Nutrient\Water Help!!

Hello fellow blades.....I'm in need of some help ...I'm a total noobie when it comes to nutrients...I'm growing one plant in a 3 gallon bucket ....I bought the trio of fox farm nutes ...grow big ...bloom ...and tiger blooom....I have the soil feeding schedule but I am confused as to how much nutrient\water to give my plant ...I know it says the correct amount to add like tsp\tblspoon per gallon .... seeing as I have a 3 gallon grow bucket and it calls for each nutrient be mixed per gallon ... can the nutrients be mixed together in just one gallon of water or do they all have to be seperate gallons?? Would I be over feeding since I only have a 3 gallon bucket and some weeks call for 3 or more gallons of water\nutrient solution??....could someone tell me a good feeding schedule with proper amounts of water....and nutrient\ water solution for each week from veg to flower...with fox farm trio of nutes listed above! ?

you can get their feed schedule off their website. it looks a little hot to me, i would prob start @ 1/2 and see how it goes. mixing them in the same water shouldn't be a problem. not all 3 at once tho obviously.