The previous owner of my plot left a huge 25kg bag of fertiliser in the shed. It's got no information on it about what it's good for, apart from the breakdown of it's components. Can anyone let me know how best I should use it please?:
Compound fertiliser no 8.
9-4-10
Nitrogen 9%
Phosphorus 4%
Potassium oxide 10%
Magnesium oxide 5%
Sulphur trioxide 25%
Thanks.