I have some questions about outdoor growing

[Billymgb]

This is my first time growing and my first question is about these nutrients, I am growing mine in the ground not in pots so during veg I only used miracle grow for gardens and only 3 times and it was the type your garden hose attaches to the container and you water it in. so about 4 weeks ago they started flowering and I picked up some Flower fuel. I have used the flower fuel about 4 times so what other nutrients should I be using to get the big fat colas. Another question is the flower fuel says to use it when feeding now does that mean every time I water which is every night and about 1/2 to gal each remember they are in the ground. I am not using the fuel every time I water but that is why I am asking.