Ok so my plants are outdoors and have been in flower for about 3 weeks. A few of them just suddenly started to turn real yellow so i gave them some ferts i have been using fox farm big bloom and also tiger bloom. so when i went to check on them yesterday i noticed that the ones that were yellow are now like yellow with puple on the leaves. I understand this is probably nitrogen def or lockout but i want to know if there is anything that i can do to get these girls green again. they still need another 4 weeks but going how they are now i am wondering if they will even make it. And another question some of them have gotten a very dark purple color to the leaves, which is also some sort of (def) not sure what tho. Thanks