How much sun does Kidneyleaf rosinweed need?

Kidneyleaf rosinweed grows best in full sun conditions.

When does Kidneyleaf rosinweed bloom?

Kidneyleaf rosinweed blooms in June, July, and August.

Where is Kidneyleaf rosinweed native?

Kidneyleaf rosinweed (Silphium compositum) is native to AL, FL, GA, NC and 3 more states, per the World Checklist of Vascular Plants (Kew).

What pollinators does Kidneyleaf rosinweed attract?

Kidneyleaf rosinweed draws native bees and butterflies.

Kidneyleaf rosinweed

Name: Pollinator Patch
Author: Pollinator Patch

Silphium compositum

Last reviewed: October 2026

Kidneyleaf rosinweed (Silphium compositum) is a perennial forb native to AL, FL, GA, NC and 3 more states. It blooms in June, July, and August. The flowers draw native bees and butterflies.

Toxicity unknown

Kidneyleaf rosinweed (Silphium compositum) 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

36"–72" H × 24"–36" W

Bloom

Jun, Jul, Aug

Native to

AL, FL, GA, NC and 3 more states

Pollinators

native bees, butterflies

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

Piedmont Middle Atlantic Coastal Plain Southeastern Plains Blue Ridge Ridge and Valley Eastern Temperate Forests Southern Coastal Plain

A tall perennial with large, deeply lobed basal leaves and a branching flower stalk topped with bright yellow, sunflower-like blooms in summer. The bold basal leaves and tall stalk can look coarse and flop in rich soil.

Growing Kidneyleaf rosinweed

Grow Kidneyleaf rosinweed in full sun and low water. Mature plants reach 36 to 72 inches tall and spread 24 to 36 inches wide.

Wildlife value

Its summer flowers are a good nectar source for native bees and butterflies.

Common questions

How much sun does Kidneyleaf rosinweed need?: Kidneyleaf rosinweed grows best in full sun conditions.
When does Kidneyleaf rosinweed bloom?: Kidneyleaf rosinweed blooms in June, July, and August.
Where is Kidneyleaf rosinweed native?: Kidneyleaf rosinweed (Silphium compositum) is native to AL, FL, GA, NC and 3 more states, per the World Checklist of Vascular Plants (Kew).
What pollinators does Kidneyleaf rosinweed attract?: Kidneyleaf rosinweed draws native 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 Kidneyleaf rosinweed? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

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