To my old soil (about 25 gallons) I am going to mix one bag of the promix mentioned above if they have it when I go tomorrow, perlite/vermiculite(there is none in my current mix) maybe pumice? blood meal (or seed meal if they have it) fish bone meal or bone meal, kelp meal, mycorrhizal, neem seed meal and maybe a few other things. Don't forget home grown ewc. And greensand.
Looks like your on track to a good soil mix. I would HIGHLY
recommend pumice over perlite and vermiculite. It has to do with the CEC of the soil.
CEC, as reported by nearly all soil testing laboratories, is a calculated value that is an estimate of the soils ability to attract, retain, and exchange cation elements.
Cation elements are the Macro/Micro nutrients that a plant will absorb (negative and positively charged). Also, Pumice has the ability to hold water and gives a place for the smallest bacteria to hide from predators.
Personally I have some experience with Sunshine Mix #4 and I will say this stuff is awesome. My friend uses it in his synthetic grow and this stuff is retarded buffered. Always a ph between 6.3-6.8.
Sunshine Mix #4:
Formulated with Canadian Sphagnum peat moss, coarse perlite, starter nutrient charge (with Gypsum), dolomitic limestone and our long-lasting wetting agent.
Canadian Sphagnum Peat Moss (65-75%/vol.)
Dolomitic & Calcitic Limestone
Endomycorrhize (Mycorise™ Pro)
Extra Perlite horticultural coarse grade
These soil mixes are pretty much the same minus a few amendments here an there. Either of these mixes will work out awesome once you add your amendments. If you opt for the promix I would suggest adding 25% of your EWC or compost ( i use this
and I love it) and 20% or so of an aerator. Good luck and keep on growing.
Edited by wongsuxx, 25 December 2010 - 11:00 PM.