I've recently started collecting succulents and have been pretty dedicated since last fall. Unfortunately, one of my succulents from October just got hit with powdery mildew. I'm worried it might have spread from another affected plant. I've sprayed some neem oil and quarantined it in my garage, but now almost five of my other succulents (echeverias, aeoniums, and sedums) also have it. I'm really unsure about how to stop this from spreading!
3 Answers
I had a similar issue and found that using powdered sulfur really helped me out. Just buy it from any hardware store, mix it with water in a spray bottle, and cover all your plants. Make sure you have fans on high to dry out any moisture overnight. By morning, all you should see is a light layer of sulfur left behind. It helps eliminate active infections and keeps new spores from taking hold.
You might want to consider a stronger fungicide like copper or sulfur. Also, powdery mildew grows best in cool, damp conditions, so try to improve air circulation and keep them in a warm, sunny spot. This change can really make a difference!
That's great advice! Just remember, if you open a window for airflow, it might let in more spores if they're outside. You could try keeping your plants in a well-ventilated area but maybe avoid direct drafts if you're worried about bringing in spores.