White Rhino is a heavy Indica strain which given the right enviroment, i.e coldness, will like many other Indica dominant strains turn hues of purple, blue and in extreme cases black. Do you have temp readout in your room or do you monitor them? If the plant has not been looked after then that will more than likely contibute in some way but abuse/deficiencey of plants will usually lead to yellowing/burning/wilting/drooping etc not black leaves. I may be wrong but it seems to me that your plant has been exposed to colder days/nights than it should have been or a mixture of both, hope this helps.
Basically im growing Whitre rhino from nirvana. and im growing with a friend at his house. basically he killed the plant without asking me and whatevr but ohwell. it was weak and over stretched and fllopped over anyway but he said the leaves turned black on the top and were green on the bottom but wouldnt rub off. Any ideas what could have caused this? i had 3 plants going and the other 2 are okay. no possible wayt it was light burn. Does anyone know what causes symptoms of anysort of black matter that stays ontop of leaves? if so would really appreciate it + rep.
