Answer: Thanks for your understanding re: our technical difficulties, and for reposting your question!
Beebalm (Mondarda) is usually a strong grower, and generally trouble-free, aside from being succeptible to powdery mildew. It sounds as though the crown of the plant suffered damage or disease during the winter/spring, perhaps from the fungus Pellicularia rolfsii. In general, fertilizer and excess moisture can make diseases worse. If your beebalm begins to grow poorly again this season, I suggest that you replace it with a healthy specimen that is certified disease free, and plant it in a different location. Hope it recovers!
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