American Holly (Ilex opaca) is a beautiful evergreen tree native to the eastern United States, prized for its glossy dark green foliage and vibrant red berries that brighten winter landscapes. A classic symbol of the holiday season, this long-lived tree provides year-round beauty, excellent wildlife habitat, and dense evergreen screening. American Holly is an outstanding choice for specimen plantings, privacy hedges, woodland gardens, and naturalized landscapes.
Botanical Information
- Botanical Name - Ilex opaca
- Common Name - American Holly
- Plant Family - Aquifoliaceae
- Plant Type - Evergreen Tree
- Life Cycle - Perennial
- Native Range - Eastern and Southeastern United States
- Mature Height - 30-50 feet
- Mature Spread - 15-30 feet
- Growth Rate - Slow to Moderate
- USDA Hardiness Zones - 5-9
- Sun Requirements - Full Sun to Partial Shade
- Soil Preference - Moist, well-drained sandy, loamy, or acidic soils
- Soil pH - 5.0-6.5
- Water Requirements - Moderate
- Drought Tolerance - Moderate once established
- Salt Tolerance - Low to Moderate
- Deer Resistance - Moderate
- Wildlife Value - Excellent food and shelter source for birds and small mammals
- Container Friendly - Suitable while young
- Landscape Uses - Privacy screens, specimen tree, woodland gardens, foundation plantings, wildlife gardens, and holiday landscapes
- Germination Rate - 60-80%
- Pre-Treatment Required - Seed requires up to one year of warm moist stratification followed by 90-120 days of cold moist stratification.
Germination Instructions
American Holly seeds have a naturally long dormancy period and require patience. Place seeds in a warm, moist medium for up to one year to allow embryo development. After the warm stratification period, transfer the seeds to cold moist stratification for 90-120 days. Sow the prepared seeds approximately 1/4 inch deep in a quality seed-starting mix, keep evenly moist, and use a humidity dome until germination begins. Germination may occur gradually over several weeks.
Growing Information
- Plant in a location with full sun to partial shade.
- Prefers fertile, moist, well-drained acidic soils.
- Water regularly during establishment.
- Apply mulch to conserve moisture and regulate soil temperatures.
- Female trees produce bright red berries when a male holly is nearby for pollination.
- Prune lightly to maintain shape or encourage dense growth.
- Excellent for year-round privacy and ornamental value.
- Long-lived tree capable of thriving for generations with minimal maintenance once established.
Seed Quantities Available
- 1 oz. - Approximately 1,500 Seeds