Asteraceae (Rudbeckia)

Protocol Information for:

Label_title:
Rudbeckia (occidentalis)

Family Names:

Family Scientific Name:
Asteraceae

Family Common Name:
Aster

Scientific Names:

Genus:
Rudbeckia

Species:
occidentalis

Scientific Classification:

Scientific SubSpecies:

Species Authority:

Scientific SubAuthority:

Authors:

Common Synonym:

Genus:

Species:

Synonym Classification:

Synonym SubSpecies:

Species Authority:

Synonym SubAuthority:

Other Information:

Common Name:
western coneflower

Species Code:
RUOC2

Ecotype:
Umpqua National Forest, Oregon

General Distribution:
Western United States

Known Invasiveness:

Propagation Goal:
Plants

Propagation Method:
Seed

Product Type:
Container (plug)

Stock Type:
262 ml (16 in3) container

Grow Time:
15 weeks

Target Specifications:
Stock Type: Container seedling Root System: Firm plug in container.

Propagation Collection:

Propagation Processing/Propagule Characteristics:

Pre-Planting Propagule Treatments:
Seeds are placed in fine mesh bags into a 1% hydrogen peroxide (3:1 water/3% hydrogen peroxide) soak for 24 hours, rinsed, and placed in water for an additional 24 hours. The bags are placed in sealed containers in refrigeration at 1 to 3 °C for 90 days. It is very important to check seeds weekly. If mold is evident, seeds should be treated with 1% hydrogen peroxide.

Growing Area Preparation / Annual Practices for Perennial Crops:
Greenhouse growing facility. Seeds are directly sown into containers. Seeds are lightly covered with nursery grit. Growing medium used is 40:20:20:20 peat:composted fir bark:perlite:pumice with Nutricote controlled release fertilizer (18N:6P2O5:8K2O with minors; 180-d release rate at 21C) at the rate of 1.5 gram Nutricote per 262 ml container.

Establishment Phase:
Germination is somewhat uneven, and may take up to 3 weeks to be complete. Following germination, plants are fertilized with soluble 12-2-14-6Ca-3Mg at 75 ppm for 1 week.

Length of Establishment Phase:
3 weeks

Active Growth Phase:
Seedlings grow rapidly throughout the active growth phase. During the growing season, fertilization depends on weather. Soluble 20-9-20 NPK, 20-18-18 NPK, or 17-5-24 NPK at a rate of 100 to 150 ppm is applied weekly throughout the growing season.

Length of Active Growth Phase:
12 weeks

Hardening Phase:
No dry-down is done to induce dormancy. Seedlings are moved to an outdoor growing area in early to mid September.

Length of Hardening Phase:
2 weeks

Harvesting, Storage and Shipping:
Harvest Date: Mid to late October Storage Conditions: Seedlings are usually outplanted in fall. No storage except in outdoor growing area. Plants are well irrigated prior to shipping and shipped in containers.

Length of Storage:

Guidelines for Outplanting / Performance on Typical Sites:

Other Comments:
Wetland classification: FAC

References:
Dorena Genetic Resource Center Propagation Records, unpublished. USDA Natural Resources Conservation Service. Rudbeckia occidentalis Nutt. western coneflower. URL: https://plants.usda.gov/core/profile?symbol=RUOC2 (accessed 10 Oct 2018).

Citation:
Riley, Lee E.; Klocke, Allison. 2018. Propagation protocol for production of Container (plug) Rudbeckia occidentalis Plants 262 ml (16 in3) container; USDA FS - Dorena Genetic Resource Center Cottage Grove, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/07/08). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.

Personal tools