. 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. WATERING WATERMELON 19G7 the sunshine is very bright is often followed by scald- ing of the foliage unless the plants are well shaded. Ferns, Rex begonias, Chinese primroses and richardias are among plants easily injured in this way. Consider the temperature. The temperature at which the plants are kept, the po
. 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. WATERING WATERMELON 19G7 the sunshine is very bright is often followed by scald- ing of the foliage unless the plants are well shaded. Ferns, Rex begonias, Chinese primroses and richardias are among plants easily injured in this way. Consider the temperature. The temperature at which the plants are kept, the position of the heating pipes, the amount of light, and the freedom of ventilation per- missible, need to be kept in mind in watering plants in glasshouses. It is better, as a rule, to have the water- ing conform to these conditions; but frequently the prac- tice must be reversed. Experiments by the writer show, beyond question, that the temperature of water used in watering plants exerts a marked effect upoa the growth, flowering and fruiting of plants. It is now held that, in general, the water should be of a temperature close to that of the air in the house where the plants are growing, or about 10° F. below. Watering may be indirect. Shading the glass of greenhouses in summer with some suitable material is much practiced by florists for the purpose of sheltering plants fi'om too great intensity of light, and for the purpose of reducing evaporation and transpiration. Certain kinds of plants, as palms, and some kinds of ferns, require this; also newly potted plants. Syring- ing of walks, by reducing the temperature and increas- ing the humidity of the air, also tends to reduce trans- piration and save watering. Watchfulness and atten- tion to ventilation are necessary, however, to avoid excessive humidity, which tends toward a soft watery growth and extreme sensitiveness and susceptibility to disease. Vessels to contain plants should always be provided with openings at the bot
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