Them Cookiez

Hi there mate it seems that this particular soil mix tends to be a bit low on the ph scale and a small side dressing of Dolomite lime is usually beneficial. Maybe it tends to be more of an issue during flower because your plants are eating up certain nutrients within the soil thus raising or lowering the ph. I also found a link to others having your problem check it out https://forum.grasscity.com/threads/roots-organic-soil-problems.785317/ Hope I have helped mate