Outdoor ph necessary?

Oh and C-Ray is a legend too.

Uh, I've never even used pH testing... It depends a bit on your soil, some soil buffers better than others, but generally, soil buffers well. What's more important is knowing what kind of soil you're dealing with. Considering it's commercial soil, it *should* be balanced well enough, but I dunno how nutrient dense it is (personally I've found commercial soil to often be kinda bland, depleting relatively quickly though certainly not within one grow). Like I actually use the soil (if you can call it that) in my yard and amend it as I deem necessary, so far with excellent results. Hey btw, I posted a bunch of Twisted Insane songs on GD recently... www.youtube.com/watch

No you don’t as long as you build a nice microbiology they act as your buffer and maintain the root zone ph around 7.