High gorp! I'm from your neck of the woods as well, QC, and have gone thru some of the same issues as you have described. Although, instead of getting into it with Customs and Border Services, I just called Aurora Innovations (Roots Organics manufacturer) and Import Canada and after about 3 or 4 phone calls realized it would be more trouble than it's worth to attempt getting Roots soil across the border. You sir are a ballsy dude...
So, to answer your question, I used BioBizz as Sub has suggested, as well as a Canadian product, out of BC, called Sea Soil. It's slightly higher in Nitrogen so I adjust the Blood meal accordingly. I use Sea Soil Container Mix and Potting Mix with Coconut Coir, in equal amounts. Make sure it's the Coco Container and Potting versions, NOT the usual mixes with peat or the original (orange bag) recipe. That's the base soil to use here in Canada. Then follow everything else as SubCool has outlined.
Azomite can be found for a nominal cost at wheatgrasskits.ca
Humic/Fulvic are easily obtained via Ebay.
And Sea Soil can be obtained through reputable gardening centres and hydro shops that deal with the distributor Greenstar. Without a doubt, it took some effort, but it was alllll worth it.
I'd also like to take this opportunity to answer a question that has come up (again). Water your plants in SuperSoil just before they wilt. When you go to water the plants, wet the soil initially with a small amount of water, let it distribute itself over the course of about 30 mins or so and THEN return to completely saturate and finish watering your garden. This will ensure a better hydration and more even uptake. Don't worry so much about the run-off (unless you're interested in testing it), but rather focus on the weight of your pots when completely dry and completely hydrated. This is an important aspect of container gardening, that Sub has already indicated, and it helps the grower learn the intricacies of their garden's water requirements.
I've also noticed something interesting about pot sizes and lighting intensity. If you are not using 1000-watter like Sub does, then the game changes. 7-10 gallon pots with a 1/3 to 2/3 of super soil is the general guideline for 4 plants under a 1000 watts in a 4x4 footprint. If you are using lower wattages, or cramming in more plants, or growing in a larger areas, then modifications have to be made.
Basically, we all have slightly different growing conditions and the SubCool Super Soil method has been refined for Sub's environmental factors. Use his words as framework, change as little as possible, but when slight alterations are introduced, just take the time to make some observations and determine what tweaks are needed to ensure Super Soil success.
You can thank Chernobyl for the rant.
Love ya guys, hope y'all are growing good!
Stay up-
- Andy