purple branches

Hi! I'm having problems with these plants (different genetics, same problem), and I don't know what to do anymore, I hope to get some help from someone better than me. My plants are showing something I think is a severe phosphorus deficiency with purple branches: 2 months ago I bought a cheap...

Hello again guys this is my 2nd post within 2 days so things aren't going as swimmingly is I hoped it would go for my first grow haha. Apart from Extremely slow growth, slightly upwards cupped leaves and purple branches. , yesterday afternoon i accidentally dropped my hat on the plant like the...