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Pollinate Happiness
Native to the Northeast, the Mid-Atlantic, the Southeast, and beyond

Winterberry holly

Ilex verticillata

Tiny June flowers feed small bees; brilliant red berries feed robins, bluebirds, and waxwings all winter. Needs a male pollinator plant.

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Scale and context

One plant, several views

Shrub 6–10 ft. Flowers ¼ in; berries ¼ in. These photos are all one individual, photographed in New York, US in June 2020, so you can see how a close-up relates to the whole plant.

Who it feeds

Its tiny June flowers feed small bees; its berries persist into winter and feed robins, bluebirds, cedar waxwings, mockingbirds, and more than 40 other bird species when little else is left.

What it does for the place

A wetland shrub that holds wet soil, tolerates flooding, and provides emergency winter bird food.

The story

The deciduous holly of eastern wetlands, whose bare red-berried branches have decorated New England homes at Christmas for centuries. The Iroquois used the bark as a fever remedy, hence the old name feverbush.

Worth knowing

  • Plants are male or female; you need one male for every several females to get berries.
  • The berries are mildly toxic to people.
  • Birds usually wait until after a few freezes soften the fruit.

Saving its seed

Ripe: Oct, Nov. Berries bright red and slightly soft.

Collect: Clean pulp off in water; seed sinks.

Sow: Rarely grown from seed; divide or take cuttings instead. Give it about 180 days of cold-moist stratification. Double dormancy: seed can take two winters to sprout. Softwood cuttings in early summer are the practical route. Prairie Moon's code for it is cold, then warm, then a second cold period (60 to 90 days each), best started outdoors in fall.

Cold-stratification days follow Prairie Moon Nursery's January 2026 germination codes where that nursery lists the species; others follow common nursery practice. Protocols vary with seed lot and supplier, so check your seed packet.

Seed saving calendar for your zip code →

Plant it instead of

  • Japanese barberry: Forms thorny thickets in the forest understory, raises soil pH, and creates humid microclimates that harbor far more Lyme-carrying ticks than native shrubs do.
  • Autumn olive: Once planted for wildlife and erosion control; fixes nitrogen and overwhelms open habitats, and birds spread the fruit widely.
  • Bush honeysuckles: Leaf out early and drop late, shading out spring wildflowers; their berries are junk food for migrating birds.

Sources and further reading