I've just been out to pick some lemon balm for lemon balm & mint cordial, and saw these spots on quite a few leaves. There are plenty without it, and they tend to appear on the lower down leaves, closer to the ground.
My LB bush was transplanted as a raggedy refugee from my parents' garden nearby in June or July. It's produced gorgeous new growth over the summer and is now, apart from these spots, a really healthy-looking and nicely-grown plant.
Does anyone know what it is or what I need to do? Or will winter take care of it?
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