So wat happened to this leaf?

I clipped it off because it was hanging and the stem had turned brown, but the spots on the leaf was there for a couple days before... just need to know so i can make sure it doesnt happen to the rest of the plant

no biggie dude...my first grow i had alot of leaves like that, and it was excess N just flush it real quick, and you should notice a difference. they feel crispy and dry too right?

are you giving it the right amount of nutrients? you don't want to over feed them.. and how far away are you keeping the lights from your plant?

I think it might be becuse of over feeding, how do i flush, all 3 plants are in pots and soil, im pretty sure the lights didnt do it and yes they feel crispy and dry while all the new growth fan leaves look fine
and my other plant is llooking really good right nice and perky an green but the very very tip of its leaves are a slight yellow and look like they have died, but its only the very very tip

the leaf looks like not enough light