These are receptacles in which plants are grown, and are usually made of earthenware, although treated paper, compressed peat and plastic materials are also used. Paper and peatare usually discarded when planting out — see SOIL BLOCKS for details of peat .
Earthenware pots are all finished with ahole or holes, although crocks are often added to prevent composts going sour. (Crocks are simply pieces of broken flower pots.) The pots are made in graded sizes, indicated by their inside diameter. The smallest are called ‘thumbs’, and are 2 in. across, the sizes increasing therefrom as follows. -pans follow the same dimensions and casts. Seakale pots are in two sizes — 16 by 16 in. and 13 by 12 in. Rhubarb pots are 16 by 24 in. deep.