Aquifoliaceae

winterberry holly

Ilex verticillata

Synonyms

Prinos verticillatus

Other Common Names

black alder, swamp winterberry

Plant Type

Shrub (less than 10 ft)

Life Cycle

Perennial

Typical Size

3-15 ft. tall
3-12 ft. wide

Tolerant of

Deer, Drought, Occasional Flooding

Propagation

By cutting

Plant Propagation Notes

Three to 4 inch softwood cuttings can be taken in early summer.

Plant Planting Notes

Provide at least 3′ spacing.

Plants/Diseases

No serious issues. May exhibit leaf spot or powdery mildew occasionally. Chlorosis may occur in soils that are too alkaline.

Wildlife Benefits

Nectar/pollen source for pollinating insects, Fruit/seeds for birds

Leaves

The simple, alternate leaves are oblanceolate, oblong, or obovate with serrate margins. Approximately 1.5-4 inches long.

Flowers

Small clusters of flowers grow from the leaf axils. Approximately 1/4 inch wide.

Fruit

Long lasting round drupes, about 1/4 inch diameter.

Bark

Gray to dark brown with knobby lenticels.

Toxicity

Low toxicity that may cause vomiting or diarrhea if ingested.

Ilex verticillata

USDA Hardiness Zones

3, 4, 5, 6, 7, 8, 9

Light Exposure

Full Sun, Part Sun/Shade, Full Shade

Soil Moisture

Moist

Soil Drainage

Well-drained

Soil pH

Acidic (less than 6.0), Neutral (6.0-8.0)

Native in South Carolina?

Yes

Plant Native Habitat

Bogs, pocosins, swampy forests.

Global Conservation Status (NatureServe)

Secure (G5)

Federal Conservation Status (USFWS)

Not Listed

Distribution Notes

Common throughout South Carolina