They're under a 400w sunmaster dual spectrum hid, and have been since day 2. Im growing in 'canna terra pro' soil which has nutrients already in it, so I relied on them for the first two weeks. Now they've started flowering ive started using 'Biobizz Bio-Bloom'.
And thanks for the kind words. It's my first grow and I keep swaying from highly proud and happy to insecure and paranoid lol. Just trying to let them get on with it for the most part, but would like to get to the bottom of the purple stem issue. Ive read that ak-47's always seem to have purple stems, but ive also read of people ignoring purple stems and suddenly finding their plants dying :-s