Pattern is an effective means for making environmental factors legible. Following in the spirit of the Not Gardens, this project explores the potential of material retardants to render surface patterns. The use of digital media and fabrication technologies enables innovative methods for controlling the relationship between organic and inorganic materials or between fixed material and temporal phenomena. These tools provide simple means to craft patterns that perform in both visual and environmental terms. In this case, we used these techniques to produce an ephemeral pattern that becomes visible only during moments of precipitation. By enhancing the properties of a common landscape material, we can embed temporal change, thus producing a technique that offers an environmentally responsive expression.