Theyou use for plants is important. You can’t just go out and dig up a bucket full of garden soil for repotting. It will probably contain weeds, perhaps some pests and be much too heavy for use in a pot.
In the 1930s researchers at the John Innes Institute in Britain developed a loam-based compost that would, with some variations, suit most plants. It has become the basis of modern soil comports. This is its composition.
- 7 parts sterilized loam 3 parts granulated peat
- 3 parts grit/coarse washed sand
- 2 parts hoof and horn 1 part potassium sulphate
- 2 parts super phosphate
The loam should be sterilized, good quality turf,preferably well-rotted. It should also be slightly greasy.
Compost Fertilizer Powdered
- base chalk
- J.I. No 1 ismadebyadding 0.05 tonne 113 gr 21 gr (lcwt) (4oz) (3A oz)
- J.I. No2 ismadebyadding 0.05 tonne 227 gr 43 gr
- (lcwt) (8 02) Uioz)
- J.I. No3 ismadebyadding 0.05 tonne 340 gr 64 gr
- (lcwt) (12 oz) (21 oz)
This was developed in the 1950s. It is normally com-posed entirely of peat or 10 parts of peat to 1 part coarse sand. The fertilizer additions are very similar to the J.I. Base. The principal advantage of peat-based compost is that it is sterile and holds water longer than loam-based compost without becoming stale or stagnant. Being of a more open texture, it allows theto grow more quickly. But note that; its fertilizers are soon exhausted and it cannot support large plants. Also, do not firm down peat-based compost.