John Innes Compost
Encyclopedia
John Innes Compost is a set of four formulae for growing medium, developed at the John Innes Centre
in the 1930s and released into the public domain
. The formulae contain loam
, peat
, sand or grit, and fertiliser in varying ratios for specific purposes.
The composts are "soil-based".
John Innes Centre
The John Innes Centre located in Norwich, Norfolk, England is an independent centre for research and training in plant and microbial science...
in the 1930s and released into the public domain
Public domain
Works are in the public domain if the intellectual property rights have expired, if the intellectual property rights are forfeited, or if they are not covered by intellectual property rights at all...
. The formulae contain loam
Loam
Loam is soil composed of sand, silt, and clay in relatively even concentration . Loam soils generally contain more nutrients and humus than sandy soils, have better infiltration and drainage than silty soils, and are easier to till than clay soils...
, peat
Peat
Peat is an accumulation of partially decayed vegetation matter or histosol. Peat forms in wetland bogs, moors, muskegs, pocosins, mires, and peat swamp forests. Peat is harvested as an important source of fuel in certain parts of the world...
, sand or grit, and fertiliser in varying ratios for specific purposes.
The composts are "soil-based".
| Grade | purpose |
|---|---|
| Sowing | Sowing of seeds and rooting cuttings |
| No. 1 | Sowing of large seeds and pricking out |
| No. 2 | Potting up and potting on |
| No. 3 | Final potting |