Handsome columnar holly. The Castle Ilex are compact, pyramidal varieties of blue holly. Dark glossy leaves, superior vigor and branching make them an improvement over other older varieties. Their narrow form makes them great for hedges, foundation plantings, or even as a dramatic specimen. The lustrous green foliage provides season long interest. Use Castle Wall® holly as the pollinator for Castle Spire holly, or grow it on its own as a narrow hedge. This is a male variety that will not produce fruit.