Should I feed my plants every time I water?

If not what cycle should I use?

Every other watering.

Thanks man!

what about a soilless mix or coco which contains no nutes, I heard yes and I also heard no, any input?

I've also heard they use all the nutes from the FFOF during the first couple of weeks. Confusion!

This quesiton is kinda like asking how long is a piece of string. You feed your plants when they need food not on a timed schedule. Some plants will use more or less nutes, as they get larger they will use more nutes, when they are in flower they will use different amount of nutes and even within flowering they use different amounts of nutes depending on what stage they are in (ie strech tends to use a good amount of N/etc). Once every other or every 2 waterings is a decent starting point (or you could feed at 1/2 - 1/4 strenght every watering) but to do it well you need to learn to read the plant.

In vegetative I use 1/4 dose of dyna grow 'grow' or alaska fish fertilizer , a couple tablespoons for 2 gallons or 1 tablespoon of dyna grow for the seedlings or clones up to a foot or 2 tall. that works 2 0r 3 times a week with flushing in between. I have been using hydroton mixed with fancy potting soil to help with drainage, now mixing some cactus mix with new plantings. the coco retains moisture on the other hand, but with more drainage, maybe I can get faster growth or ripening.
They say you can give a quarter dose every watering , but the dyna grow might be too strong for seedlings.
when they are 2 feet tall or nice big plants you could give a full dose of organic fertilizer once a week, even 2 or 3 times a week outdoors if the plant is benefitting from it, foxfarm big bloom and tiger bloom seem to be very good

I dont do it every time but most of the time I do lol

what about 'lucas formula' in hydro? that's daily timed, feed. will it burn them?