Possumhaw
Ilex decidua
- Native to:
- Mexico, United States
Agnieszka Kwiecień, Nova






Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Aquifoliaceae
- Genus:
- Ilex
- Species:
- Ilex decidua
- USDA Symbol:
- ILDE
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Shrub , Tree
- Height:
- 900 cm
- Light Requirements:
- Full Sun,Part Shade
- Drought Tolerance:
- Medium
- Bloom Months:
- apr,may
- Bloom Colors:
- white
- Landscaping Shrub:
- Yes
Wildlife Benefits
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Keystone Species Ranking
- Caterpillar Keystone:
- ★★★★☆ Butterfly & moth species supported by this genus (NWF)
- Pollen Specialist Bee Keystone:
- ★☆☆☆☆ Native pollen specialist bee species supported by this genus (NWF)
Host Plant for Caterpillars
Fall webworm (Hyphantria cunea), pawpaw sphinx (Dolba hyloeus), Red-banded leafroller (Argyrotaenia velutinana)
Reported Fauna Sightings
Moths:Fall webworm (Hyphantria cunea), pawpaw sphinx (Dolba hyloeus)
Garden & Ecology Notes
- Wildlife Value:
- birds, small mammals
- Deer Resistant:
- Yes
- Fall Color:
- yellow
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Resprouts from roots and crown following fire. Common in bottomland forests with periodic fire regimes.
Soil Requirements
- Soil Type:
- moist, fertile, well-drained loamy soil
- pH:
- 5.5 - 7.0 (slightly acidic to neutral)
- Drainage:
- tolerates poor drainage
- Moisture:
- consistently moist
- Notes:
- Prefers floodplain and bottomland areas
Propagation & Germination
- Stratification:
- Warm then cold/moist stratification (double dormancy) — 150–240 days
- Germination Time:
- 30–90 days
- Notes:
- Seeds exhibit double dormancy requiring warm stratification followed by cold stratification. May take two years to germinate in natural conditions.
The above propagation data sourced from Claude AI
Pre-treatment: None required
Establishment: Seeds exhibit deep dormancy and do not germinate until the second year. Seeds are purchased from local people who collect within a 50 mile radius of the nursery. Ilex species are dioecious. Female plants bear bright red to red-orange fruits that mature during fall months.
Source: npn.rngr.net
ORGHPS Germination Guide: Expose to fluctuating outdoor winter temps incl. freezing for 3 months. Increase light/temp in spring.