Definitely go with subcool's recipe. The first time I made it I followed his instructions to a T, using everything he said at the proper ratios. What I got from it is what turned me onto organics so much, the man is a genius for sure!
After that harvest, I was low on funds due to car repairs and was unable to afford the necessary ingredients. Not only that, I didn't let it sit for the required 30 days (although I did feed with tea, but still). My yield suffered drastically and it was because I didn't know as much about organics as I thought I did. All of the ingredients are necessary because they are what will be creating your soil web. In an organic grow, you water the soil web and not the plants itself. The soil web is what will be providing your nutrients to your plants, without this soil web you have no nutrients and just water. As a result your yield suffers badly. This is why you must take great care to get rid of chlorine/chloramine before watering your supersoil, otherwise you will be killing your supersoil rendering it useless. When this happens, you can brew a guano tea to get a soil web going again. The problem is it will be a new soil web created from your tea, not the supersoil.
So, tl;dr. Make sure you let your water sit out for 24 hours, or purify it so you aren't killing your supersoil. Make sure you let it sit for no less than 30 days or you risk burning your plants. Be sure to have extra supersoil on hand also, just in case your girls eat everything in the soil you'll have some to topdress for them to have more to eat!
If I can also make a recommendation, go with 7 gallons if you can afford the veg time. Supersoil and other amended soils are for larger containers, in containers smaller than 7 gallons the plant tends to use up all the nutes in the soil before it's done. If you still want to use 5 gallon pots, you could just topdress but I'd recommend going with the 7 gallon if possible. I used the full recipe,
Full Recipe
8 large bags of a high-quality
organic potting
soil with coco fiber and mycorrhizae (i.e., your base
soil)
25 to 50 lbs of
organic worm castings
5 lbs steamed bone meal
5 lbs bloom bat guano
5 lbs blood meal
3 lbs rock phosphate
¾ cup
Epson salts
½ cup sweet lime (dolomite)
½ cup azomite (trace elements)
2 tablespoons powdered humic acid
I used 4 bags of roots organic and 2 coco blocks which yielded 11 cuft of soil, or 82 gallons. For 4 7 gallon pots, you'll only need 3.5 gallons of SS per pot so you would only need 14 gallons of supersoil. Might I recommend the 1/4th recipe.
1/4 Recipe
2 large bags of a high-quality
organic potting
soil with coco fiber and mycorrhizae (i.e., your base
soil)
6.25 to 12.5 lbs of organic worm castings
1.25lbs or 20 ounces steamed bone meal
1.25lbs or 20 ounces bloom bat guano
1.25lbs or 20 ounces blood meal
3/4 lbs rock phosphate
3/16 cup or 3 tablespoons Epsom Salts
1/8 cup or 2 tablespoons sweet lime (dolomite)
1/8 cup or 2 tablespoons azomite (trace elements)
1.5 teaspoons powdered humic acid
This will yield you roughly 30 gallons of supersoil. This may sound like overkill, but it will leave with enough to top dress your girls if they need it. This topdress will be great because it will be sitting for much longer and be that much better! If it isn't all used, then you can save it for your next harvest! Welcome to organics!