winter onions and new shallot sprouts

I regularly pay a visit for my winter onions. The yellow ones (shenzui) are good and red ones are very thin and doesnt want to grow at all. I am trying a variety of shallot (vegetable store bought) which is from south india to make a sambar. I put them in a seed tray two in a hole and filled with compost and let it in the cooler bedroom. They have longer stalks than the winter one planted outside in october last year. Is this sounds acceptable??? should i feed anything to the outside onions now?