Ilex glabra ‘Densa’ and Ilex glabra ‘Shamrock’ are two varieties of the same species, commonly known as inkberry or gallberry. While they share many similarities, there are some notable differences between the two.
1. Leaf Shape: One of the most obvious differences between Ilex glabra ‘Densa’ and ‘Shamrock’ is the shape of their leaves. ‘Densa’ has rounder and wider leaves compared to the more narrow and elongated leaves of ‘Shamrock’. This gives ‘Densa’ a fuller and more compact appearance.
2. Growth Habit: Another difference lies in their growth habit. ‘Densa’ tends to grow taller and denser, forming a more upright and bushy shrub. On the other hand, ‘Shamrock’ has a more spreading habit, with branches that tend to arch gracefully.
3. Size: In terms of size, ‘Densa’ can reach a height of around 5-6 feet (1.5-1.8 meters) and a similar spread, making it a relatively large shrub. ‘Shamrock’, on the other hand, is generally smaller, reaching a height of around 3-4 feet (0.9-1.2 meters) with a slightly wider spread.
4. Leaf Color: Both varieties have dark green leathery leaves, but the shade of green can vary slightly. ‘Densa’ often has a deeper, darker green color, while ‘Shamrock’ may exhibit a slightly lighter green hue.
5. Uses: Due to its taller and denser growth habit, Ilex glabra ‘Densa’ is often used as a hedge or screening plant to provide privacy or block unwanted views. Its fuller foliage makes it an excellent choice for creating a dense barrier. ‘Shamrock’, with its spreading habit and smaller size, is well-suited for groundcovers or as a low-maintenance shrub in borders and mass plantings.
6. Maintenance: Both varieties are relatively low-maintenance and adaptable to different soil types. They are also tolerant of wet conditions and can grow in both full sun and partial shade. However, regular pruning may be necessary to maintain the desired shape and size, especially for ‘Densa’, which has a tendency to grow taller and denser.
7. Wildlife Value: As members of the holly family, both ‘Densa’ and ‘Shamrock’ produce small black berries that are attractive to birds. These berries provide a valuable food source during the winter months when other food options may be scarce.
While Ilex glabra ‘Densa’ and ‘Shamrock’ belong to the same species, they exhibit distinct differences in leaf shape, growth habit, size, leaf color, uses, maintenance requirements, and wildlife value. These factors should be taken into consideration when selecting the appropriate variety for your specific gardening or landscaping needs.
