American Holly 'Clarendon' is a slow-growing, pyramidal evergreen shrub that reaches 15 to 30 feet in cultivation, though wild specimens may tower to 50 feet. Native to the eastern and central U.S., from Massachusetts south to Florida and Texas, this shrub thrives in zones 5 through 9 and adapts to full sun or partial shade. Hardy and low maintenance, it produces insignificant flowers in May and June followed by showy, bird-attracting fruit that persists through winter. Sources report mature dimensions ranging from 15 to 30 feet tall and 10 to 20 feet wide, though some measurements vary.
Partial Sun
Moderate
5-9
360in H x 240in W
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High
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This evergreen shrub evolved in the moist woodlands and swamp margins of eastern America, where it naturally inhabits bottomlands and forest edges from coastal dunes to inland forests. Its dense pyramidal form and persistent red berries have made it a cornerstone of American winter gardens for generations. American Holly handles deer pressure without damage, tolerates clay soil and urban conditions, and performs reliably with minimal care once established. The slow, steady growth habit means patience is rewarded with a substantial, long-lived shrub that only becomes more attractive with age.
American Holly serves primarily as an ornamental shrub, valued for its year-round evergreen structure and striking winter fruit display. It excels as a formal or informal hedge, screening, or specimen planting in areas where its eventual size can be accommodated. The berries are edible but are traditionally used for decoration rather than consumption. Birds, including robins and cedar waxwings, rely heavily on the fruit as a winter food source, making this plant an excellent choice for wildlife gardens and bird-focused landscapes.
No timeline data available yet for this variety.
Transplant container-grown American Holly in spring or fall, choosing a location with full sun to partial shade and protection from cold winter winds. Space plants 10 to 20 feet apart depending on desired mature width. Dig a hole as deep as the root ball and twice as wide, working acidic soil amendment into the planting area if soil is neutral or alkaline. Backfill gently and water thoroughly to settle soil.
The berries are technically harvestable within 40 to 45 days of bloom completion, though they are typically left on the plant throughout winter for ornamental effect and wildlife food. If harvesting for decoration, cut stems once berries are fully colored deep red and firm. Berries persist on the plant through much of winter, providing long-lasting visual interest.
Minimal pruning is required for American Holly's naturally pyramidal form. Remove dead, diseased, or crossing branches as needed to maintain the elegant upright structure. Light shaping in early spring will direct growth without damaging next season's berry production. Avoid heavy pruning, as this species grows slowly and will take years to recover from aggressive cutting.
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“American Holly's story is deeply rooted in the eastern woodlands of North America. The species Ilex opaca naturally occurs across a vast range, from Massachusetts and the Atlantic Coast down through West Virginia, Ohio, and the Midwest to Texas and Florida. Early European colonists encountered this native shrub in moist woods, forest bottomlands, swamp peripheries, and coastal dunes, including the famous Cape Cod populations. The plant's evergreen foliage and winter berries aligned perfectly with Old World customs, and American Holly quickly became integrated into holiday traditions and ornamental landscapes. The 'Clarendon' cultivar represents generations of cultivation and selection within this native species, refined for performance in home gardens across a broad hardiness range.”