Here is the FoxFarms Feeding Schedule for Soil... Hydro is MUCH more complex, unless you use bubblers, then you can follow a Phasic feeding schedule (At end of weekly schedule!)
This is a tested and proven schedule by professional growers but you can adjust amounts to suit your strain or style. Just make the changes gradually if you want to increase the suggested amounts so you dont overdose or harm the plant.
All this info is courtesy of Lady Zandra at Planetskunk.com
FOX FARMS FEEDING SCHEDULES
WEEKLY FEEDING- per Gallon
Sprouting and week 1--BigBloom 2TBS
week 2-- 2tsp Grow Big + 2TBS Big Bloom
Week 3--3tsp Grow Big + 2TBS Big Bloom
Week 4--JUST 3 tspGrow Big + 1/4 tsp Open Sesame
Week 5 same as week 4 unless going 12/12--
Week 5- OR--day 1 of 12/12-- 2 tsp Tiger Bloom +1TBS Big Bloom + 1/2 tsp Open Sesame
Week 6--same as above
Week 7-- 2 Tsp Grow Big + 2 tsp Tiger Bloom +1TBS Big Bloom + 1/4 tsp Beastie Bloom
Week 8-- 2Tsp Grow Big + 2 tsp Tiger Bloom +1TBS Big Bloom + 1/2 tsp Beastie Bloom
Week 9-- 2 tsp Tiger Bloom +1TBS Big Bloom + 1/4 tsp Cha Ching
week 10-- Same as above
Week 11--2 tsp Tiger Bloom +1TBS Big Bloom + 1/2 tsp Cha Ching
At beginning of week 11--Check Trichomes-- Flush if ready.. otherwise, continue as with week 11 every week until you flush!
Also recommended--but not a necessity--
Bush Doctor Sledgehammer (prevents lock-out)
use 2 drops per gallon of water between feedings starting in week 4 of 12/12