outdoor flushing, nutes, compost...help

okay, i am about to start my first outdoor grow. i understand that if it does not rain every 10 or so days(?) to go out and water them.
do you add nutes when you water?
and if it rains frequently enough to where i dont have to water my plant for a while, will the plant have sufficient nutrients till i water it again? i plan on using a small amount of compost/manure/coffee grounds/mulch, etc. and i am wondering if that would be enough to hold it over til i nute it again.
i plan on mixing the compost, grounds, and mulch under 2 inches of soil, and mixing manure with the very top layer of soil. is this correct?
finally, how often, if at all, should i flush my plants, and should i wait til it has been dry for a couple days?

thank you guys, this has been a long post with a lot of questions, hopefully your answers will help me harvest a bountiful yield.

you can add nutes when you water, every other watering is much healthier unless your plant is accustomed. If your soil is a good mix of nutes, you should be fine letting the rain do it's thing. The best way to tell if a plant needs anything is to simply ask it... I can look at my babies and know exactly what they need, but that comes with time and experience.

if you're not using chem nutes, and organic soil only, no flushing needed. but if you're putting shit in there for your plant to take up, flush for about 2/2.5 weeks before harvest for a smoother smoke.

thanks man, keep in touch, its always handy to get an opinion from someone in the same region as me