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Santa Ana River woolly star ( Eriastrum densifolium sanctorum ) has gray-green stems and leaves. The bright blue flowers are up to 1.4 inches long and are contained in heads of about 20 blossoms each. This plant was listed as endangered on

Photo: Pacific Southwest Region U.S. Fish and Wildlife Service (Public domain), via Wikimedia Commons

Giant Woolstar

Eriastrum densifolium

Giant Woolstar (Eriastrum densifolium) is a landscape plant valued for its form and structure as much as its bloom. Giant Woolstar 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 Giant Woolstar

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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

Related plants

Questions

Is Giant Woolstar native to the United States?

USDA PLANTS data does not record Giant Woolstar as native to the United States.

What USDA hardiness zone does Giant Woolstar need?

A minimum hardiness zone is not on file for Giant Woolstar yet.