Several root rot diseases affect pansies. Symptoms show up as yellowing of lower foliage with….

Purplish new growth on a stunted, weak and wilting plant. Black root rot (thielaviopsis) is a difficult fungal disease to control. It will occur when soil is too wet with standing water or poor drainage. Heat stress can also be a factor as well as high soil ph. A ph range of 5.5-5.8 is better.