Powdery Mildew- treating soil?
I just lost all my zucchini to powdery mildew, probably let it go too far before treating since I've never dealt with that before. I sprayed with anything I read about- baking soda, milk, tea tree oil, oregano oil, but it only got worse, and I pulled the plants last week. I need to learn from this before my next crop!
We're having a warm and dry winter in Phoenix, weatherwise I think it'd be fine to start some replacements now, but I'm worried about the PM. I see spots of it on random weeds in my yard, which I don't understand since it's not humid, and those have nothing BUT sun and airflow.
Would I be dooming my new plants if I started now, or is there no point in waiting? Should I bother spraying the soil with anything?
I always end up getting my best garden tips from this forum so I thought I'd ask you folks :)