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Compact Oregon Grape

Mahonia aquifolium 'Compacta'

Berberis aquifolium ‘Compacta’ in March 2013. Photo: SK Reid.
Berberis aquifolium ‘Compacta’ in March 2013. Photo: SK Reid.

Summary

The 40% ETo treatment yielded consistently the highest quality ratings, though there were no differences between treatments in relative growth.  Since flowering occurred before treatments were applied, it cannot be correlated to irrigation in a 2-year trial.

Shasta and both San Diego County locations gave this species low overall appearance ratings for the year and did not recommend it.  As mentioned before, native species can be slow to establish, and given better growing conditions and time, they may have changed their final recommendations.

Basic Info

Submitted by: UC Davis Arboretum
Trial Exposure: 50% Shade
Year evaluated: 2013
Height & Width
(after 2 years):
28" x 3' - UC Davis
Reported Height & Width
(at maturity):
2-3' x 3-4'
WUCOLS plant type: Gc S N A
Water Needs & WUCOLS Region:
Medium - Region 2 
Mean Overall 
Appearance rating:
(1-5 Scale, 5 is highest)
4.0 - UC Davis 
Flowering Months
March, April, June - UC Davis

Growth and Quality Data

Click Here for Complete Data Set

Berberis aquifolium ‘Compacta’ in August 2013 on 20% ET0 (no water). Photo: SK Reid.
Berberis aquifolium ‘Compacta’ in August 2013 on 20% ET0 (no water). Photo: SK Reid.