I have finalized my vegging soil after playing with my soil and testing its pH and TDS ppms.

A 5 gallon bucket is made up of:
2 parts Pro-Mix
1 part Vermiculite
2.5 cups pelleted lime
1 cup North Country Pro Gro (5-3-4) pellety/rocky fertilizer supplement
1/4 cup worm castings

Resulted in a pH near 6.9, and a TDS reading of 330 ppms. That will be a good starting fertilizer concentration, and seeing as how the pH is so low in the sourrounding area I want the pH to be as close to neutral as possible.

I'm going out to prepare the site tomorrow, digging holes and clearing weeds, along with laying down soil and lime.

Any suggestions for how the holes should be set up besides 3x3x3?