# Vegetation Parameters ![](/files/-Mihr_lVHmFWgJRyyd6K) ![](/files/-Mihr_lWWldYPYtS05zF) - [\[source code\]](https://github.com/ladybug-tools/dragonfly-grasshopper/blob/master/dragonfly_grasshopper/src//DF%20Vegetation%20Parameters.py) Create VegetationParameters representing the behavior of vegetation within an urban area. ## Inputs * **albedo** A number between 0 and 1 that represents the ratio of reflected radiation from vegetated surfaces to incident radiation upon them. (Default: 0.25) * **start\_month** An integer from 1 to 12 that represents the month at which vegetation evapostranspiration begins (leaves come out). By default, the month will be automatically determined by analyzing the epw to see which months have an average monthly temperature above 10C. * **end\_month** An integer from 1 to 12 that represents the month at which vegetation evapostranspiration ends (leaves fall off). By default, the month will be automatically determined by analyzing the epw to see which months have an average monthly temperature above 10C. * **tree\_latent** A number between 0 and 1 that represents the the fraction of absorbed solar energy by trees that is given off as latent heat (evapotranspiration). Currently, this does not affect the moisture balance in the uwg but it will affect the temperature. (Default: 0.7). * **grass\_latent** A number between 0 and 1 that represents the the fraction of absorbed solar energy by grass that is given off as latent heat (evapotranspiration). Currently, this does not affect the moisture balance in the uwg but it will affect the temperature. (Default: 0.5). ## Outputs * **veg\_par** Vegetation parameters that can be plugged into the "DF UWG Simulation Parameter" component to specify the behavior of vegetation in the simulation. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.ladybug.tools/dragonfly-primer/components/6_alternativeweather/vegetation_parameters.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.