I have a fungus on my 4 year old peonies (that started out blooming in early June). They have developed white mold and black spots on leaves and stems. It has rained constantly for two months. I fear that the soil may have a fungus. I sprayed with a fungacide but think it was too late. I was told not to cut the plant as it needed leaves to produce chloraphyll for next year. I love these plants and sure do not want ot lose them. I did cut off soome dead leaves but was waiting till the fall to cut to ground. What is your advice?