A little help with some yellowing leaves?

They've had this problem their whole lives but, it looks like on some it's getting a little worse. I think I might be giving them too much plant food but, maybe somone with more experience could help me out.





They are indoor plants, [obviously] with about 4 liters of water with miracle grow mixed in a week. Vegetative state around 3-4 feet tall depending on the plant, and they are all planted in a blend of potting soil.

I had leaves like that my first grow. Easy to over water in MG, I know, cause its all ive grown in. If you think you're feeding to much cut back, but I dont see nute burn. Careful not to over water, let them babies dry out really good. I've done much better since cutting back on water. I also tend to have magnesium issues so that might be worth checking out.

Thanks for the advice mate, I'll give em some time to flush out and dry out and come back with results.