Greenthread
Thelesperma filifolium
Last reviewed: June 2026
Thelesperma filifolium (Greenthread) is a drought-tolerant native forb producing yellow flowers from March through November across the Great Plains and Southwest.
Light
full sun
Water
low
Size
12"–24" H × 12"–24" W
Bloom
Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
Native to
AR, CO, KS, LA and 8 more states
Pollinators
butterflies, nectar insects
Browse plants for this ecoregion
Greenthread is a cheerful annual wildflower with bright yellow daisy-like blooms and fine, thread-like foliage. It flowers prolifically from spring through fall, creating masses of color in sunny, dry locations. This drought-tolerant native readily self-seeds and naturalizes in informal garden areas.
Growing Greenthread
Grow Greenthread in full sun and low water. Mature plants reach 12 to 24 inches tall and spread 12 to 24 inches wide. Expect moderate maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Greenthread is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 2 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
- Requires seasonal replanting
- May have messy dieback
Wildlife value
The long blooming period provides nectar for butterflies and other beneficial insects from spring through fall. Seeds also attract small birds later in the season.
Common questions
- Where does Thelesperma filifolium naturally grow?
- Greenthread is native to the Great Plains and southwestern United States, including Arkansas, Colorado, Kansas, Louisiana, Missouri, Mississippi, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming.
- When does Greenthread bloom?
- Thelesperma filifolium has an exceptionally long blooming period, producing flowers from March through November in favorable conditions.
- What pollinators visit Greenthread flowers?
- Greenthread attracts butterflies and various nectar-feeding insects with its bright yellow flowers and long bloom season.
- What growing conditions does Thelesperma filifolium prefer?
- This native forb thrives in full sun locations with low water requirements, making it excellent for drought-tolerant landscaping and natural areas.
- Is Greenthread HOA-friendly?
- Greenthread is generally an HOA-friendly choice in the right placement, with moderate maintenance.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Does Greenthread fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.