Inkberry
Ilex glabra
Inkberry (Ilex glabra) is the native evergreen shrub that does the job boxwood is usually asked to do, and does it on ground boxwood would die on. It is a slow, upright-rounded, five-to-eight-foot broadleaf evergreen of the eastern coastal plain, with small smooth-edged glossy leaves and none of the spines the genus is known for - so it reads as a soft green mass rather than a holly. Its fruit is the surprise: pea-sized drupes that ripen jet black, not red, which is where the name comes from and which makes it the odd one out in this group. It is hardy from zone 4 to 9, tolerates wet soil, erosion, rabbits, deer and city conditions, and Missouri Botanical Garden lists it for rain gardens and low hedging. Two things to plan for. It needs acid soil and goes chlorotic on lime. And it is stoloniferous - it spreads by suckers into a colony, which is a feature in a naturalized planting and a nuisance in a tidy foundation bed.
Native: 20 US states
Climate fit: broad (79/100)
Structure
Border
Light
Full sun / Part shade
Water
Consistent moisture
Mature size
5-8 ft tall · 5 ft apart
Hardy in zones
4a-9b
very cold to frosty winters
Native in Illinois
No
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Native across 20 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.
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Where this plant fits
Suitable across 39 ecoregions - 35 climate-resilient through 2070 · 1 suited today · 3 newly possible by 2070. Best matches first.
Similar plants
Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
Educator packet
Plant packet
Inkberry educator packet
Inkberry (Ilex glabra) is the native evergreen shrub that does the job boxwood is usually asked to do, and does it on ground boxwood would die on. It is a slow, upright-rounded, five-to-eight-foot broadleaf evergreen of the eastern coastal plain, with small smooth-edged glossy leaves and none of the spines the genus is known for - so it reads as a soft green mass rather than a holly. Its fruit is the surprise: pea-sized drupes that ripen jet black, not red, which is where the name comes from and which makes it the odd one out in this group. It is hardy from zone 4 to 9, tolerates wet soil, erosion, rabbits, deer and city conditions, and Missouri Botanical Garden lists it for rain gardens and low hedging. Two things to plan for. It needs acid soil and goes chlorotic on lime. And it is stoloniferous - it spreads by suckers into a colony, which is a feature in a naturalized planting and a nuisance in a tidy foundation bed.
Scientific name
Ilex glabra
Plant type
shrub
Hardiness
4a-9b
Light
full-sun, part-shade
Moisture
consistent
Spacing
60 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). Inkberry (Ilex glabra). Retrieved 2026, August 20, from https://plotwright.com/plants/ilex-glabra
Sources used for this record
This record is compiled from the sources below.
Lady Bird Johnson Wildflower Center Native Plant Database
Botanical research database





