Overwatering, magnesium sulfate deficiency, too many different things in the potting soil, just use potting soil only works for me do not overwater, fish kelp is good, along with Epsom salt water, not sprinkling on soil, drench with Epsom salt water 1 tablespoon to 1 gallon water. Place in adequate sunlight spot. Do not over fertilized!
Make yourself as serene as a flower, as a tree. And on wednesdays, as serene as this tiny ad:
A rocket mass heater heats your home with one tenth the wood of a conventional wood stove