Plant Profile: Berberis aquifolium

'Oregon Grapeholly' is a medium-sized evergreen shrub that can reach heights of up to 10 feet. It has a mostly upright growth habit with minimal branching and tends to develop cane-like stems that sucker and create colonies. This plant is drought-resistant and grows slowly, but it is known for producing suckers and forming clusters. It thrives best in light shade, as exposure to full sun can cause its color to fade, and it is sensitive to summer heat. However, it does need a few hours of sunlight each day to produce flowers.

In early spring, it showcases 2-3 inch racemes of yellow flowers that are both mildly fragrant and visually striking. By summer, the shrub is adorned with clusters of small, blue-black berries that are waxy in texture and may remain on the branches until December.

The leaves are glossy and resemble those of holly, turning a purplish-bronze hue in winter. The fruits, which are dark blue to purple, grow in grape-like clusters, although this shrub is neither a grape nor a holly. It is recognized as Oregon's state flower, which is reflected in its common name, and belongs to the barberry family, Berberidaceae. Many consider it one of the finest garden shrubs for eastern landscapes, and it was included in the collection from the Lewis and Clark Expedition.

For optimal growth, it is recommended to plant this shrub in small groups within shaded or woodland gardens. It also performs well as a standalone specimen or in foundation plantings and shrub borders. However, it does not thrive in highly alkaline soils, as it can become chlorotic in high pH conditions and suffer from desiccating winds. Additionally, this plant is susceptible to various pest issues.

Insects, diseases, and other plant-related problems include leaf spots, rust, and leaf scorch caused by sun or wind exposure. Chlorosis can occur in high pH soils, leading to burned-looking leaves, although the stems will typically regenerate leaves in the following spring.

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