The growth seemed to slow down a bit midweek. Turns out it was because I lowered the light which made them bushier instead of stretching. I raised it up to about 50cm above top of pot and switched to 20/4 and they have started stretching again, and looking very healthy, I think the 4 hours darkness is beneficial too, but at this stage its still guesswork.
Gave them their first feed of nutrients today (25th November - AG at 19 days old GG at 17). They got 4mls each of the Advanced Nutrients Grow and Micro mixed through 1 litre of water - added another 500mls of PH 6 balanced water on top of this so all up 1.5 litres, still no run off to the pot so they are thirsty girls. I also added a splash of worm wiz which I've used on my previous grow. Excited to see how they go after the first feed.
Ive started LST, at this stage folding and bending the leaves and rotating the pot to try and get even light to all parts, I've got myself some garden wire and will begin experimenting with tying some of the established fan leaves down, enjoying this grow :)
Vasily,