For plants that have the "Purple Gene" the easiest way to turn them is to ice their roots after you flush them... (I.E. about a week or 2 before harvest)...

The cold is what triggers most outside plants to turn purple.

Also, to learn Tissue Culture, I would start with edible mushrooms. It's a very easy way to get some of the science down, but maybe not the details. (My bet is that the solution for plants is different than the solution used to grow mushrooms (mycelium)
ZionsLion Reviewed by ZionsLion on . Using Potassium permanganate? I have heard if you apply potassium permanganate into the water you used to feed your cannabis plants that it will increase the purple content of your buds. Is this true? If so does it effect the plant at all other then color? On another note i was wondering if anyone could answer these questions for me. Best soil to use? Best first time grow strain? (I am not stupid, i would like to grow something i can truly be proud of) Nutrients? What should i use to increase health and growth? Rating: 5