Temps can increase purple tendencies but the strain has to be ABLE to do it anyway.
PurpleMaxx from humbolt nutes also does that.
Or just grow a purple strain....
Food coloring? No.
stinkyattic Reviewed by stinkyattic on . TURNING A PLANT PURPLE? HI I WANT TO KNOW HOW TO TURN MY PLANT PURPLE, I HEARD COLDNESS WILL HELP?:smokin: SO I INSTALLED AN A/C WHAT TEMP SHOULD IT BE SET AT, AND DOES FOOD COLORING WORK TO? Rating: 5