How much sun does Rosinweed Sunflower need?

Rosinweed Sunflower grows best in full sun conditions.

When does Rosinweed Sunflower bloom?

Rosinweed Sunflower blooms in June, July, August, September, October, and November.

Where is Rosinweed Sunflower native?

Rosinweed Sunflower (Silphium radula var. gracile) is native to TX, per vouchered herbarium specimen records and regional native plant society lists.

What pollinators does Rosinweed Sunflower attract?

Rosinweed Sunflower draws butterflies and bees.

Is Rosinweed Sunflower HOA-friendly?

Rosinweed Sunflower is generally an HOA-friendly choice in the right placement, with low maintenance.

Rosinweed Sunflower

Name: Pollinator Patch
Author: Pollinator Patch

Silphium radula var. gracile

Last reviewed: October 2026

Toxicity unknown

Rosinweed Sunflower (Silphium radula var. gracile) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

full sun

Water

low

Size

24"–36" H × 6"–12" W

Bloom

Jun, Jul, Aug, Sep, Oct, Nov

Native to

Pollinators

butterflies, bees

Before you buy

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Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 458 programs across 44 states, each with a link to the provider and the date we last checked it.

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Browse plants for this ecoregion

Texas Blackland Prairies East Central Texas Plains Western Gulf Coastal Plain South Central Plains

Rosinweed Sunflower is a tall native perennial that produces bright yellow daisy-like flowers from summer through late fall. This drought-tolerant plant forms narrow clumps and provides reliable color during the hottest months when many other plants struggle.

In an HOA neighborhood

Rosinweed Sunflower is an HOA-friendly choice. Maintenance level: low. Tidiness: 3 out of 5.

Works well in: front yard, foundation, street edge, mid zone.

Wildlife value

The long bloom period makes this an excellent pollinator plant, attracting butterflies and native bees throughout the growing season. Seeds also provide food for birds in winter.

Common questions

How much sun does Rosinweed Sunflower need?: Rosinweed Sunflower grows best in full sun conditions.
When does Rosinweed Sunflower bloom?: Rosinweed Sunflower blooms in June, July, August, September, October, and November.
Where is Rosinweed Sunflower native?: Rosinweed Sunflower (Silphium radula var. gracile) is native to TX, per vouchered herbarium specimen records and regional native plant society lists.
What pollinators does Rosinweed Sunflower attract?: Rosinweed Sunflower draws butterflies and bees.
Is Rosinweed Sunflower HOA-friendly?: Rosinweed Sunflower is generally an HOA-friendly choice in the right placement, with low maintenance.

Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

See all plant problem guides

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