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!
Every time you till, you lose 30% of your organic matter. But this tiny ad is durable:
permaculture bootcamp - gardening gardeners; grow the food you eat and build your own home