auto flowering: what to feed?

O.K i was wondering what to feed my auto flower short rider. Can i feed it just water? what should i mix with the water how often? i haven't planted yet i just want to be prepared. I im a first time grower and there is no hydro shops where i live. Please try to put a link to the products you mention.

some autos wont even need a veg nutrients, just bloom. but besides the veg period its just about the same as a photo minus the fact you dont have to switch light hours from 24/0 20/0 18/6 to 12/12. as for nutrients go i cannot recomend anything because i have only been growing for 4 grows, as far as nutrients i used on my autos go i used the Technaflora line up. the start pack. its like 50 bucks and you get pretty much their whole line up just in like sample bottles.

can i just give it straight water?