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Rhododendron arboreum Cultivation | Propagation | General Uses Cultivation Notes: Succeeds in most humus rich lime free soils except those of a dry arid nature or heavy or clayey[1]. Prefers a peaty or well-drained sandy loam[1]. Succeeds in sun or shade, the warmer the climate the more shade a plant requires[200]. Requires a pH between 4.5 and 5.5[200]. Hardy to between -10 and -15°c, the pink flowered form is hardier than the red[184]. Succeeds in a woodland though, because of its surface-rooting habit[200], it does not compete well with surface-rooting trees[1]. Plants need to be kept well weeded, they dislike other plants growing over or into their root system, in particular they grow badly with ground cover plants, herbaceous plants and heathers[200]. There are many named varieties selected for their ornamental value[200]. Plants form a root ball and are very tolerant of being transplanted, even when quite large, so long as the root ball is kept intact[200]. This plant is the national flower of Nepal[51]. A very ornamental plant[1], it is not very hardy outdoors in much of Britain, but grows well in the milder areas of the country[1]. Plants in this genus are notably susceptible to honey fungus[200]. For further Rhododendron arboreum gardening information |
