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PlantFiles: Winterberry Holly, Black Alder
Ilex verticillata 'Aquinnah'

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Family: Aquifoliaceae (a-kwee-foh-lee-AY-see-ee) (Info)
Genus: Ilex (EYE-leks) (Info)
Species: verticillata (ver-ti-si-LAH-tuh) (Info)
Cultivar: Aquinnah
Hybridized by Polly Hill; Year of Registration or Introduction: 1991

Category:
Shrubs

Height:
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)

Spacing:
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)

Hardiness:
USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Full Sun
Sun to Partial Shade
Light Shade

Danger:
N/A

Bloom Color:
White/Near White

Bloom Time:
Late Spring/Early Summer

Foliage:
Deciduous
Smooth-Textured

Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Very high moisture needs; suitable for bogs and water gardens
Provides winter interest

Soil pH requirements:
4.6 to 5.0 (highly acidic)
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Non-patented

Propagation Methods:
From softwood cuttings
From semi-hardwood cuttings
By simple layering

Seed Collecting:
Remove fleshy coating on seeds before storing
Properly cleaned, seed can be successfully stored
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Profile:

1 positive
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive ViburnumValley On Jan 25, 2012, ViburnumValley from Scott County, KY (Zone 5b) wrote:

'Aquinnah' Winterberry Holly is another one of many excellent plants evaluated and selected by the late Polly Hill of Martha's Vineyard. This is one of the few of her choice plants that I have yet to acquire.

'Aquinnah' forms deep reddish fruit that are reasonably persistent. This selection needs no additional assistance other than reasonable moisture during the driest times in the growing season. Like all winterberries, it prefers wetness and acid soils on the sandy side.

Polly Hill left quite a legacy of horticultural endeavor at her property (formerly Barnard's Inn Farm, now Polly Hill Arboretum), and the series of winterberries she named rank up there with the showiest plants for landscape interest during those cold bleak months when gardens can seem too dreary to enjoy.

Regional...

This plant has been said to grow in the following regions:

Crestwood, Kentucky
West Tisbury, Massachusetts



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