If the wilting leaves are shriveled and brown the butterfly bush is suffering from lack of water. The spores can survive in the leaf litter on the soil surface and spread easily with the wind. Information On Butterfly Bush Pruning What does an overwatered plant look like. Why is my butterfly bush wilting . The butterfly bush needs water during its growth season in early spring and during dry spells throughout the season. If the wilting leaves are shriveled and green the shrub suffers from herbicide toxicity. Tried removing spent blooms new blooms were still punny. Disease is another concern when you see butterfly bush leaves turning yellow. If the wilting leaves are shriveled and brown the butterfly bush is suffering from lack of water. Downy mildew is caused by a number of fungi and creates furry white to black patches on the undersides of butterfly bush leaves and stems. If the wilting leaves are shriveled and brown the butterfly bush is suffering from lack of w
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