phosphorous deficiency

Hello again everyone!! I’ve been trying to compare this look to those in my weed bible and have my thoughts on phosphorus due to the “blotchy” look.. possibly even iron because I see dark marks but I also have no idea. What do you guys think? Only 2 out of 5 look like this and have all been...

Phosphorous deficiency symptoms include; red stems and slow, stunted, or deformed growth but also include darker green lower leaves as well as leaves that may yellow then die. Adding a organic fertilizer containing Phosphorous can fix this problem.