Japonica, I to 12 ft., better known as Hoteia japonica or Spiraea japonica, thrives in peaty or sandy soil; its glossy tripinnate leaves, and feathery panicles of white flowers early in summer, are very attractive.
They are increased by cuttings, and grown in a cool greenhouse in rough peaty soil, with a slight addition of loam and sand.
Bog Xerophytes live in the peaty soil of fens and moors which are physically wet, but which are said to be physiologically dry.
Vegetable soils or moulds, or humus soils, contain a considerable percentage (more than 5) of humus, and embrace both the rich productive garden moulds and those known as peaty soils.
It appears that with soils which are not rich in humus or not deficient in lime, calcium cyanamide is almost as good, nitrogen for nitrogen, as ammonium sulphate or sodium nitrate; but it is of doubtful value with peaty soils or soils containing little lime, nor is it usefully available as a top-dressing or for storing.
Mixed peaty and loamy soil, deep and cool.
Pyrenaica, 3 to 6 in., is a pretty dwarf plant, requiring a warm position on the rockwork and a moist, peaty soil more or less gritty; it has rosettes of ovate spreading root-leaves, and large purple, yellow-centred, rotate flowers, solitary, or two to three together, on naked stalks.
P. 865), the agents of the transformation of cellulose into peaty substances are saprophytic fungi and bacterial ferments.
In depth; on poor loamy clay, and even on peaty moors.
Many soils of a light sandy or gravelly or peaty nature and liable to drought and looseness of texture can be improved by the addition of large amounts of clay of an ordinary character.