Certified GKH Gardening Expert
Any pictures would be very helpful. The first thing I would check is the pH. dolomitic lime (I like Agri-pel, and in Tennessee it is only 5 dollars for a 40 lb bag. This will stabilize the pH of the soil) Other issues could include over fertilization, Overwatering, or incorect temperature. I believe it likely to be incorrect pH, Over fertilization though. Check first.