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Inkberry
A tough native evergreen holly with small, smooth, spineless, boxwood-like leaves - the leading native alternative to boxwood for hedges and foundations - that tolerates wet soil, feeds birds with black winter berries, and yields prized 'gallberry' honey.
Safety notes Inkberry is a native evergreen hedge and foundation shrub - a boxwood alternative - not a food or drink plant. Its black berries (on females) feed birds but, like other holly berries, are mildly toxic to people and to dogs, cats and horses; eating them causes vomiting and diarrhea. Plant it freely, but site berrying females with pets and small children in mind. The historic 'Appalachian tea' from the leaves is folk practice - holly foliage is not recommended as a beverage. Nothing here is food.
Overview
Inkberry (Ilex glabra) is a native evergreen holly increasingly planted as the go-to native alternative to boxwood. Unlike most hollies it has small, smooth, glossy, spineless dark-green leaves that give a fine, neat, boxwood-like texture year-round, and it shears well into hedges, foundation plantings, and edging - a handsome, adaptable evergreen for structure in the garden.
The one thing to knowInkberry (Ilex glabra) is a native evergreen holly increasingly planted as the go-to native alternative to boxwood.
Quick facts
- Sprouts in
- 180 daysRange: 60–540 days
- Soil temperature
- 70 °FRange: 60–78 °F
- Height
- 6 ftRange: 4–8 ft
- Spread
- 6 ftRange: 4–8 ft
- Cold
- Takes hard frostdamaged below -25°F
- Heat
- Struggles above 95°F
- Life cycle
- Perennial, lives about 40 years
- Save seeds
- About 180 days after plantingRange: 150–210 days
- Self-sows
- Yes, expect volunteers
- Soil
- Tolerates wet soil
- Water
- Medium
- Plant spacing
- 4 ftRange: 3–6 ft
When to plant
Fall sowing is open for 20 more days. Next: spring, Mar 27 to May 29.
- Direct sow Oct 11 – Nov 8 Open now · 20 days leftAbout 2 weeks before to 2 weeks after your first frost (Oct 25 here)Holly seed is slow and erratic (double dormancy, up to a year or more), so cuttings and transplants are far more practical than seed for this evergreen.
- Transplant Mar 27 – May 29 Opens in 159 daysAbout 2 weeks before to 7 weeks after your last frost (Apr 10 here)Plant container inkberry in spring into moist, acidic, well-drained-to-wet soil in full sun to part shade; it makes a fine native evergreen hedge. Plant a female with a male nearby for berries.
- Transplant Aug 16 – Sep 27 Opens in 301 daysAbout 10 weeks before to 4 weeks before your first frost (Oct 25 here)Fall planting works well in milder zones; keep the soil moist and mulch the roots until dormancy.
Frost here: last around Apr 10 (Mar 27 to Apr 24 most years), first around Oct 25. Zone averages, your own yard may run a week or two either way.
Life stages
Establish, grow, repeat
Getting established and returning each season are different parts of the story.
Stage 1 of 4 · Getting established
Years 1-2 - rooting in
The first year after planting
Care at this stage
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Keep evenly moist while establishing
Inkberry is a wetland-edge holly that likes moist, acidic soil - keep a new plant evenly watered through its first two years and never let it dry out badly. It tolerates wet ground and is more moisture-loving than boxwood, the shrub it often replaces.
-
Mulch and pick your form and sex
Mulch to conserve moisture and keep the roots cool. For the black berries (bird food), plant a female with a male nearby; for a pure evergreen hedge, sex does not matter. Named cultivars are nearly all female selections, so ask the nursery for a male by sex rather than by cultivar name. Inkberry suckers modestly and can get leggy at the base over time - choose compact cultivars for tidy hedges.
Months are typical seasonal windows; climate, variety, and plant age can shift them.
Watch out for
3 to know. None are high-risk for Inkberry. None are active in October.
Legginess & Bare BaseSeverity Medium DisorderSeason: Apr–JulBare, twiggy lower stems and an open, thin base on older plants, with foliage concentrated at the top.
Bare, twiggy lower stems and an open, thin base on older plants, with foliage concentrated at the top.
Prune to renew - cut back harder in late winter to force fuller regrowth from the base; the plant resprouts from old wood.
Choose naturally compact cultivars (Shamrock, Gem Box, Densa), and prune the interior and lower growth to encourage density from an early age.
Inkberry's most common shortcoming: with age, plants naturally lose their lower leaves and become open and leggy at the base, especially the straight species, detracting from its use as a full hedge.
No Berries (Dioecious / No Pollinator)Severity Low DisorderSeason: Nov–JanA healthy, flowering tree that never sets fruit year after year - either a male tree, or a female with no male nearby.
The named inkberry cultivars in the trade are nearly all female selections, so the male usually has to be sourced separately - nurseries often sell males unnamed or simply as 'male inkberry', and a seedling-grown species plant can be either sex. Ask for a male Ilex glabra by sex rather than by cultivar name, buy one in flower if you can, and plant it close enough that the same bees work both. One male serves several females.
A healthy, flowering tree that never sets fruit year after year - either a male tree, or a female with no male nearby.
Add a male pollinator (or graft a male branch onto a female tree, or plant a self-fruitful cultivar); nothing else will make a lone female or a male tree fruit.
Plant both a male and a female (or a self-fruitful cultivar like 'Meader'); when buying seedlings, expect roughly half to be non-fruiting males, and site a known male within pollination range of females.
American persimmon is usually dioecious - trees are male or female, and only females bear fruit, generally needing a male within a few hundred feet to pollinate them. A lone male, or a female with no pollinator, produces no crop, a common surprise for new growers.
Chlorosis (Alkaline or Dry Soil)Severity Low DisorderSeason: May–JulFronds paling to yellow-green while veins stay greener, weak stunted growth, especially in limy or high-pH soils.
Fronds paling to yellow-green while veins stay greener, weak stunted growth, especially in limy or high-pH soils.
Acidify the root zone with organic matter and appropriate soil amendments over time; in strongly alkaline ground, relocate the fern to a more acidic, wet spot.
Plant in naturally acidic soil, amend generously with organic matter, and mulch with acidifying materials like pine straw and leaf mold.
Yellowing between the leaf veins can appear in very alkaline soils, where the plant struggles to take up iron; wax myrtle prefers acidic to neutral ground and rarely needs feeding since it fixes nitrogen.
Good & bad neighbors
Plant nearby
-
Both love moist, acidic soil, so they pair naturally - inkberry's evergreen structure alongside blueberry's fruit and fall color in an acidic native planting.
-
Both thrive in wet sites, combining inkberry's evergreen hedge and honey-plant flowers with buttonbush's pollinator blooms around a pond edge or rain garden.
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Both tolerate moist to wet acidic soil, pairing inkberry's evergreen structure with sweetspire's fragrant flowers and fall color in a rain garden or damp native border.
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Two native evergreen hollies - inkberry with black berries and yaupon with red - blend well in an evergreen native hedge or border with staggered berry color for birds.
Varieties · 4
You pick one when you add Inkberry to your garden. Its days to maturity set your harvest window.
Inkberry (Ilex glabra)
The wild species: a native evergreen holly 5-8 feet tall with small, smooth, spineless glossy leaves, tolerant of wet acidic soil, dioecious (female plants bear black berries).
Variety details for Inkberry (Ilex glabra)
Rounded evergreen shrub with small smooth dark-green spineless leaves and, on females, small black berries.
speciesnativeevergreenboxwood-alternativeThe standard for native evergreen hedging and a famed gallberry honey plant; can get leggy at the base with age, so compact cultivars are often preferred.
Shamrock
A popular compact cultivar with a denser, more uniform, slower-growing habit that resists the legginess of the species better, staying full to the base longer.
Variety details for Shamrock
Compact, dense, rounded evergreen shrub with neat dark foliage, fuller at the base than the species.
cultivarcompactdenseslower-legginessA female clone that bears black berries with a pollinator nearby; a top choice for tidy native evergreen hedges.
Gem Box
A dwarf cultivar bred specifically as a boxwood look-alike: small dark leaves, a naturally dense, rounded, compact habit under 3 feet, and good density to the base - ideal for low hedges, edging, and foundation plantings replacing boxwood.
Variety details for Gem Box
Small, dense, rounded evergreen shrub closely resembling a boxwood ball, with fine dark leaves and small black berries when pollinated.
cultivardwarfboxwood-lookdenseIt is sold as a FEMALE selection, so it sets its small black berries only when a male inkberry grows nearby, and it will not pollinate anything itself. Holly sexes are easy to mislabel - if berries are the point, confirm the sex on the tag at purchase rather than assuming it.
Densa / Compacta
Compact female selections (such as 'Densa' and 'Compacta') that stay denser and lower than the species and bear black berries with a male nearby.
Variety details for Densa / Compacta
Dense, compact evergreen shrub with dark foliage and black berries on female plants.
cultivarcompactfemaleberriesReliable, well-behaved choices for berrying native evergreen hedges and masses with less legginess.
Grower tips
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