I have some advice.
Contrary to popular belief I feel you would be better off using Plant Tone it is 5-3-3.
You need more nitrogen than you do the others as the plant uses more of it.
This is my first year using it and it has done wonders.
The other is a question.
Are you sure it isn't a flow problem and not pressure with your water.
And are you on a well?
I would be happy to help you with this.
Put a gauge on your faucet and see what the pressure is with the water turned off.
This is called static pressure.
Worth