RED stem?

I am about 8 weeks into flower on my first grow...for the last couple weeks I have noticed that the main stem about 1/2 way up the plant is red and green...I don't think this is normal, any ideas? Thanks!

is it more red red, or kinda purple?

if its purple stems can be caused by the temperature dropping to low.

HashGordon said:

if its purple stems can be caused by the temperature dropping to low.

Click to expand...

That makes sense because my grow box is down stairs in an unfinished basement and can get down to about 60 degrees when lights go out at night.

HashGordon said:

if its purple stems can be caused by the temperature dropping to low.

Click to expand...

its normal
Its only bad on the underside of the leafs, Then you got your self a phosphorous deficiency. Well your 8 weeks do you have nice size buds? IF not then you dont have a problem.
Phosphorus is locked out if you have a lack or an excess of zinc/iron. Or your growing medium is below 5.8 or above 7