How to make your own John Innes compost
Guide
No. 1: Use for 3 – 3.5 inch pots
No. 2: Use for 5 – 6 inch pots
No. 3: Use for pots above these sizes
| No. 1 |
| Mix:7 parts sterilised loam 3 parts peat 2 parts sharp sand Then add:0.6gms per litre ground limestone (0.6kg per cubic metre) 3gms per litre John Innes Base fertiliser (3kg per cubic metre) |
| No. 2 |
| Mix:7 parts sterilised loam 3 parts peat 2 parts sharp sand Then add:1.2gms per litre ground limestone (1.2kg per cubic metre) 6gms per litre John Innes Base fertiliser (6kg per cubic metre) |
| No. 3 |
| Mix:7 parts sterilised loam 3 parts peat 2 parts sharp sand Then add:1.8gms per litre ground limestone (1.8kg per cubic metre) 9gms per litre John Innes Base fertiliser (9kg per cubic metre) |
| If you can't get hold of John Innes Base fertiliser, make your own using: |
| 3rd hoof & horn 3rd superphosphate 3rd sulphate of potash |
| Seed Compost |
| 2 parts sterilised loam 1 part peat 1 part sharp sand 0.6gms per ltr ground limestone 1.2gms per ltr superphosphate |
| Cuttings Compost |
| 1 part sterilised loam 2 parts peat 1 part sharp sand Add no fertiliser |
| Ericaceous Compost |
| Mix:7 parts sterilised loam 3 parts peat 2 parts sharp sand Then add:3gms per litre John Innes Base fertiliser (3kg per cubic metre) |
(1,000 ltrs = a cubic metre)
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