You're friends are right. The plant will let you know when it's done with a leaf.
grey1223 Reviewed by grey1223 on . Still having unknown plant problemsa Hi guys, Iv just started flowering my 4-5 week old plants to find a female for cloneing for smoking (not sure yet) and iv noticed that my bottom leaves were turning a rusty/bronze/brown on the tips and working its way up the leaves. Also a few little patches appearing in the middle of some lower leaves. Now the thing is i was using a bad ph tester and i was under the impression it was around 7 and when i tested it today with a digital tester it was 3.8. So iv drained the resevoir and Rating: 5