What's wrong with my basil?
I'm growing basil in a large container on my back porch - have for the past 3 years and it's always done well. This year started out nicely with a huge, healthy bushy plant as usual. I've gotten 3 big bunches out of the plant already, enough to make pesto.
Now, all of a sudden, many of the leaves have brown/black spots on them, the ones that are really bad look yellowish brown. What's weird is that the unhealthy looking leaves are interspersed with healthy looking leaves.
So weird. I haven't seen any pests, but just to be sure I used some Organicide. No help so far. Any thoughts on what this could be?