rooftop gardening
Acer (Maple)—Very vigorous plants, suitable when young for pots, and afterwards for the shrubbery The A Negundo Variegata has silvery variegated leaves, which contrast effectively with dark foliage, Campestre Colchicum Rubrum, with its bright crimson palmate leaves, is very ornamental, as is also Negundo Californicum Aurem, with its golden-yellow foliage The Maple grows best in a sandy loam It may be increased by cuttings planted in a shaded situation, or by layers, but the choice varieties are best raised from seed sown as soon as it is ripe.
Pinks—Will live in almost any soil, but if large blooms are required rich earth is essential They are increased by pipings taken in May or June These should be planted out in October, but must be given a well-drained position, as too much wet is injurious to them Do not set the roots too deep, but let the collar of the plant be on a level with the soil.
rooftop gardening
Lithospermum Prostratum—A hardy perennial, evergreen trailer, needing no special culture, and adapting itself to any soil It is increased by cuttings of the previous year's growth, placed in peat and silver sand, shaded and kept cool, but not too wet They should be struck early in summer, so as to be well rooted before winter sets in Its blue flowers are produced in June Height, 1 ft.
Allium Descendens—A hardy, bulbous perennial Plant in October or November in any garden soil, and the flowers will be borne in July Height, 1 ft.
Bahia Lanata—A hardy herbaceous plant of easy culture from seed sown in spring or autumn in any garden soil It produces bright orange flowers from June to August Height, 1 ft.
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