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They grow best in somewhat moist but well-drained, sandy loam and in a partly shaded position, sheltered against dry winds. C. Lawsoniana and C. obtusa like more dry, the others more moist situations, and C. thyoides grows well even in swamps. Propagated by seeds sown in spring; increased also by cuttings from mature wood in fall, inserted in a sandy soil and kept in a coolframe or greenhouse during the winter; if in early spring gentle bottom heat can be given, it will hasten the development of roots considerably. All the so-called retinosporas and the dwarfer forms, and most of the varieties of C. Lawsoniana, are readily increased in this way, while the other forms of C. noolkatensis, C. obtusa and C. thyoides do not grow well from cuttings; therefore for most varieties veneergrafting on seedling stock during the winter in greenhouse is preferred, but dwarf forms always should be grown from cuttings, as they often lose their dwarf habit if grafted. The so-called retinosporas of the gardens, with linear, spreading leaves, are juvenile forms, which have retained the foliage of the seedling state. There are similar forms in Thuja. For their distinguishing characters, see Retinospora. For the numerous gardens forms, see Beissner, Handb. der Nadelholzk., 2d ed., pp. 528-574, quoted below as Beissner.

They grow best in somewhat moist but well-drained, sandy loam and in a partly shaded position, sheltered against dry winds. C. Lawsoniana and C. obtusa like more dry, the others more moist situations, and C. thyoides grows well even in swamps. Propagated by seeds sown in spring; increased also by cuttings from mature wood in fall, inserted in a sandy soil and kept in a coolframe or greenhouse during the winter; if in early spring gentle bottom heat can be given, it will hasten the development of roots considerably. All the so-called retinosporas and the dwarfer forms, and most of the varieties of C. Lawsoniana, are readily increased in this way, while the other forms of C. noolkatensis, C. obtusa and C. thyoides do not grow well from cuttings; therefore for most varieties veneergrafting on seedling stock during the winter in greenhouse is preferred, but dwarf forms always should be grown from cuttings, as they often lose their dwarf habit if grafted. The so-called retinosporas of the gardens, with linear, spreading leaves, are juvenile forms, which have retained the foliage of the seedling state. There are similar forms in Thuja. For their distinguishing characters, see Retinospora. For the numerous gardens forms, see Beissner, Handb. der Nadelholzk., 2d ed., pp. 528-574, quoted below as Beissner.

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