Coreopsis (tripteris)
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Shelby J. French Propagation Manager Mt. Cuba Center 3120 Barley Mill Road Hockessin, Delaware 19707 302 239 8819 302 239 5366 (fax) sfrench@mtcubacenter.org http://www.mtcubacenter.org/ |
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| Family Scientific Name: | Asteraceae | ||
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| Family Common Name: | Aster | ||
| Scientific Name: | Coreopsis tripteris | ||
| Common Name: | tall tickseed | ||
| Ecotype: | Alexander County, North Carolina (first sowing), and Jefferson County, Alabama (second sowing). | ||
| General Distribution: | Native to North America, Coreopsis tripteris is found in Quebec and Ontario, Canada. In the United States it ranges from the eastern edge of Texas, Oklahoma and Kansas, east to Pennsylvania and south to Florida. Also including Southeast New York and southern Connecticut, Rhode Island and Massachusetts. | ||
| Propagation Goal: | Plants | ||
| Propagation Method: | Seed | ||
| ProductType: | Container (plug) | ||
| Stock Type: | 1 quart container | ||
| Time To Grow: | 11 to 12 weeks | ||
| Target Specifications: | Well-rooted 1 quart container. | ||
| Propagule Collection: |
Seed should be collected when beginning to turn gray-brown in color but before they are wind-dispersed from the plant. Store seed in a paper bag at room temperature until cleaned, ideally keeping seeds in a well-ventilated, dry environment. |
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| Propagule Processing: | Hand clean seed by separating seed from chaff. If seed are still attached to seed head, grasp the tuft and pull gently to remove, the seed is attached to the end of the tuft. By firmly grasping the seed, chaff can be rubbed with finger tips to remove or carefully removed with scissors. | ||
| Pre-Planting Treatments: | Seed is cold stratified for 90 days at 3.8˚Celcius (39˚Fahrenheit), in a Ziploc bag with a small amount of Metro-Mix 510 media. A squirt bottled is used to moisten the media to a slightly damp consistency, not wet. Seed is checked on a monthly interval to monitor moisture level and check for possible germination. | ||
| Growing Area Preparation/ Annual Practices for Perennial Crops: |
After 90 day cool stratification seed are hand sown into propagation tray or a 6" clay pot, then placed in the propagation house. Bottom heat is provided by hot water tubes under flats 18-24˚Celcius (65-75˚Fahrenheit). The greenhouse propagation environment alternates day/night temperatures. Daytime temperatures vary from 18-26˚Celcius (65-80˚Fahrenheit). Night temperature is set at a minimum of 16˚Celcius (62˚Fahrenheit). High pressure sodium lighting is utilized to extend the day length to 16 hours. |
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| Establishment Phase: |
The first sowing occurs February 3 with germination in 11 days on February 14. The second sowing occurs February 21 with germination in 8 days on March 1. A germination rate of 11% occurs with the first sowing and a rate of 86% in the second sowing. This shows the viability differences possible in wild collected seed sources. For both sowings, 2 weeks after germination seed pans are moved from the propagation house into a shaded greenhouse, with average temperatures of 18-24˚Celcius (65-75˚Fahrenheit), and still under extended day length of 16 hours. |
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| Length of Establishment Phase: | 3 to 4 weeks | ||
| Active Growth Phase: |
After true-leaves appear and seedlings are sturdy, they are transplanted into 5 centimeter (2 inch) peat pots using a commercial potting media with a minor amount of added fertilizer. For both sowing groups this is approximately 3 weeks after germination occurs. When roots begin to show through the edges of the peat pots they are transplanted into 1 quart containers using a commercial potting media. For both sowing groups this is approximately 9 weeks after germination occurs. Fertilizers available in the media are in two forms, immediately available 11-5-11 and slow-release Nutricote 18-6-8. No additional fertilizer is added. |
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| Length of Active Growth Phase: | 4 to 6 months | ||
| Hardening Phase: | Approximately 2 weeks prior to outplanting in mid-to-late May, plants are moved outside to a semi-sheltered location. | ||
| Length of Hardening Phase: | 2 weeks | ||
| References: |
Cullina, W. (2000). Growing and propagating wildflowers of the United States and Canada. New York: Houghton Mifflin Company. Illinois wildflowers. (2015) Tall tickseed. Retrieved from http://www.illinoiswildflowers.info/index.htm Missouri Botanical Garden. (n.d.) Coreopsis tripteris. Retrieved from http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=g470 U.S.D.A. Natural Resources Conservation Service. (n.d.) Coreopsis tripteris. Retrieved from http://plants.usda.gov/core/profile?symbol=cotr4 Weakley, A. S. (2015, May 21). Flora of the Southern and Mid-Atlantic States. Retrieved from http://www.herbarium.unc.edu/FloraArchives/WeakleyFlora_2015-05-29.pdf |
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Citation:
French, Shelby J.. 2016. Propagation protocol for production of Container (plug) Coreopsis tripteris Plants 1 quart container; Mt. Cuba Center Hockessin, Delaware. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/04/25). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.
