Opinions on the pics u can c

Hi fellow weed lovers. As you can see by the pics, my plants are about 5 weeks old now and are only on a window sill in the bedroom in south east london. What do people think? are they too small, just right, scrawny etc. I have so far just fed them 1 day old tap water not even ph tested. I am due to get some miracle grow tomato feed tomorrow. And some miracle grow booster stuff when it flowers. Anyone give advice on the quantity of tomato feed i need to give them?

Thanks for reading and for the advice