The phrase refers to plants that can be substituted for a specific cultivar of Ilex crenata, known for its narrow, upright growth habit. These substitutes often provide similar aesthetic qualities, such as a columnar form and evergreen foliage, but may offer different attributes regarding disease resistance, hardiness, or maintenance requirements. Examples might include other holly varieties, junipers, or even certain types of boxwood that have been carefully pruned to achieve a similar silhouette.
Finding suitable replacements is valuable for several reasons. A planting site may not be ideal for the original choice due to soil conditions, climate limitations, or susceptibility to prevalent pests or diseases in the region. Moreover, diversifying plant selections can enhance landscape resilience and reduce the risk of widespread problems associated with monoculture plantings. Historically, gardeners have always sought alternatives to overcome limitations and adapt to specific environmental factors.