Put my girls into flower 2 weeks ago and notice that the plant on the left side has a couple of leaves on the bottom third of the plant that look like this. Everywhere else looks pretty good. any ideas? Old vegetation? copper deficiency? Potassium?
Without having much information about the plant, my guess is potassium deficiency. If you can provide more info about the plant then we can determine if it's actually something different. More info on potassium deficiency: https://www.mrgrowit.com/post/potassium-deficiency-in-cannabis-plants What to include in your post: https://www.mrgrowit.com/forum/grow-community/read-me-first
More info plz. Ph and ppm runoff, feeding schedule any and everything you can think of