Chempak organic onion fertiliser is a specially formulated granular fertiliser with essential nutrients, in the correct balance, slowly released throughout the season to give tastier & increased yields of quality onions, shallots & garlic. 1kg is sufficient for planting 75 onion sets in a 7.5m &40;25ft&41; row. &40;N:P:K &45; 6&45;5&45;7+4 Mg O&41;