Northernlights Question

peanut0862

New Member
I've got 3 NL plants growing. They are 6 weeks old and been topped once. Right now they are about 14 inches tall and I was wondering when i decide to switch to 12/12 about how much taller they will get. I'm not to restricked on room hight (6 ft) but I want to get the most smoke I can and don't want to switch to soon. Thanks for the help
 
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