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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 + 1 CA province
Climate fit: moderate (69/100)
Focal point
Structure
Pollinator
Light
Full sun
Water
Low water
Mature size
2-4.5 ft tall · 3 ft 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 14 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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Educator packet

Plant packet
Soapweed yucca educator packet
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.
Scientific name
Yucca glauca
Plant type
shrub
Hardiness
4a-8b
Light
full-sun
Moisture
low
Spacing
36 inches
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.

Sources & citations

Cite this page
For lesson plans, articles, or research that uses this page. Use the source cards below to explore the references that informed this record.
Plotwright. (2026, May 17). Soapweed yucca (Yucca glauca). Retrieved 2026, August 20, from https://plotwright.com/plants/yucca-glauca
Sources used for this record
This record is compiled from the sources below.
Lady Bird Johnson Wildflower Center Native Plant Database
Botanical research database
USDA PLANTS Database
Government data source
GBIF
Botanical research database
Wikipedia (ecoregion articles)
Botanical research database
Wikimedia Commons
Photo · CC BY-SA 2.0
NC State Extension Gardener Plant Toolbox
University extension service