Blue Plum Festival is where summer begins in Johnson City! This FREE music festiBlue Plum Festival is where summer begins in Johnson City! This FREE music festival is back for the 26th year, and we're ready to bring the downtown Johnson City community out for two great days of music and fun. Bring your friends, your children and your dogs because Blue Plum Festival has something for everyone. Learn more at blueplum.org/festival. Save the date and stay tuned for more details!val is back for the 26th year, and we're ready to bring the downtown Johnson City community out for two great days of music and fun. Bring your friends, your children and your dogs because Blue Plum Festival has something...