Thanks for stopping in Orange and d-7:ciao:
d-7 I answered your question in the BHC but will give a more detailed answer here.
They turned purple on their own.
I had 3 types of the Pink Mamas'. 3 plants were indica leaning with 2 getting real purple. The other indica looking one turned a bit purple but the bud to leaf ratio was much better in this one.
1 plant is sativa looking with no purple and also has a pretty good bud to leaf ratio.
These were all grown in 5 gallon smart pots. With a ss of 2 years old that I just keep amending between usage. Fed with my own teas made up of bat guanos,kelp,wc, and molasses. On a side note, when amending my soil for this grow I forgot the epsom salt. Did have a bit of a problem with the 1 gal smart pots with a deficiency in mg that also showed in the 5 gallons. There was time between the 1 and 5 long enough for me to realize what I did and start feeding heavy dosages of cal/mg to the 5's to help correct the problem before it got out of hand.