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Sium suave var. nipponicum , Botanical Gardens, Nikko, Graduate School of Science, The University of Tokyo, Tochigi pref., Japan

Photo: Qwert1234 (CC BY-SA 3.0), via Wikimedia Commons

Hemlock Waterparsnip

Sium suave

Hemlock Waterparsnip (Sium suave) is a landscape plant valued for its form and structure as much as its bloom. Hemlock Waterparsnip is sized and grown for a real yard, not a show bench. Match it to full sun to part shade and water it in for the first season while roots establish. One caveat: like any plant, its published range is a guideline, not a guarantee, for the specific microclimate of your yard. Given a spot that matches its light and water needs, it is a dependable, low-drama addition to the yard.

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Where to buy Hemlock Waterparsnip

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Hardiness range

A hardiness zone is not on file for this plant yet, and a ZIP-level fit check is not available for it.

How it does in your yard

HabitNot recorded
Hardiness zoneNot recorded
Native to the USNot recorded
ToxicityNot recorded

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Questions

Is Hemlock Waterparsnip native to the United States?

USDA PLANTS data does not record Hemlock Waterparsnip as native to the United States.

What USDA hardiness zone does Hemlock Waterparsnip need?

A minimum hardiness zone is not on file for Hemlock Waterparsnip yet.