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The Forest Service National Center for Reforestation, Nurseries, and Genetic Resources (RNGR) is a leading source of technical information for nurseries and land managers regarding production and planting of trees and other native plants for reforestation, restoration, and conservation.

 
NPN Protocol Details Image

Deinandra (clementina)

Michael Herrera
Nursery Manager
Catalina Island Conservancy
PO Box 2739
Avalon, California 90704
(310) 510-2904
(310) 510-3157 (fax)
mherrera@catalinaconservancy.org
www.catalinaconservancy.org
Family Scientific Name: Asteraceae
Family Common Name: Sunflower Family
Scientific Name: Deinandra clementina (Brandeg.) B.G. Baldwin
Common Synonym: Hemizonia clementina Brandeg.
Common Name: Catalina tarweed
Species Code: DEICLE
Ecotype: Catalina Island, California
General Distribution: Catalina tarweed is endemic to the Channel islands where it is considered common within its range. It inhabits dry rocky sea cliffs, rocky bluffs and valley foothills and grasslands.
Propagation Goal: plants
Propagation Method: seed
ProductType: Container (plug)
Stock Type: 4 cubic inch pine cells
Time To Grow: 0
Target Specifications: Height: N/A<br> Caliper: N/A<br> Root System: Firm root plug in container.
Propagule Collection: Achenes are hand collected when they are fully matured. We usually collect during July and August.
Propagule Processing: Achenes dry in paper bags in a warm, dry room. We clean the seeds by running them through Graimans brand screen (size K). We use a seed blower at 8 to 10 settings to remove chaff. We sift remaining product in a Graimans (size C) pan and re-blow at 8 to 10 setting.After seeds have been cleaned, they are stored under refrigeration in air tight glass containers at 40 F and 40% RH. With 8 collections, seeds average 0.04 grams per 100 seeds.
Pre-Planting Treatments: We have used several treatments to enhance germination. We have pretreated seeds with a 3 to 5 minute Physan fungicide soak or a 5 minute 1% bleach solution to surface sterlize seed coats.
We have also imbibed seeds in distilled water for 24 hours and cold, moist stratified seeds at 40 F for up to 4 weeks.We have also applied a smoke treatment using "Instant Smoke Plus Seed Primer" (Distributer: D. Orrneil-Perth Australia)by soaking seeds for 24 hours in primer solution.
Germination percentages have typically been low regardless of treatment.
Growing Area Preparation/
Annual Practices for Perennial Crops:		 The James H. Ackerman Native Plant Nursery is located on Catalina Island off the coast of southern California. From 1993 to 2004, the average maximum and minimum temperatures have been 75.4 F and 46 F, with an average of 361 frost free days per year and annual rainfall of 14 inches.
The facility is comprised of shade houses, mist propagation house, and an outdoor growing compound. All propagation environments are utilized at different stages of seedling growth to provide for the variance in temperature and shading requirements needed during the growing season. We irrigate all containers with an overhead emitter system in the shadehouses and use a drip system or hand water in the outdoor nursery.
Establishment Phase: Seeds are germinated during winter months in a shadehouse were they remain forseveral weeks. Flats and containers are filled with a 1 inch layer of special seed germination mix of 1:1 (v:v) Sunshine Professional Growing Mix and sand on top of 4:1:1 (v:v:v) peat, perlite, and organic compost. We incorporate Osmocote time release fertilizer (9 month release rate) (14 N:14P2O5:14K2O) at the rate of « cup per 0.75 cubic yard of medium. Seeded flats are watered with an overhead emitter system as needed.
Active Growth Phase: After seedlings are well established and have at least 2 true leaves, they are transplanted into pine cell containers filled with a growing medium of 4:1:1 (v:v:v) peat, perlite, and organic compost. Osmocote time release fertilizer (9 mo release rate) (14 N:14P2O5:14K2O) is incorporated into the medium at a rate of
of « cup per .75 cubic yards of medium.
Hardening Phase: Any nursery stock grown under shadehouse conditions are hardened by placing them in full sun exposure for a minimum of 2 weeks prior to outplanting.
Length of Hardening Phase: 2 to 4 weeks
Harvesting, Storage and Shipping: Containerized seedlings are over wintered directly in the open growing compound.
Length of Storage: Variable; depends on out planting date.

Citation:

Herrera, Mike. 2006. Propagation protocol for production of Container (plug) Deinandra clementina (Brandeg.) B.G. Baldwin plants 4 cubic inch pine cells; Catalina Island Conservancy Avalon, California. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2024/07/02). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.