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PlantFiles: Kidneyleaf Rosinweed
Silphium compositum

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Silphium (SIL-phee-um) (Info)
Species: compositum (kom-POZ-ee-tum) (Info)

One vendor has this plant for sale.


4-6 ft. (1.2-1.8 m)

Unknown - Tell us

USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun
Sun to Partial Shade

Unknown - Tell us

Bloom Color:
Bright Yellow

Bloom Time:
Mid Summer
Late Summer/Early Fall
Mid Fall


Other details:
This plant is attractive to bees, butterflies and/or birds

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By KanapahaLEW
Thumbnail #1 of Silphium compositum by KanapahaLEW

By KanapahaLEW
Thumbnail #2 of Silphium compositum by KanapahaLEW

By KanapahaLEW
Thumbnail #3 of Silphium compositum by KanapahaLEW

By KanapahaLEW
Thumbnail #4 of Silphium compositum by KanapahaLEW


1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive KanapahaLEW On Jun 6, 2011, KanapahaLEW from Alachua, FL (Zone 8b) wrote:

This plant grows naturally on my property a few miles northwest of Gainesville FL. It grows in utterly dry, infertile, powdery, acid (pH = 5.7) sandy soil. It is in open areas at woods edges, getting some sun daily and being in bright shade most of the time. Despite the common name, the leaves are deeply-dissected, several occurring in a basal rosette and being 14" to 18" long, with a few scattered along the 4-foot tall flowering stalk and rapidly becoming smaller as one goes up the stalk. The large and woody taproot allows it to survive in dry soil, but reportedly the taproot is not in evidence if it grows where there is ample water available. For several weeks it produces a succession of bright yellow 2" - 2 1/2" flowers typical of Asteraceae. Propagation is by seed, which probably needs 30 to 60 days of cold stratification like other Silphiums. My ID is based on herbarium specimens at


This plant has been said to grow in the following regions:

Gainesville, Florida
Oldsmar, Florida
Murphy, North Carolina

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