Cook your egg shells till they turn brown. Dissolve the shells in white vinegar. Add white vinegar to water at 1000:1 ratio. Water soluble calcium. Calcium readily available
Supplement that with epsom salts as calcium needs magnessium to be absorved. I have a guide if youre interested. There are some things to consider like not closing the lid for the container to not explode until all the co2 is released.
Like with the lentil fertilizer, I was doing a batch of calcium for foliar or soil feeding and I decided to post the process here because it might be helpful for some people, wether because they have a sudden calcium deficiency, they want to give only calcium without magnessium or its a big...