So I'm about to mix up my first batch of Subcools supersoil recipe. In one of his youtube videos he says that he and others he has worked with have used Biobizz Allmix in place of Roots Organics, but with amendments of coco coir, oyster shells and kelp meal. Being in the UK - our available organic products are different to the US so I have tried to switch out things as best I can and was wanting some opinions on the recipe I now have.
This is the Subcool recipe I got online:
1 large bags of a high-quality organic potting soil with coco fiber and mycorrhizae (i.e., your base soil)
3.125 to 6.25 lbs of organic worm castings
.625 lbs or 5/8 lbs or 10 ounces Fish Bone Meal 3-16-0
.625 lbs or 5/8 lbs or 10 ounces Bat guano 0-5-0
.625 lbs or 5/8 lbs or 10 ounces Blood meal 12-0-0
3/32 cup or 1.5 tablespoons Epsom Salts
1/16 cup or 1 tablespoon sweet lime (dolomite)
1/16 cup or 1 tablespoon azomite (trace elements)
3/4 teaspoon powdered humid acid
With added coco coir, oystershells and kelp meal if using Biobizz Allmix.
Now this is my recipe:
1 Large bag of Biobizz Allmix
4lbs worm castings
10oz Bone Meal 3.5-17-0
10oz Bat Guano 1-10-1
10oz Hoof and Horn 13-0-0
1.5 tbs e.salts
1.5 tbs lime
1 tablespoon Volcanic Rock Dust
Coco coir
Seaweed Meal
Eggshells
I was wondering if the things I've swapped out will be good? How much cococoir do I add to the mix? I have extra perlite. I don't have Fish Bone Meal, just bone meal (same NPK). I swapped out Blood Meal for Hoof and Horn. No Azomite so I've got Volcanic Rock Dust (is this the same thing?) I can't find Oyster shells but have plenty of home made ground eggshells I use for my worm farm are they the same thing (slow release calcium)? How much would I need?
And Kelp meal, I can buy that but I already have Seaweed Meal are these the same things?
I also have Mycorrhizae to add in too. I don't have humic acid but he says it doesn't really need it.
I'm probably overthinking it but just wanted some advice and didn't really know where to post the questions so made my own thread.
Any advice greatly appreciated, I'm currently using Allmix which I threw in a bunch of amendments but it's not been easy to work with, I'm trying to simplify things.
Cheers,
D.

This is the Subcool recipe I got online:
1 large bags of a high-quality organic potting soil with coco fiber and mycorrhizae (i.e., your base soil)
3.125 to 6.25 lbs of organic worm castings
.625 lbs or 5/8 lbs or 10 ounces Fish Bone Meal 3-16-0
.625 lbs or 5/8 lbs or 10 ounces Bat guano 0-5-0
.625 lbs or 5/8 lbs or 10 ounces Blood meal 12-0-0
3/32 cup or 1.5 tablespoons Epsom Salts
1/16 cup or 1 tablespoon sweet lime (dolomite)
1/16 cup or 1 tablespoon azomite (trace elements)
3/4 teaspoon powdered humid acid
With added coco coir, oystershells and kelp meal if using Biobizz Allmix.
Now this is my recipe:
1 Large bag of Biobizz Allmix
4lbs worm castings
10oz Bone Meal 3.5-17-0
10oz Bat Guano 1-10-1
10oz Hoof and Horn 13-0-0
1.5 tbs e.salts
1.5 tbs lime
1 tablespoon Volcanic Rock Dust
Coco coir
Seaweed Meal
Eggshells
I was wondering if the things I've swapped out will be good? How much cococoir do I add to the mix? I have extra perlite. I don't have Fish Bone Meal, just bone meal (same NPK). I swapped out Blood Meal for Hoof and Horn. No Azomite so I've got Volcanic Rock Dust (is this the same thing?) I can't find Oyster shells but have plenty of home made ground eggshells I use for my worm farm are they the same thing (slow release calcium)? How much would I need?
And Kelp meal, I can buy that but I already have Seaweed Meal are these the same things?
I also have Mycorrhizae to add in too. I don't have humic acid but he says it doesn't really need it.
I'm probably overthinking it but just wanted some advice and didn't really know where to post the questions so made my own thread.
Any advice greatly appreciated, I'm currently using Allmix which I threw in a bunch of amendments but it's not been easy to work with, I'm trying to simplify things.
Cheers,
D.
