This article discusses how to work around Colorado's water use laws when managing stormwater.

This database is a collection of nurseries, community services and professionals.

This database is searchable by state and planting characteristics, and provides a great list of native plants.

This website sells regional evapotranspiration data for Minnesota, Wisconsin, Michigan, Ohio, Indiana, Illinois, Iowa, Missouri and Kentucky.

Evapotranspiration data for New York State.

Evapotranspiration and other irrigation information for greater Seattle.

Irrigation information for Texas.

Rainfall and evapotranspiration data for the Front Range, to aid in the prediction of irrigation needs.

A brief guide to keeping drip systems working.

A good overview of why and how a project should use water-efficient landscaping, with case studies.