confused

hey my plant stem started to change colors is that suposed to happen or is it in bad condition. the stem is green but now has redish brown streeks on it
 
They will do that.
Dnt over anayze your plants. If they are green and growing then they are cool.
 
Brown is never good. Could be ph or nutes, temp, stress etc. More then likely a strain dependent thing. Could be the natural color of the plant...but brown..never good. Stalks should usually stay pretty green.
 
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