William Penn barberry

The William Penn barberry (Berberis x gladwynensis 'William Penn') is a low-maintenance shrub that requires less watering than other species. To ensure it receives the appropriate amount of moisture, water the shrub deeply once every 1-2 weeks during the spring and summer months. In the fall and winter, water just enough to keep the soil lightly moist, but not soggy. If there is no rainfall for more than 2 weeks, check the soil with your finger to make sure it is not too dry before watering. Allow the soil to dry out somewhat between waterings to avoid overwatering.

William Penn barberry prefers full sun or partial sun (at least 4 hours of direct light daily), so it should be planted in a location that receives plenty of direct sunlight throughout the day. It is recommended that when grown in a partial shade area, the plants should be sited in a location that receives morning or early afternoon sun. The ideal time frame for William Penn barberry is mid-spring through fall, when the plant receives the most amount of light. Too much direct sunlight in summer months may damage the plant, so it's important to keep the area well-watered during hot and dry periods. In winter months, William Penn barberry should not receive any direct sunlight as this can damage the evergreen foliage.

The William Penn barberry (Berberis x gladwynensis 'William Penn') should be pruned twice annually for best effect, once in early spring and once in mid-summer. Pruning should be light and should focus on removing thin branches, crossing branches, and keeping the form of the plant airy and open. The plants should also be monitored to ensure that any dead branches are removed. When pruning in the early spring, all the old canes should be cut back to the base of the plant. For the mid-summer pruning, focus on selectively thinning out a few growths here and there and removing dead wood.