Which factor is NOT part of the WUCOLS plant water use classification?

• A. Slope and Elevation
• B. Soil Texture
• C. Mature Plant Size
• D. Plant Function

Answer: (B)

Soil texture is not a part of the WUCOLS (Water Use Classification of Landscape Species) plant water use classification system. WUCOLS focuses on factors that directly impact how much water plants typically use. The classification includes aspects such as slope and elevation, which can influence microclimates and water availability, as well as mature plant size and plant function, both of which provide insight into a plant's water requirements based on its growth habits and ecological roles.

In the context of the WUCOLS system, soil texture—while important for understanding plant growth and water retention—does not directly relate to the classification of plants based on their water consumption. Thus, knowing the categorization based on slope, elevation, size, and function allows gardeners and landscapers to make informed decisions about plant selection for water efficiency. Recognizing what factors are considered versus what are not is vital for effective landscape management in terms of water use.