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Inkberry Inkberry Holly

Ilex glabra

Aquifoliaceae · broadleaf · introduced

Inkberry is the native evergreen holly that provides year-round structure without the sharp, spiny leaves of traditional hollies. The foliage is smooth-edged, dark green, and glossy, refined rather than aggressive, on a suckering shrub that grows five to eight feet tall. Female plants produce small black berries in fall that persist through winter, which is where the common name originates. Native from Nova Scotia to Florida and west to Missouri and Texas, inkberry grows naturally in wet, acidic sites, swamps, bogs, and moist lowland woods.

In Western Washington, inkberry is one of the best evergreen shrubs for wet sites. It handles the poorly drained, acidic clay soils that challenge most broadleaf evergreens, and it tolerates seasonal flooding without complaint. That wet-site tolerance makes it ideal for rain gardens, bioswales, and the low spots in residential landscapes where other hollies would fail. 'Shamrock' is the standard compact selection, staying dense and rounded at three to four feet. One disease and one pest are tracked, nothing that threatens healthy specimens. The suckering habit means it will colonize an area over time, which you either manage with pruning or use intentionally for mass plantings. For a native, evergreen, wet-tolerant screening shrub, inkberry fills a niche that few other plants can match.

Quick Facts

Height
8 ft
Spread
6 ft
Growth Rate
Slow
Light
Full Sun
Soil
Wet Tolerant
Water
High
Hardiness
Zone Zones 6a–9b
Bloom Time
May to June
Origin
Nova Scotia to Florida and west to Missouri, Mississippi

Phenological Calendar

Stage Typical Window
New growth flush BBCH 11 May 15-Jun 15
Bloom start BBCH 61 Mar 15-May 15
Bloom end / petal fall BBCH 69 Apr 15-May 31
Fruit/seed development BBCH 71 Jun 1-Aug 31
Fruit/seed maturity BBCH 85 Sep 1-Nov 30

Diseases (9)

Pests (11)

Cultivars (2)

Shamrock
Common name: Shamrock Inkberry; Mature height: 3–5 ft
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