Show plant growth and sunlight recent experiments show that the amount of light that a plant tins lins ef affects its growth fully ns as much as climate the iris for example which ordinarily blooms in may or june would not bloom under hothouse con in winter until its period of dally daily light was artificially lengthened by six hours the october chrysanthemum was made to bloom in midsummer by shortening the dally light period lettuce by the same means was held in the rosette stage for a long time and the radish with only seven hours of daylight grew for more than a year before it shot up its newer flower stem stein and died youths companion |