Super soil scale down ratio help

Discussion in 'Organics' started by Mr.J420, Dec 28, 2013.


    Mr.J420 Well-Known Member

    Hey guys, so I'm setting up my first batch of super soil in a couple years, I feel i never got it quite right so I never wrote down any ratios. I've looked over subcool's famous formula and am basing mine on that and whats available around me. However Subcool never said how big the bags of soil are just that there are 8 of them so I am not confident I have enough of everything going into the soil, or maybe too much:-? Here is what i am going for and let me know what you think!

    55L (15gal) Pro Mix base soil w/ Mycorrhiza. I haven't used this before, only cheap soils so i am pretty excited to see what these fungi can do!:mrgreen:
    5L (1.3gal) Worm Castings
    2L (8.5 cups) 1.5-1-1 shrimp compost (leftover)
    1L (4.6 cups) vermiculite
    550ml (2.3 cups) 12-0-0 blood meal
    550ml (2.3 cups) 0-9-0 bat guano (leftover, PH 4.8 may only have 1 cup left)
    550ml (2.3 cups) 0-12-0 bone meal (still need to buy)
    250ml (1 cup) Dolomite lime
    I also have some kelp meal which is great for trace elements but cant decide if i should put some in or only water with it, the package recommends water with it or foil air.
    Thanks! J

    st0wandgrow Well-Known Member

    I've never made subs soil, but I do make my own soil which is somewhat similar .....

    Your compost/vermicompost should make up 25%-33% of your base mix. You need to add more worm castings or other form of compost to that mix imo. If you do add more, you should also consider bumping up your aeration material too. Pumice, rice hulls, lava rocke, perlite, etc.

    A good base mix would be 50% sphagum peat (Pro-Mix), 25% worm castings, 25% aeration material

    Mr.J420 Well-Known Member

    Thanks, St0w. I'll bump up the worm castings to 14L. The promix has some perlite but I can add more too.

    Trousers Well-Known Member

    I use something very similar to Super Soil. I am pretty sure Sub is talking about a regular sized bag of (Roots Organics) soil.
    I mix a 1/4 batch that is very similar to this:

    I left my notes to the side.

    1/4 Recipe
    2 large bags of a high-quality organic potting soil with coco fiber and mycorrhizae (base soil, roots organic)
    6.25 to 12.5 lbs of organic worm castings (go with 15 pounds add more croutons?)
    1.25lbs or 20 ounces steamed bone meal
    1.25lbs or 20 ounces bloom bat guano (0-5-0) (find replacement for this)
    1.25lbs or 20 ounces blood meal
    3/4 lbs or 12 ounces 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) (Lets go with 4 tablespoons)
    1.5 teaspoons powdered humic acid

    1 ¾ cups mycorrhizae
    1 cup Greensand
    3.5 tablespoons alfalfa meal
    1 cup crab shell meal
    22 cups coco croutons

    I will add some more shredded coco next time and up some of the nutes/lime. I have really low humidity, so the croutons act as aeration and water retention. I want to jam as much compost/ewc in there as possible, without it getting muddy.

    I have a batch that is 30 days old today. Any leftover tea goes into the super soil.
    My last Ocean Forest mix had gnats and was not strong enough. I use that stuff for seedlings and clones.

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