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what do you guys think about this organic potting soil?

BurnOne

No damn given.
ICMag Donor
Veteran
Make your own...

LC’s Soiless Mix #1:
5 parts Canadian Spaghnam Peat or Coir or Pro-Moss
3 parts perlite
2 parts wormcastings or mushroom compost or home made compost
Powdered dolomite lime @ 2 tablespoons per gallon or 1 cup per cubic foot of the soiless mix.
...Check the link in my sig line below for cheap earthworm castings. Free shipping to the eastern USA.

Or, if you use Pro Mix or Sunshine Mix...
LC's Soiless Mix #2:
6 parts Pro Mix BX or HP / Sunshine Mix (any flavor from #1 up)
2 parts perlite
2 parts earthworm castings
Powdered dolomite lime @ 2 tablespoons per gallon or 1 cup per cubic foot of the soiless mix.
If you use a 3 qt. saucepan as “parts” in the amounts given above, it equals about 1 cu. ft. of soiless mix and you can just dump in a cup of powdered dolomite lime.

...either of these mixes is as good or better than anything you can buy. Mostly BETTER!

Burn1
 

3BM

Member
I just have to say, that is way too much lime. Most compost and casting sold commercially are already pH adjusted to near neutral. ProMix also contains lime. I would suggest letting your mix sit for at least 2 weeks, and then testing the pH before adding any lime. Liming according to those description will get you a soil well over 7, when in fact cannabis prefers a soil somewhere between 6.2 and 6.5 Lime is really only necessary when pH falls below these ranges, and it wont get there unless you consistently add acidifying ingredients. Even if you replaced all the peat/coir/Sunshine Mix with Black Peat (which is substantially more acidic then standard peat) you still probably wouldnt need lime in those proportions. At most add a handful to 30 gals, but always test the soil before adding lime. Sorry to digress from the subject but I have seen lots of problems caused by over liming as of late.
 
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