I noticed my plants are wrinckly and are in Calcium deficiency, I have CalCarb by Xtreme Gardening, but the instructions says to do a foliar spray but can I add it as a Soil Drench
Foliar feeding is not without its risks...
Putting it into the soil for the roots is a better option in my opinion.
It is all about your grow medium. If/your/using/rich/potting/soil/then/you/should/not need fertilizer or additives.