Many people have been asking me why the mold count continues to be so high, despite the lack of rain. There are several reasons. Certain types of outdoor mold (especially Alternaria tenuis) love this very hot weather. Plants distressed from the hot, dry weather are more vulnerable to attack from molds. Alternaria can be found in soils and compost piles. And, the simple act of watering your yard is enough to active the mold spores. Here's what Alternaria tenuis looks like under a microscope.

-Mark Murray

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