I'm operating on my limited experience, all the info I've read on TV, and various academic resources.
I feel like whatever is causing the wilt is native to the area. We can attempt to crowd it with a healthy soil inhabitants. And on top of that we can give our plants all they need to withstand infection. I have a feeling it's going to be a long hard fought battle.
A new bed wouldn't have an established microbial web and would be a great host to the bad guys.
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