Cookin' up those pies!

Growth has been extremely slow and not handling the cold temps too well at all by the looks of the leaf shape, yet still growing to a decent size overall, but Since fixing the temps slightly and topping on 23/1 the new growth nodes seem to really be kicking off, I will let them all grow out a bit more then LST the main stem to level them. They also seem to be showing a deficiency which is worrying in such an early stage, so I have upped there feed slightly and added a bit of bloom early to get some taste in the soil, but I guess the temps wasn't helping with the intake, but any tips would be greatly appreciated.