Approach

My thought from the beginning was to provide a way to measure the moisture content and then water the plant.  However, I wanted to take this a step further.  I initially thought of using a sound detector to process musical input.  Being a musician myself, I thought this would be a good way to take care of the plant while also nudging me to practice my guitar.  However, after a little more thought, I opened up the scope to include speaking to the plant as well.  This also fits into the old wive's tale that speaking to a plant (in and of itself) helps the plant to be healthier.