Stiff Greenthread (Thelesperma Filifolium) is a annual herb in the Asteraceae family with easy care difficulty. It requires low watering and full sun or partial shade light in USDA hardiness zones 5-10. This plant is safe for cats and dogs.

Thelesperma filifolium is a slender, branched-stemmed wildflower with thread-like leaves and bright yellow flowers, commonly found in prairies and open spaces.

Stiff Greenthread

Stiff Greenthread

Thelesperma Filifolium

Thelesperma filifolium is a slender, branched-stemmed wildflower with thread-like leaves and bright yellow flowers, commonly found in prairies and open spaces.

Quick Facts

Type
herb
Lifecycle
annual
Care Difficulty
Easy
Water Needs
Low
Light
Full Sun, Partial Shade
Hardiness Zones
5-10

Safety

🐕
Pet Safe
👶
Child Safe
Non-Toxic

Growing Conditions

Soil Types:sandy, loamy, gravelly
Indoor:No
Outdoor:Yes
Garden Use:specimen, groundcover, erosion control, pollinator support

Care Calendar

Monthly care tasks for Stiff Greenthread

Jan
Prune
Feb
Fertilize
Mar
Repot
Apr
Water+
May
...
Jun
...
Jul
...
Aug
...
Sep
...
Oct
...
Nov
...
Dec
...

Expert Care Tips

Pro tips from botanists and plant experts

Watering Tip

Check soil moisture by inserting your finger 1 inch deep. Water only when the top layer feels dry to prevent overwatering.

Humidity Trick

Group plants together to create...

Growth Hack

Rotate your plant every...

Photo Gallery10+ photos

Stiff Greenthread
Stiff Greenthread detail

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Taxonomy

Family:Asteraceae
Genus:Thelesperma