The John Innes Horticultural Institute was founded in 1904, 'for the improvement of horticulture by experiment and research'. It was set up with money bequeathed by a London businessman of Scottish descent.
John Innes composts were developed as an attempt to standardise compost formulae at a time when nurserymen were bringing a confusion of formulae to the market.
The range includes John Innes seed compost, for seed sowing or rooting cuttings; John Innes potting compost No.1 for initial potting; John Innes potting compost No.2 for potting on; and John Innes compost No.3 for final potting of stock plants.
Composts like this, which are soil based, should be stored in dry conditions and used within a month of purchase.