John Innes Compost

John Innes is 7 parts loam, 3 parts peat and 2 parts sharp sand.
No. 1 is 4ounces J I base fertilizer 3/4 of an ounce chalk or lime to 1 bushell.
No. 2 is 8 ounces base, 1 and a half ounces of chalk.
No. 3 is 12 ounces base, 2 and a quarter ounces of chalk.
If I were you I would add 4 ounces Hoof/Horn or bone meal to each bag of no. 2.
If you have some OLD mortar rubble or plaster add 1 4inch pot to each bag.
Hope these details will be of some help in the future as well.