Originally posted by burnie
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To be honest, I was trying to square the circle with difference between Bone Meal and Fish Bone Blood. 12% Active ingredient to 15% in FBB.
Looking at standard 1.5kg packets @ £3.99
Bone Meal NPK 3 9 0 12% Active ingredient
Fish Bone Blood. NPK 3 9 3 15% Active ingredient
Sulphate of Ammonia NPK 21 0 0
Sulphate of Potash NPK 0 0 48
Superphosphate NPK 0 17.5 0
So mixed 3 last - 1 pkt each would give NPK 7 6 16 - 29% Active ingredients
at 1 box to 2.4m x 10m (10 boxes for my 10 x 20m area ish) - it then starts to make sense to mix / customising the fertilizer for specific treatments, with fast acting Sulphate of Ammonia for leaf growth through to potash for fruit development.
Technically speaking - Targeted treatment should give saving of 50%+ should easily be possible. But then I found a supplier for a big bag of FBB so needs more work
** Addition
May have jumped the gun. The 3 individual components may not be organic. I was on the thread they were all packaged similar where listed, so was an easy leap.
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