Ilex verticillata (Winterberry)


Michael's Opinion

A shrub often planted for winter interest where its berries can make an outstanding show. Otherwise, it is a homely, back of the border type tramp.

Botanical Information

FamilyAquifoliaceae
GenusIlex
Speciesverticillata
CategoryWoody
TypeShrub (deciduous)
Pronunciation

Details

USDA Hardiness Zone3–6
USDA Hardiness Ref.
Canadian Hardiness Zone4–6
Canada Hardiness Ref.
RHS Hardiness Ref.
Height1.5– 3 m
Spread1.5–3 m
GrowthSlow
Flowering PeriodJune

Description and Growing Information

General DescriptionGreen leaves with red berries, needs both male and female parents to produce fruit, red berries present all winter long.
ID CharacteristicDeciduous, alternate leaves, red fruit may be present, multi-stemmed suckering habit, usually forming a clump.
ShapeOval.
PropagationEarly spring cuttings are best, although seed is another, but unreliable option.
CultivationGrows good in moist soils, in full sun to partial shade.
PestsTar spot, leaf spot, and powdery mildew.
Notable SpecimensThe A.M. (Mac) Cuddy Garden, Strathroy, Ontario.
HabitatSwamps and marshes, central USA and parts of Canada.
Bark/Stem DescriptionDark grey to dark brown, has a twist to it.
Flower/Leaf Bud DescriptionSmall 1.5 mm long, brown in colour, buds are smaller than leaf scar.
Leaf DescriptionLeaves are ovate, usually 4–6 cm long, dull dark green and somewhat pubescent.
Flower DescriptionMale – in clusters of 6 or more in axils; Females - less, single or in groups of three; flowers can be yellow, white/cream, and green/brown, not all that showy.
Fruit DescriptionIlex is dioecious with the drupe formation needing a nearby male plant. Lustrous, orange-red fruit that persist through the winter; 8 mm in size.
Colour DescriptionFlowers are yellow, white–cream, green–brown, the bark can be dark grey to brown, bright red berries in autumn.
Texture DescriptionMedium in summer and winter.

Photographs