My opinion is that African Violets, under the right conditions, can virtually live forever. I had a beautiful 'purple bloom' Optimara from Walmart for at least 25 years. Friends thought it was fake for how beautifully it bloomed at times. I kept it in a northern window (no direct sunlight)...watered, fertilized and repotted as needed. However, the last time I repotted it, I think there was something wrong with the soil (maybe the wrong type or contaminated?) I don't know for sure. The leaves never recovered from it and it my 'once gorgeous plant' went into the compost. (Sigh).