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Native Plant Guide

Information and Services for King County, Washington


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cow-parsnip in bloom
© Greg Rabourn
cow-parsnip in bloom (enlarge)
cow-parsnip flower

Heracleum lanatum

Perennial Groundcover

Height: 8 ft.

Availability: Low

Growing ease: Medium

Moisture req.: moist - wet

Exposure req.: sun - shade


Plant description:

Huge perennial that with large leaves and huge umbrella of white flowers. Very dramatic in the back of a landscape where it can receive sufficient moisture. Its sap can cause rashes and burns so avoid planting where this may be a problem. Also known as Heracleum maximum.

Keywords: perennial (non-woody), upright, white