its hard to give advice without a specific question......
make the most of ur lights with white paint or reflective mylar sheeting
make sure ur plants dont get any light (its surprisingly hard to make a room or closet light proof) during the dark period of 12/12
try and circulate the air as much as possible in grow area
dont let the grow area get too hot
some strains like more water than others...the easiest way to tell, i find, is by the weight of the pots u have the plants in ,,,, u kinda get a feel for it ...
dont over water!!
use as big as pots as possible for the grow area... they dont have to be huuuuuuge or anything... but, the bigger the pots you have then you dont have to water as often..
clones will never be as healthy as plants from seeds...keep them small and flower early to make the most of them...
find a local grow shop(this mightnt be all that easy where you are but theres loads in ireland...) they will have all the nutrients n fertiliser you need...
there are loads of internet growshops that will very happily ship you whatever you need!!
BioBizz
you will need to feed your plants... i use biobizz products and i think they work fine.. but then again.. i have nothing to compare them to.. it works like this- first week or so, give em root juice to get the roots growing pronto... while in veg phase give em biogrow... when you start flowering 12/12 give em biogrow and biobloom, and eventually top max to make the most out of your buds
follow the feeding scheme that comes with fertilisers... giving them too much feed can kill them...
when the plants are ready they will have 60-70% red hairs and the plant will look like its coming end of life.. its natural for some of the plants leaves to start withering and dieing as the plant matures.... just at the end though... its not a good sign any other time...
if yuo have any more question in specific ill try and answer... im no expert but ive grown a crop or 2 in my wardrobe and its fine out.