. The Book of gardening; a handbook of horticulture. Gardening; Floriculture. 734 THE BOOK OF GARDENING. young shoots in spring in the warm pit; pot on, keep growing, and give plenty of water; these should flower the same season. Cut back a little after flowering so as to obtain bushy plants, and ripen in the open. Keep cool during the winter and place in the warm pit in early spring to start. Flowers in June and July. Soil: loam, leaf- soil, and rotten manure. Feed with liquid manure whilst growing. N. Oleander has red flowers, and its variety, N. O. alburn^ white. Both do well and make hands
. The Book of gardening; a handbook of horticulture. Gardening; Floriculture. 734 THE BOOK OF GARDENING. young shoots in spring in the warm pit; pot on, keep growing, and give plenty of water; these should flower the same season. Cut back a little after flowering so as to obtain bushy plants, and ripen in the open. Keep cool during the winter and place in the warm pit in early spring to start. Flowers in June and July. Soil: loam, leaf- soil, and rotten manure. Feed with liquid manure whilst growing. N. Oleander has red flowers, and its variety, N. O. alburn^ white. Both do well and make handsome plants planted out. Height 4ft. to 5ft. Oleander.—See Nerium. Periwinkles. — See Vincas. POLYGALA OPPOSITIFOLIA and varieties make good pot-plants. Propagate by cuttings of the side-shoots in summer, in a cool pit or frame, and grow in peat, loam, and sand. Cut back a little after flowering, grow on, and ripen in a cool frame. Flowers purple, borne in early summer. Rhododendrons play a very important part in fur- nishing the greenhouse during late winter and early spring. There are two sections, (i) those coming from the Himalayas, China, and Japan ; and (2) those coming from the Malay Archi- pelago, Java, and Borneo. (i) The Himalayan Section all form large shrubs, and in some cases trees. They may be grown in large pots or tubs, but are best planted out in peat and sand. Give plenty of water, and syringe well when growing. Propagate either by layers in spring or by cuttings of young shoots in early summer, just as they are beginning to get firm at the base, and insert almost entirely in sand in the cool pit. Grow cool. Sorts : R. arboreuni (Fig. 482), R. barbatnni^ R. Gibso?iii, R. Dalhoiesice, R^ Manglesii, R. fiiveu7?i, R. grande, R. Aiicklandii, R. Jesteria?mni^ R. ciliatuin^ and R. keivense. These all bear large flowers in big trusses, some- what resembling the hardy varieties of R. ponticum^ as also in their habit. See illustration of R. arboreum (Fig. 482).. Fig
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