Archive image from page 251 of Cyclopedia of American horticulture, comprising. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches cyclopediaofam02bail Year: 1900 736 HERBS The propagation of plants by division is simply the separation of u larger clump of roots and crowns into smaller plants. In the case of plants having Imds on the roots, this division may be carried fur
Archive image from page 251 of Cyclopedia of American horticulture, comprising. Cyclopedia of American horticulture, comprising suggestions for cultivation of horticultural plants, descriptions of the species of fruits, vegetables, flowers, and ornamental plants sold in the United States and Canada, together with geographical and biographical sketches cyclopediaofam02bail Year: 1900 736 HERBS The propagation of plants by division is simply the separation of u larger clump of roots and crowns into smaller plants. In the case of plants having Imds on the roots, this division may be carried further, and small pieces of the root used to grow other plants. The separation of plants as practiced in the garden is not usually so much for the purpose of increase as to avoid over-crowding of roots and crowns, with loss of vigor to the plant; for instance, a plant of iris having been undisturbed for a number of years, becomes a tangled circular mat of rootstocks, which in the center cannot find room to grow, and so the plant appears as a large clump of roots, throwing up foliage only on the outer ring. The period during which a plant may remain in any one place without needing separation will vary with the vigor of growth of the plant in each posi- tion ; for instance, a group of plantain lily in a favorable situation will need separation every two years, while in a poorer place it might remain four. However, the average length of time for a few typical species may be given thus ; Bell is perennis, pompon chrysanthemums, and other strong-spreading, shallow-rooted and easily established plants do best with yearly separation; Phlox maculata and mouarda every two years ; helianthus, asters and many of the compositiB and Phlox decussata about every three years; C'onvallaria majalis and many spring-flowering bulbs every four years; while such plants as peonies may be left for a longer period. In general, better flowers are obtained from a plant with but one crown than when two or
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