Re: yellow edges?
I've struggled with mine over the winter. I checked the soil with a meter for pH, moisture and light and all came up fine. Then found the problem to be under the leaves ... spider mites. That problem seemed to never end until I got the humidifier out and had that pointed at the plants. (but not too close) They all perked right up and mites stayed gone. Everything I've read is to start with checking the soil, look under the leaves and go from there.
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