If you don’t have a growlog please answer these questions.
What strain are you growing? Is it Auto, Fem or Reg? Reg
Are you growing Indoor or outdoor? Outdoor
Are you using nutrients? Which ones? How much? Just using water
Both of my plants are doing the same thing I’ve been watering them every 3 day what should I do?
I wouldn’t worry about the bottom leaves to much they usually do die off first. I would worry when the new growth is showing signs of bad health but looks pretty healthy to me. Does look like nute burn more than a deficiency tho so maybe if you have been giving them nutes use regular water for the next week or so n see if it helps
what are the conditions like? are those upper leaves tacoing? could be heat stress if so, i am going through a severe case of it right now.
if you aren’t giving too many nutes and your watering is on point then atmospheric conditions need checking. eg if too hot or too much sun, heat stress.
i had mine sat on hot tiles which was burning the root zone, took me ages to figure it out too which made things worse.
but i also agree with the above, if you arent using an enriched soil (ie with nutes) then its time to start feeding, could be she’s just hungry.