Back in 2009, the artist, Jeff Schmuki created "Chia Sculptures and Interventions" pictured here.
He said, "Using Chia in my work has created another means of engaging the public. The novelty of the Chia Pet™ and the nutritious and easily grown Chia super-grain inspires projects that utilize Chia as both an art form and a sustainable food source. Creating soil-less works which employ Chia, as well as other food plants, allows me to demonstrate the benefits offered by hydroponics. These benefits include an increases in crop yields, lower water usage, as well as the fact that hydroponics can be used in places* where ordinary agriculture or gardening is impossible."
Jeff continues to create art using plants, but apparently hasn't worked with chia seeds recently.