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Silphium albiflorum
JLBG @ Juniper Level Botanic Gdn, NC

Silphium albiflorum

White Rosinweed

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Item #: 14271

Zones: 5a to 9b

Dormancy: Winter

Height: 36" tall

Culture: Sun

Origin: United States

Pot Size: 3.5" pot (24 fl. oz/0.7 L) ?

PDN Guarantee

Did someone mention a white-flowering silphium? This odd duck in an otherwise yellow-flowered genus is an endemic to calcareous (pH ~6.8) gravely prairie soils in a couple dozen central Texas counties. The basal fuzzy green rickrack patterned leaves, which always align in a North/South orientation, resemble a really funky head of stringy green hair topped by 2-3' tall flower spikes in late spring, each ending in clusters of large white asters, and the accompanying butterflies. The drought tolerance of Silphium albiflorum is legendary, with root length measured at a whopping 15' depth.

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