How much sun does Whorled rosinweed need?

Whorled rosinweed grows best in full sun conditions.

When does Whorled rosinweed bloom?

Whorled rosinweed blooms in July, August, and September.

Where is Whorled rosinweed native?

Whorled rosinweed (Silphium trifoliatum) is native to AL, GA, IL, IN and 10 more states, per the World Checklist of Vascular Plants (Kew).

What pollinators does Whorled rosinweed attract?

Whorled rosinweed draws bees and butterflies.

Whorled rosinweed

Name: Pollinator Patch
Author: Pollinator Patch

Silphium trifoliatum

Last reviewed: October 2026

Whorled rosinweed (Silphium trifoliatum) is a perennial forb native to AL, GA, IL, IN and 10 more states. It blooms in July, August, and September. The flowers draw bees and butterflies.

Toxicity unknown

Whorled rosinweed (Silphium trifoliatum) 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

medium

Size

36"–84" H × 24"–36" W

Bloom

Jul, Aug, Sep

Native to

AL, GA, IL, IN and 10 more states

Pollinators

bees, butterflies

Before you buy

Your city may pay you to plant this

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

Piedmont Erie Drift Plain Northern Piedmont Southeastern Plains Ridge and Valley Eastern Temperate Forests Central Appalachians Western Allegheny Plateau Interior Plateau

A tall, sturdy perennial with leaves arranged in distinctive whorls of three along an upright stem, topped by bright yellow daisy flowers in summer. Forms a bold, structural clump in open woodland edges and prairie.

Growing Whorled rosinweed

Grow Whorled rosinweed in full sun and medium water. Mature plants reach 36 to 84 inches tall and spread 24 to 36 inches wide.

Wildlife value

Abundant summer flowers provide nectar for bees and butterflies, and the seeds are eaten by goldfinches and other seed-eating birds.

Common questions

How much sun does Whorled rosinweed need?: Whorled rosinweed grows best in full sun conditions.
When does Whorled rosinweed bloom?: Whorled rosinweed blooms in July, August, and September.
Where is Whorled rosinweed native?: Whorled rosinweed (Silphium trifoliatum) is native to AL, GA, IL, IN and 10 more states, per the World Checklist of Vascular Plants (Kew).
What pollinators does Whorled rosinweed attract?: Whorled rosinweed draws bees and butterflies.

Native range data from the World Checklist of Vascular Plants (Kew). 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.

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Ready to grow Whorled rosinweed? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

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