Ok, well you couldnt have read anything if your going to do what you just said.

The plant DOES NOT need ferts YET. Give it atleast 3 weeks before you even THINK of ferts.

You have to water when the top 3 inch or so of soil is dry.

Ffs, go do some reading man, if you had then you wouldnt have had to ask these questions...

These are BASICS.

And each seed needs it own pot, not 3 in one pot, cos the roots will get tangled and then they will end up dieing.