feedun seeds

hello im growin from seeds now and there about 2 to 3 weeks old now i just wanted to no shall i start to feed them or just carry on with water ????

you can prob do 1/4-1/2 strength nutes

they have about 2 to 3 sets of leaves but there startin to look a bit yellow

yea a little bit of nitrogen should clear that up

this will sound silly but can i get that from a hydropinic shop??

yes you can get veg and flowering nutes plus additives from a hydro shop.the veg nutes will have all the nitrogen your plants need.