. Ornamental cacti : their culture and decorative value . Bui. 262, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate DISEASES. 15 them. Pruning may be done at any time, but preferably when theatmosphere is dry, so that the cut surface may dry and heal conservatories during the colder season, in order that the airmay be sufficiently dry, a temperature ranging from 60° to 70° be maintained. A temperature lower than 60° for any con-siderable length of time would hold the moisture about the plants toolong and invite decay. During the warmer season, if the plants
. Ornamental cacti : their culture and decorative value . Bui. 262, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate DISEASES. 15 them. Pruning may be done at any time, but preferably when theatmosphere is dry, so that the cut surface may dry and heal conservatories during the colder season, in order that the airmay be sufficiently dry, a temperature ranging from 60° to 70° be maintained. A temperature lower than 60° for any con-siderable length of time would hold the moisture about the plants toolong and invite decay. During the warmer season, if the plants arekept in the house it is necessary that it be kept fully aim is to have at all times a dry atmosphere and a moderatelymoist well-drained soil. If the plants are placed in open ground duringthe summer months and their pots plunged in the beds, these bedslikewise must be thoroughly drained. In placing a collection out ofdoors as a permanent planting, a situation should be selected, ifpossible, where the ground slopes sufficiently to insure perfect drain-age. If natural drainage is impossible, a system of dra
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