Yes they do so far all I have discovers is the nute burn but I don't have a ph test lol I need to get one but as for now I'm doing ok without it so I'm just gonna wait untill after this grow because I gotta pack it up to get ready to move but when I move I'm going to run again after I findout how noisy the landlord is I been trying to get them looking better but I'm trying not to meds with them 2 much I have learned a lot tho on this grow and am thinking this flower is going to teach me also