Roughstem Rosinweed
Silphium radulanative · Central Texas
Roughstem Rosinweed is a perennial wildflower native to Central Texas that grows 2–3 ft tall and 1 ft wide. It wants full sun or part shade and low water, and handles clay soil. Blooms yellow in Jun–Aug. Good for butterflies.
Will it grow in your yard?
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The facts
4 sources- Type
- Perennial wildflower
- Sun
- Full sun to part shade (5–8 hrs of direct sun)
- Water
- Low
- Height
- 2–3 ft
- Spread
- 1 ft
- Bloom
- Jun–Aug · yellow
- Foliage
- Deciduous or dies back in winter
- Soil
- Takes clay · recorded on clay, dry, loam, sand, well drained
- Wildlife
- Supports butterflies
Where it grows
Recorded in these EPA Level IV ecoregions in the Austin and Hill Country launch area:
Southern Post Oak SavannaFloodplains and Low Terraces
90 occurrence records in Central Texas (GBIF).
Can you buy it?
Also grows here — hard to find. Native and recorded growing in Central Texas, but not on the grower stock lists we read. Sourcing varies: some are stocked widely, others you will have to hunt for.