it depend's how big you want them to finish up,if you want them to be say 3ft veg them for a month or until there about 6-7 nodes high and remember sativa's strech twice as much than indica strain,s which will strech about a quarter to a third it's own height when you switch the light's to 12/12.
marijuanamat Reviewed by marijuanamat on . Mmm there doing quite well! Light cycle... Q's When again is a good time to switch to 12/12? These suckers are going to be bushy, there really healthy, probably 5" tall now, lots of nicely colored leaves. Still on 18/6..... Rating: 5