amended with 1 part compost-based potting mix to 4 parts Sunshine 1, and low rates of Osmocote slow-release NPK pellets. | ||
| Establishment Phase: | Seedlings were started on greenhouse benches in moderate temperatures in early spring. Emergence was fairly fast and uniform; some hand-thinning was required when sown at the rate listed above. Seedlings were fertilized with Peters 9 - 45 -15 when established. | ||
| Length of Establishment Phase: | 8 to 12 weeks | ||
| Active Growth Phase: | Established plants were moved to an outdoor shadehouse (47% shadecloth) on raised benches in late May when greenhouse temperatures became too warm. Aphids were sometimes a problem, and were controlled with Safers' insecticidal soap as needed. Plants were fertilized every 2 weeks with Peters' Triple 20 at « - strength. | ||
| Length of Active Growth Phase: | May to August | ||
| Hardening Phase: | Fertilizer was withdrawn after July and intervals between waterings gradually lengthened in August to encourage vegetative maturity and stem suberization; shade cloth was withdrawn in late August to expose plants to a full sun environment. | ||
| Length of Hardening Phase: | 6 weeks. | ||
| Harvesting, Storage and Shipping: | Cones were held over winter in Corvallis in an outdoor lathhouse; plants were repotted the following April into 1-gallon containers and returned to the shade house with drip irrigation for the 2nd season to reach the desired size. Generally only some light top-pruning was needed the 2nd hear to control stem height. Two-year 1-gallon containers were shipped via refrigerated van to Crater Lake National Park in late August for a few weeks additional acclimation prior to outplanting in September. | ||
| Length of Storage: | Container stock overwintered well at PMC | ||
| Other Comments: | Rooting one-year-old summer softwood cuttings in mist bench was also successful. Larger cuttings could be directly potted up in 1-gallon containers. Since seeds were plentiful in most years and germination remained fairly high for at least 2 years, we preferred the ease of seed propagation. Where larger "specimen-type" plants are not needed, it should be feasible to directly plant 1-year cone-tainers into restoration sites. | ||
| References: |
Corvallis Plant Materials Center Technical Report: Plants for Woodland and Rangeland Reclamation and Erosion Control 1980 - 1997 (includes Annual Reports to Mount Rainier National Park from 1990 - 1996 Link, Ellen, ed. 1993 Native Plant Propagation Techniques for National Parks Interim Guide; Compiled by Rose Lake Plant Materials Center 7472 Stoll Road East Lansing, MI 48823 Kruckeberg, Aurthur R. 1982. Gardening With Native Plants of the Pacific Northwest: An Illustrated Guide. Seattle: Univ. of Washington Press. Rose, Robin, C.E.C. Chachulski and D. Haase. Propagation of Pacific Northwest Native Plants 1998 Or. State U. Press, Corvallis, Oregon USDA, NRCS. 2001. The PLANTS Database, Version 3.1 (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA. |
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Citation:
Flessner, Theresa R; Trindle, Joan D.C.. 2003. Propagation protocol for production of Container (plug) Spiraea splendens Baumann ex K. Koch plants 1-gallon containers; USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/05/18). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
