Posted: 22/04/2013 at 18:07
Jphn Innes is a set of formulations - sterilised loam, sand, peat, lime, fertilizers, first developed in the John Innes Research Institute in the 1930's. It is not a brand. Different manufacturers make John Innes formulations. Some make multipurpose compost 'with added John Innes' - but it might be 5% or 10% John innes - they don't tell you , so don't be taken in.
John Innes Seed - does what it says
John Innes No1 - for pricking out - potting on
John Innes No 2, for hosue plants, window boxes, hanging baskets etc
John Innes No 3 - for shrubs that are going to be in pots for the duration - Japanese maples, dwarf magnolias etc. - contains longer lasting fertilizers
John Innes Ericacious - for rhododendrons, camellias etc. that prefer acid soil.