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Soapweed yucca

Soapweed yucca

Yucca glauca
A hardy, evergreen Great Plains yucca that holds a low rosette of narrow, pale blue-green dagger-like leaves and sends up a 4 1/2-foot stalk of pendulous, greenish-white bell flowers in early summer. Extremely drought- and poor-soil tolerant, it depends on an obligate mutualism with the yucca (Pronuba) moth — the only insect that pollinates it — so seed is not produced every year. The root has long been used to make soap, giving the plant its common name.
Native: 13 US states + 2 CA provinces
Climate fit: broad (70/100)
Focal point
Structure
Pollinator
Light
Full sun
Water
Low water
Mature size
24-54" tall · 36" apart
Hardy in zones
4a-8b
very cold to frosty winters
AHS heat range
1-11
Plant range authored in AHS heat-zone terms.
Native in Illinois
No

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Native across 15 US states and Canadian provinces — a wide-ranging part of North America's plant communities.

Cold hardiness

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
Well-suited today and still thriving in 2050.

Heat tolerance

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...

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Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
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Border
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Focal point
Border
Structure
Pollinator

Sources & citations

Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Soapweed yucca (Yucca glauca). Retrieved 2026, June 24, from https://plotwright.com/plants/yucca-glauca
Sources for every fact
Every fact on this page traces to a source. 18 fields cited - 18 source-backed.
Lady Bird Johnson Wildflower Center Native Plant Database
Botanical research database
Backs 17 fields
Identity
Summary
Plant type
Light
Moisture
Hardiness
Heat zone
Size
Spacing
Habit
Design roles
Seasonal interest
Growth stages
Lifecycle
Regional guidance
Success tips
Designer notes
Wikimedia Commons
Photo · CC BY-SA 2.0
Backs 1 field
Image
NC State Extension Gardener Plant Toolbox
University extension service