Bonide Captain Jack's 16 oz Liquid Copper Fungicide Ready-to-Use Spray for Organic Gardening

I used this in combination with a hydrogen peroxide bottom soak for a powdery mildew solution after moving my plants indoors for the winter. It worked for all of my plants, except the flap jack plants. This isn't unexpected as kalanchoe are the top species for susceptibility to powdery mildew. For them I would have had to use something more aggressive. For my staghorn, which has susceptibility, it cleared up completely. I likely got to the kalanchoe too late and should have been using preventative measures prior to moving them indoors. Regardless, I'm pleased with the product and results, recommend it, and will purchase it again.

If you have an especially rainy and hot year like we've had here, you're liable to have to deal with fungus on some of your garden. I have to say I was impressed with this product. It killed the fungus that started on my squash leaves rapidly. It can't get any easier to use than this. No mixing required. Just open the spray nozzle, aim, and pump!