. 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. Gardening. VIOLET taken not to injure the routs of the plants. During the summer the temperature should be kept as low as pos- sible and in the winter as nearly as possible at 45° to 50° F. at night and 50° to 60° in the daytime. The ventila- tion of the houses should receive careful attention at all times, so that an abu
. 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. Gardening. VIOLET taken not to injure the routs of the plants. During the summer the temperature should be kept as low as pos- sible and in the winter as nearly as possible at 45° to 50° F. at night and 50° to 60° in the daytime. The ventila- tion of the houses should receive careful attention at all times, so that an abundance of fresh air can be sup- plied to the plants when needed. Watering is a diflicult problem, usually taxing to the utmost the best judg- ment of the grower. No fixed rules can be laid down as to the proper amount to apply or when to apply it, this depending upon a number of factors, such as the character of the soil, temperature and moisture of the atmosphere, amount of light, etc. As a rule, however, the soil should be kept moist at all times, and the wa- tering should be thorough, but never to such au extent as to cause the soil to remain saturated for any consid- erable length of time. \'io/>.'f Houses (171(1 Frames (Fig. 2692). —There is probalily little choice between any of the standard styles of greenhouses, provided certain features are observed in their construction. Provision should be made for supplying an abundance of fresh air, either from the sides or top, whenever it is needed, the venti- lators ijeing so arranged as to be easily operated either from within the house or from the outside, the inside arrangement to be used in general ventilation of the houses, the outside whenever fumigation with hydro- cyanic acid gas is necessary. The arrangement and location of the house should be such as to secure the maximum amount of sunshine during December and January, and the minimum amount during the growing season, when it is necessary to maintain as low a
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