#1 Sweet Gelato, White Widow, Blueberry

N deficiency is another yellow and is in grow stage, in flowering you can have easy P or K deficiency that are the elements that the plants eat more. Buy a PK booster and give the plant 1/2 recomended dose or less one time and water 3 times after and then u can repeat if u want and u can do it before if needed with maybe 1/4 dose max. Maybe some drops of calmag will be the top dressing, i love the biobizz one, very low cost and beautiful product, no N inside . Pk boosters there are a lot of product out there, make sure that not have N inside and to give the recomended dosage ( mine recomendation related to their) Hope to be useful and comprensive ✌️🏽

The color is ok , all organic nutrient and they have that colour. Only your solution is too strong , first to much grow, also too much of bloom, i will give only 1.5ml/l bloom 1ml/l topmax

Unless you can track it down to environemnt, most likely. Good circulation, even alotment of light and other resources etc etc... more likely genetics. It'll go away with some curing. As long as they don't dry too fast, they will turn out fine.