Aaron, to be certain that the soil is organic, you need to start building your own. I find very stressful that our local source of top soil accepts all sorts of green debris, which is all grounded up and composted in large piles. This is how it goes: Not everyone is a compost freak like me and I am sick and tired of seeing daily the discare (if that is even a word). I clean an office and a couple of buildings for a living. I clean their garbage areas. I am constantly removing glass bottles and other garbage bags from the 'green compost' bins. Also, the restaurants have green bins for a local private soil company. (Cedergrove), Behind the Starbucks and other restaurants collects the food waste and the truck comes and dumps in and move on... well, all the homeless and uneducated composters use this for garbage. I once asked the Starbucks manager if I could have a bag of used grounds, he told me about their bin behind and told me to helpmyself. So I opened and what I see? bottle, empty soda pop cans and other city waste that was not compost at all. All this mixed waste is grounded and sold as 'good soil'. Our city sprays the trees, so the city waste is also a waste, not organic. Hum, solution is to start composting, have a red worm minifarm.
I feel my plants are almost organic, I do use the wood chips from the neighbour's trees and hedges, when I see them pruning them. I recycle all my kitchen and plant waste and use the chop and drop method when I do my pruning, I cut small and let it drop where it needs to be. It seems to all be used up. The mulching becames soil as it becomes home for the earthworms. I have my chickens which are fed what is "organic sold in the store", which many not be fully organic. (that is why I way almost!!!) So far, it is working. My plants are healthy.
I don't believe in perlite and what it takes to mine the light rock. the danger to the earth and those who work with it.
http://www.epa.gov/ttnchie1/ap42/ch11/final/c11s30.pdf
I lived my more than half century of life without it, and will not need it now. I purchased a bag when I first wanted to root the cuttings, but found my results to be the same with or without it, so I will not advocate for the use of it. That is my own experience. I am not sure what it would be for a larger scale.