The leaves started turning yellow a week ago and there are more and more of them. At first, it was at the bottom, now it's getting higher and higher. Can I give some emergency Bio Bizz Bio Grow?
You are out of the growth stage. The lowest leafs are just a causality of energy/food war going on with your plant.
As for the yellowing. You need a PK boost. Idk if the growth will have enough PK in it but it won't hurt, get niobium bloom or some PK booster . Really you need bloom but if you only have grow then yes, give her some feeds it might help a little but you need pk.
Good luck.
“those leaves are almost at the point of becoming n toxic. i wouldnt use grow nutrients at this point. you have slightly yellowish tint to one leaf as i see it and not a nitrogen deficiency in general.
if you have it add some biobizz alg-a-mic for some micro nutrients or some kelp extract and just a very tiny bit of fulvic acid.
they dont look unhealthy atm.”