Listen to your plants make music

The MIDI Sprout enables you "to listen to your plants play harmonious sounds" based on changes in conductivity on their leaves. From the company's background story:

The richness of this data inspired me to give plants full control over every note played as well as control over effects. I scaled the instruments into the key of C so the music was harmonious. I created parameters for the rate at which the instruments could be played to provide a resolution that was both musical and close to real time. Then I just let the plants do their thing.