help plz

the new leaves on my plants are turning yellow from the back of the leaves to the tips but the tips are still green . the old leaves are fully yellow and dieing . help me plz

hard to say. are you feeding it? you will have to post a picture to get proper feedback

pics? stage of growth? more info would be nice. strain? humidity?

they are outside and about 3 foot tall id say 2 and a half mounths old. i feed thim with fox farm. even the the soil is ocean fox farm. i follow the feeding cart to the tee. im in alabama so theres alot of humidity is high. there are six different types growing like acapulco gold, caramelo, critical sensia star, afghan cush mixed with white widow , northern lights mixed with big bud, and blue mist. there all doing it.and agen my new leaves are yellowing from the end to the tips but the tips are still green (even the vains are yellowish). and the leaves are curling down on the new leaves that are yellow. the veary bottom leaves are completely yellow and dieing

sounds like some kinda nute def. do ur leaves look like any of the pic here?

Could it be the heat?

it kinda look like a iron deficiency. but from my understanding the veins stay green while the leaves stay yellow.so i thought sulfur deficiency so i pu a tbl spoon of epsom salt in a gallon of water.then i checked the ph of the soil and it was like 6, some are a little lower. the ph of the water was 7. is the soil lower cz of the epsom salt and do u think that was a bad idea? oww i dnt knw about the heat its been between 93 and 98 and alot of humidity

i forgot to say that my veins are not staying green thats why i dnt think its a iron deficiency

you need pictures. when was the last time you transplanted them?read up on what calmag-plus does.its hard to tell you without pictures because it could be rootbound could have a bug could have a disease its too hard to diagnose without seeing it.

I've heard a lot of people say that following FF nutrient chart will burn the fuck out of your plants.

they have been in the same containers but to day im putting them in bigger containers and i went to every other day on the watering. i think either it a iron or sulfur deficiency.... yes ff will burn but if u take a tsp less than what it said, except the open sesame, beastie bloom, and cha ching u do it to the feeding schedule