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shrub

Summer Holly

Comarostaphylis diversifolia

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Summer Holly (Comarostaphylis diversifolia) at Lakeshore Garden Centres

Summer Holly

Summer Holly

(Photo courtesy of NetPS Plant Finder)

Summer Holly (Comarostaphylis diversifolia) at Lakeshore Garden Centres

Summer Holly flowers

Summer Holly flowers

(Photo courtesy of NetPS Plant Finder)

Height:  20 feet

Spread:  15 feet

Sunlight:  full sun  partial shade 

Hardiness Zone:  8b

Description:

A highly attractive large shrub or small tree, producing lily-of-the-valley like flower clusters from mid-winter to early spring, followed by bright red berries in summer; prune to maintain size; a great water conservation choice, perfect for dry areas

Ornamental Features

Summer Holly features showy clusters of creamy white bell-shaped flowers at the ends of the branches from mid winter to early spring. It has attractive dark green evergreen foliage. The serrated oval leaves are highly ornamental and remain dark green throughout the winter. It features an abundance of magnificent red berries from early to mid summer. The shaggy brick red bark is extremely showy and adds significant winter interest.

Landscape Attributes

Summer Holly is an open multi-stemmed evergreen shrub with an upright spreading habit of growth. Its average texture blends into the landscape, but can be balanced by one or two finer or coarser trees or shrubs for an effective composition.

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, bees and butterflies to your yard, but is not particularly attractive to deer who tend to leave it alone in favor of tastier treats. It has no significant negative characteristics.

Summer Holly is recommended for the following landscape applications;

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

Planting & Growing

Summer Holly will grow to be about 20 feet tall at maturity, with a spread of 15 feet. It has a low canopy, and is suitable for planting under power lines. It grows at a medium rate, and under ideal conditions can be expected to live for 50 years or more.

This shrub does best in full sun to partial shade. It prefers dry to average moisture levels with very well-drained soil, and will often die in standing water. It is considered to be drought-tolerant, and thus makes an ideal choice for xeriscaping or the moisture-conserving landscape. It is not particular as to soil pH, but grows best in poor soils, and is able to handle environmental salt. It is somewhat tolerant of urban pollution. This species is native to parts of North America.

Summer 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. It is even sizeable enough that it can be grown alone in a suitable container. 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. Be aware that in our climate, most plants cannot be expected to survive the winter if left in containers outdoors, and this plant is no exception. Contact our experts for more information on how to protect it over the winter months.

This plant is not reliably hardy in our region, and certain restrictions may apply; contact the store for more information.

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Accent  Massing  Screening  Garden  Container 
Applications
Flowers  Fruit  Foliage Color  Bark  Winter Value  Attracts Wildlife 
Ornamental Features