By Allison Scarbrough. Contributing Editor. HART — What began as a small, road-side fruit stand measuring less than 200 square feet has flourished into a 2,000-square-foot produce market that thrives on farm-fresh food, friendly and knowledgeable service and a fun atmosphere. Rennhack Orchards Market, located on Polk Road across from Hansen Foods, is a great place for locals and tourists…