Fast Flowering Royal Cheese Photoperiod

High bro, the cause for this symptom is due a magnesium deficiency. And the magnesium deficiency is almost always caused by incorrect pH. Because you are using a living soil you can use a Bio pH adjuster like Biobizz pH min to bring down the pH from the feed water. This product does not harm the useful bacteria and fungi inside the living soil. Enjoy your grow buddy!