When should I introduce nutes for these autoflowers?

This is my first time with dwc...

These are 7 days old from seed and I just put them in my dwc setup.

When should I start introducing nutes and what ratio of veg to flower nutes?

They are Nirvana Short Rider...

you are at the perfect time to start. start with about 200 ppm and work from there.

ok great thanks!

What about lighting? I have a dual ballast mh or hps, and 2 85w cfl's?

Should I put them under mh or hps right now?

Figured mh until they start to flower then hit them with hps... am i right?

20-4?

correct. good job. start the mh a little high and work it down a little each day and make sure temps stay good.

Sounds good, i'll have to start a journal, and compare the 4 dwc to the 1 soil (which i grew with before). Thanks again!