Do I need to nutes and when????

i grow outside an took 3 cuttings which are doing well but now the winters setting in and they spend most days sittin on my windowsill an at night they sit in the hall under a cfl ,not enough light reaches for decent growth but it seems to keep them perky, they are only being watered whenever i feel they need it but haven`t added any nutes as yet an was wondering when i should do so or if i need to . plants are`nt pot bound so must be survivin on the nutes in the soil just a bit scared in case they up an die ....any suggestions would be greatly appreciated...

you should feed after the first 3-4 weeks of growing always read the manufacturers instructions as nutrient burn can also kill you lovely plant

oops.. these are a couple of months old now i put them in bigger pots about 3 weeks ago one of them was a bud thats mutated to a small monster and the other two are 2 feet tall ,ones gettin trimmed down but the other one is a picture of health was hopin to somehow slow down the growth in the hope that they survive the winter but keep them healthy(don`t want much I know lol) but you reckon i should still be usin nutes? ok cheers