Melting out is the more serious of the two diseases. Initially, its symptoms are similar to those of leaf spot. But as the disease progresses, the fungus works its way to a plant's base and attacks the crown and roots.
Leaf spot and melting out disease in bluegrass lawns is a good example. One of the most common of the bluegrass problems, this fungus-caused disease is most active in the spring after cool, moist weather.
Leaf Spot and Melting Out in Turf
Leptosphaerulina Blight of Turf
Necrotic Ring Spot of Turf
Nightcrawlers
Powdery Mildew in the Home Lawn
Pythium Blight of Turf
Septoria Leaf Spot of Turf
Slime Molds
Snow Molds in Lawns
Stinkhorns ...
I have grown Jacobs Ladder or Polemonium for many years and actually stopped growing them when the breeders "improved" them and made them too tender in the winter and too prone to "melting out" in the summer heat.
  
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