Holly Leaved Barberry

For optimal growth, Holly Leaved Barberry (Mahonia aquifolium) should be watered every 2 to 3 days during the Growing Season (Spring - Fall). During the spring time, this could mean watering 2 to 3 times a week but require frequent monitoring of the soil moisture to determine the exact amount of water needed. During the summer months, the plant should be watered about once a week, depending on the temperature and amount of rainfall received. During the winter months, water only when the soil begins to dry out. Water thoroughly, allowing water to easily move through the soil, and be sure to water until the soil is soaked through. An added layer of mulch can help conserve moisture in the soil.

Holly Leaved Barberry (Mahonia aquifolium) prefers to grow in areas with bright sunlight for at least 6 hours per day. This plant species can handle partial shade but will not thrive without some direct light. It is best to provide a few hours of morning light and a few hours of afternoon light for best performance. If grown in an exposed or sunny area, afternoon shade will help protect the plant from hot summer temperatures.

Holly Leaved Barberry (Mahonia aquifolium) is best pruned in late winter or early spring before new growth begins. Pruning should start when the plants are 3 to 4 years old, and then annually after that. Start by thinning long branches, making sure to cut close to the trunk and leaving a few buds in the branch's axil. This will encourage more lateral growth. Dead, diseased or damaged branches should be removed, as they provide entry points for disease and pests. To create a bushier and denser plant, you can selectively prune 1-third of older branches to the ground each year. For a hedge, prune the tops of Mahonia aquifolium to create a natural slope and encourage side branching while keeping the plant compact.