Temperature
55–85°F
Keep away from winter window glass and heating vents.
Spineless yucca
Yucca gigantea
Spineless yucca wants direct light and water every 14 to 24 days, once the top three inches are dry. Toxic to cats and dogs.
Light
Direct
LowMediumBright indirectDirect
A south or west window within four feet. In medium light it survives for years without putting on any height.
Water
Every 14–24 days
Baseline for a 6-inch pot indoors. Check first: water when the top three inches are dry, not on a schedule.
Humidity
20% and up
Fine in normal household air. Prefers 40%.
Difficulty
Easy
Scores 1 of 5: Scores 1 of 5: a woody trunk that stores water and tolerates being ignored for a month. Overwatering is the only common cause of death.
Habit
Upright
Grows to 36–120 inches. No support needed.
Toxic to cats and dogs — poison severity low
Contains saponins. Reported signs include vomiting, drooling, loss of appetite.
If a pet has chewed a leaf, rinse the mouth with water and call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435.
Full detail for cats → Full detail for dogs →
What each authority says 2 sources concur
- ASPCA — genus-level entry: Yucca spp.
- Toxic to cats and dogs · saponins
- NC State Extension
- Poison severity: Low · saponin
DISPLAY — in-content responsive
Light
Direct light. A south or west window within four feet. In medium light it survives for years without putting on any height.
Water
Every 14 to 24 days in a 6-inch pot, when the top three inches are dry.
Treat the interval as a starting point and the test as the actual instruction. Pot size, light level and season all move the number.
| Method | soak and dry |
|---|---|
| Test before watering | the top three inches are dry |
Soil and potting
Two parts potting soil, one part coarse sand, one part perlite.
Repot roughly every 3 years, or when roots come through the drainage holes and water runs straight through without absorbing.
Common problems
Ranked by how often each turns out to be the cause for this species. The individual diagnosis pages are not built yet.
- Brown crispy edges page not written yet
- Root rot page not written yet
- Yellow leaves page not written yet
Propagation
Stem cutting in soil. Roots in 28 to 56 days.
| Preferred method | stem cutting |
|---|---|
| Medium | soil |
| Time to root | 28–56 days |
| Node required | No |
| Best season | Spring and summer |
Sources
- ASPCA Animal Poison Control — Yucca spp. Checked 2026-09-11.
- North Carolina Extension Gardener Plant Toolbox — Yucca gigantea Checked 2026-09-11.
- Wikidata entity Q15507520 — taxonomy and entity identity.
- Royal Botanic Gardens Kew, Plants of the World Online — Yucca gigantea Accepted name; family Asparagaceae. Checked 2026-09-11.
- Photograph: Cillas, Wikimedia Commons , CC BY-SA 4.0.
Compiled and edited by Tony Valcarcel · 2026-09-02
Tony Valcarcel is the editor and publisher of this database, not a horticulturist
or a veterinarian. Every fact above is drawn from the sources listed, and
toxicity severity is reported only where one of them stated it.
How this is sourced.
Last updated 2026-09-02