What is Reddit's opinion of Bonide Sulfur Plant Fungicide Dust, 4 lbs?

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Greenhouses are humid. Most plants don't mind. You'll likely be most concerned with grey mold (botrytis). So: clean up any and all dead plant material. I finally solved my mold problems with a very light dose of sulphur: just mixed a small amount with water and sprayed down everything: floor, walls, benches. And with circulation: a cheap box fan from lowes or home depot should be running all the time.

Before you try mechanical intervention, do your research. Running a dehumidifier 24/7 is like running a giant heater, and it gets real expensive right quick.

Use some Sulfur it has a lot of beneficial uses for it but it is a natural plant fungicide 100% organic. It has instructions on the back very simple to use add water and shake it up and you’re ready to go.

Bonide (BND1428) - Sulfur Plant Fungicide, Organically Controls Rust, Leaf Spot and Powdery Mildew (4 lb.) https://www.amazon.com/dp/B0035H7V34/ref=cm_sw_r_cp_api_glt_fabc_PMTRWKYMHN93M9GV6XBV

Amazon or a local nursery. You want micronized sulphur not pellets.

I use this brand and have paid almost as much for the 1 pound shaker container.

If I am rooting something I'll use Eric Myers rooting sulphur. It's an add-on only item but he has a few things worth grabbing for sure. You get super vigorous rooting with it.

Bonide Sulfur Plant Fungicide Dust, 4 lbs https://www.amazon.com/dp/B0035H7V34/ref=cm_sw_r_apan_glt_i_WH6HDRPHPWG2YT7GJ4PG