Genus Ilex Species x meserveae Cultivar 'Heckenstar' Castle Wallâ„¢ Common Name Castle Wallâ„¢ Holly Patent ID pp# 14308 Height 5 to 8 Feet Spread 4 to 5 Feet Habit Broad-columnar habit. Moderate growth rate. Zone 5 to 8 Culture Full sun to partial shade. Flower Small, white, in spring. Flower Color Foliage Glossy, dark green with spines. Evergreen. Categories: Evergreen Shrub Holly Proven Winners® Color Choice Description Use to pollinate ‘Castle Spire’. A broad-columnar shaped male blue holly with lustrous dark green leaves.