Grow Your Garden


American Holly (Ilex opaca)

  • American Holly (Ilex Opaca) http://www.sagebud.com/american-holly-ilex-opaca
    Credit: Thisisbossi | Own work | License: CC-BY-SA-2.5
  • American Holly (Ilex Opaca) http://www.sagebud.com/american-holly-ilex-opaca
    Credit: Photo (c)2007 Derek Ramsey (Ram-Man) | Own Picture. | License: GFDL-1.2
  • American Holly (Ilex Opaca) http://www.sagebud.com/american-holly-ilex-opaca
    Credit: Photo (c)2007 Derek Ramsey (Ram-Man) | Own Picture. | License: GFDL-1.2
  • American Holly (Ilex Opaca) http://www.sagebud.com/american-holly-ilex-opaca
    Credit: Photo (c)2007 Derek Ramsey (Ram-Man) | Own Picture. | License: GFDL-1.2
  • American Holly (Ilex Opaca) http://www.sagebud.com/american-holly-ilex-opaca
    Credit: Original uploader was Jaknouse at en.wikipedia | Originally from en.wikipedia; description page is/was here. | License: CC-BY-SA-3.0-migrated-with-disclaimers GFDL-en
  • American Holly (Ilex Opaca) http://www.sagebud.com/american-holly-ilex-opaca
    Credit: Original uploader was Jaknouse at en.wikipedia | Originally from en.wikipedia; description page is/was here. | License: CC-BY-SA-3.0-migrated GFDL
  • American Holly (Ilex Opaca) http://www.sagebud.com/american-holly-ilex-opaca
    Credit: Original uploader was Jaknouse at en.wikipedia | Originally from en.wikipedia; description page is/was here. | License: PD USDA NRCS
ILOP.jpg

Ilex Opaca, or more commonly know as American Holly, is a tree shrub with green foliage and yellow flowers of the genus Ilex. It has a slow growth rate and a height of 60 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring and summer, blooms during mid spring and is tolerant of shade. Ilex Opaca or American Holly's floral region is North America US Lower 48, specifically in the states of Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Massachusetts, Maryland, Maine, Missouri, Mississippi, North Carolina, New Jersey, New York, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas and Virginia.

  • Category: Dicot
  • Genus: Ilex
  • Family: Aquifoliaceae
  • Order: Celastrales
  • Class: Magnoliopsida
  • Division: Magnoliophyta
  • Duration: Perennial
  • Growth Habit: Tree Shrub
  • Native Status: L48 (N)
  • State T/E Status: NY (EV) PA (T)
  • State T/E Common Name: NY (American holly) PA (American holly)
  • National Wetland Indicator Status: FACU FAC-
  • Regional Wetland Indicator Status: 1(FACU+) 2(FAC-) 3(FACU+) 6(FACU)
  • Active Growth Period: Spring and Summer
  • Allelopath: No
  • Bloat: None
  • C:N Ratio: High
  • Coppice Potential: No
  • Fall Conspicuous: Yes
  • Fire Resistance: No
  • Flower Color: Yellow
  • Flower Conspicuous: No
  • Foliage Color: Green
  • Foliage Porosity Summer: Dense
  • Foliage Porosity Winter: Dense
  • Foliage Texture: Coarse
  • Fruit/Seed Color: Red
  • Fruit/Seed Conspicuous: Yes
  • Growth Form: Single Stem
  • Growth Rate: Slow
  • Height at 20 Years Maximum (feet): 20
  • Height Mature (feet): 60
  • Leaf Retention: Yes
  • Lifespan: Moderate
  • Low Growing Grass: No
  • Resprout Ability: Yes
  • Shape and Orientation: Erect
  • Toxicity: None
  • Adapted to Coarse Textured Soils: No
  • Adapted to Fine Textured Soils: Yes
  • Adapted to Medium Textured Soils: Yes
  • Anaerobic Tolerance: Low
  • CaCO3 Tolerance: Low
  • Cold Stratification Required: Yes
  • Drought Tolerance: Medium
  • Fertility Requirement: Medium
  • Fire Tolerance: Low
  • Frost Free Days Minimum: 140
  • Hedge Tolerance: Medium
  • Moisture Use: Medium
  • pH (Minimum): 4
  • pH (Maximum): 7.5
  • Planting Density per Acre Minimum: 300
  • Planting Density per Acre Maximum: 800
  • Precipitation (Minimum): 36
  • Precipitation (Maximum): 60
  • Root Depth Minimum (inches): 30
  • Salinity Tolerance: Low
  • Shade Tolerance: Tolerant
  • Temperature Minimum (°F): -18
  • Bloom Period: Mid Spring
  • Commercial Availability: Routinely Available
  • Fruit/Seed Abundance: Low
  • Fruit/Seed Period Begin: Summer
  • Fruit/Seed Period End: Fall
  • Fruit/Seed Persistence: Yes
  • Propagated by Bare Root: Yes
  • Propagated by Bulbs: No
  • Propagated by Container: Yes
  • Propagated by Corms: No
  • Propagated by Cuttings: Yes
  • Propagated by Seed: Yes
  • Propagated by Sod: No
  • Propagated by Sprigs: No
  • Propagated by Tubers: No
  • Seed per Pound: 28430
  • Seed Spread Rate: Slow
  • Seedling Vigor: Low
  • Small Grain: No
  • Vegetative Spread Rate: None




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