Plant Database

shrub

Sky Sentry Japanese Holly

Ilex crenata 'Sky Sentry'

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Sky Sentry Japanese Holly (Ilex crenata 'Sky Sentry') at GardenWorks

Sky Sentry Japanese Holly

Sky Sentry Japanese Holly

(Photo courtesy of NetPS Plant Finder)

Sky Sentry Japanese Holly (Ilex crenata 'Sky Sentry') at GardenWorks

Sky Sentry Japanese Holly foliage

Sky Sentry Japanese Holly foliage

(Photo courtesy of NetPS Plant Finder)

Height:  10 feet

Spread:  3 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  5a

Other Names:  Sky Pencil Japanese Holly, Box-leaved Holly

Description:

Prized for its narrow, towering form, this shrub makes a bold statement when planted in a container or as a focal point; glossy leaves and abundant black berries during winter; perfect for smaller landscapes

Ornamental Features

Sky Sentry Japanese Holly is primarily grown for its highly ornamental fruit. It features an abundance of magnificent black berries in late fall. It has attractive dark green foliage. The small glossy oval leaves are highly ornamental and remain dark green throughout the winter. The flowers are not ornamentally significant.

Landscape Attributes

Sky Sentry Japanese Holly is a dense multi-stemmed evergreen shrub with a narrowly upright and columnar growth habit. Its relatively fine texture sets it apart from other landscape plants with less refined foliage.

This is a relatively low maintenance shrub, and is best pruned in late winter once the threat of extreme cold has passed. It is a good choice for attracting birds and bees to your yard. It has no significant negative characteristics.

Sky Sentry Japanese Holly is recommended for the following landscape applications;

  • Accent
  • Vertical Accent
  • Hedges/Screening
  • General Garden Use
  • Container Planting

Planting & Growing

Sky Sentry Japanese Holly will grow to be about 10 feet tall at maturity, with a spread of 3 feet. It has a low canopy with a typical clearance of 1 foot from the ground, and is suitable for planting under power lines. It grows at a slow rate, and under ideal conditions can be expected to live for approximately 30 years.

This shrub does best in full sun to partial shade. It prefers to grow in moist to wet soil, and will even tolerate some standing water. It is particular about its soil conditions, with a strong preference for rich, acidic soils. It is quite intolerant of urban pollution, therefore inner city or urban streetside plantings are best avoided, and will benefit from being planted in a relatively sheltered location. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. This is a selected variety of a species not originally from North America.

Sky Sentry Japanese Holly makes a fine choice for the outdoor landscape, but it is also well-suited for use in outdoor pots and containers. Its large size and upright habit of growth lend it for use as a solitary accent, or in a composition surrounded by smaller plants around the base and those that spill over the edges. Note that when grown in a container, it may not perform exactly as indicated on the tag - this is to be expected. Also note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

 
 
Hardiness Zone Plant Height Minimum Sunlight Soil pH Preference
Characteristics
Accent  Articulation  Screening  Garden  Container 
Applications
Fruit  Foliage Color  Texture  Plant Form  Winter Value  Attracts Wildlife 
Ornamental Features


Disclaimer - This Plant Database is an online catalog representing many of the varieties that we carry over the course of the season, and is intended for informational purposes only. Inventory varies seasonally, so we cannot guarantee that every plant will be in stock at all times - please contact your favourite GardenWorks location directly for current availability. It does not include our entire inventory of plants, so be sure to visit GardenWorks to see varieties that may not be represented on this list.