Roughstem rosinweed
Silphium radula
Last reviewed: July 2026
Light
full sun
Water
medium
Size
36"–72" H × 24"–36" W
Bloom
Jun, Jul, Aug, Sep
Native to
TX, LA, AR, OK and 2 more states
Pollinators
bees, butterflies, beetles
Browse plants for this ecoregion
A tall, upright perennial forb with rough, sandpaper-textured leaves and bright yellow, sunflower-like flower heads held on branching stems in summer. Develops a deep root system that supports strong drought tolerance once established.
In an HOA neighborhood
Roughstem rosinweed is an HOA-friendly choice in the right placement. Maintenance level: moderate. Tidiness: 2 out of 5.
Works well in: mid zone, backyard only.
- Tall coarse growth habit may read as weedy to HOA reviewers if not maintained in a defined bed
Wildlife value
Host plant for Silvery checkerspot butterfly.
Flowers attract bees, butterflies, and beetles; the plant serves as a larval host for the silvery checkerspot butterfly, and seed heads feed birds in fall and winter.
Common questions
- How much sun does Roughstem rosinweed need?
- Roughstem rosinweed grows best in full sun conditions.
- When does Roughstem rosinweed bloom?
- Roughstem rosinweed blooms in June, July, August, and September.
- Where is Roughstem rosinweed native?
- Roughstem rosinweed (Silphium radula) is native to TX, LA, AR, OK and 2 more states, per the USDA PLANTS Database and regional native plant society lists.
- What butterflies or moths does Roughstem rosinweed host?
- Roughstem rosinweed is a larval host plant for Silvery checkerspot butterfly.
- Is Roughstem rosinweed HOA-friendly?
- Roughstem rosinweed 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 Roughstem rosinweed fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.