. The American florist : a weekly journal for the trade. Floriculture; Florists. 822 Fhe American Florist. May 13^ sometimes occur within a few hours. A crop of My Maryland roses was ma- turing at the New Jersey experiment station greenhouses during the week of January 15-21. Previous to January 13 the color had been high, but from January 13 to 1(3 the days were dark, cloudy and foggy and the roses cut upon the morning of January 16 were very light in color. Bright weather conditions occurred upon January 16, and upon January 17 the opening rose-buds were again of a deep pink color. Here was
. The American florist : a weekly journal for the trade. Floriculture; Florists. 822 Fhe American Florist. May 13^ sometimes occur within a few hours. A crop of My Maryland roses was ma- turing at the New Jersey experiment station greenhouses during the week of January 15-21. Previous to January 13 the color had been high, but from January 13 to 1(3 the days were dark, cloudy and foggy and the roses cut upon the morning of January 16 were very light in color. Bright weather conditions occurred upon January 16, and upon January 17 the opening rose-buds were again of a deep pink color. Here was an instance of a de- cided improvement in color within twenty-four hours. This might lead one to believe that light was the real determining factor in the color of roses. However, crops of light-colored Killarney and My Maryland are not infrequently seen in greenhouses dur- ing clear days where the plants are ex- posed to all the light possible. It Is therefore evident that other factors may exert an infliieoce. A constant night temperature of from .58° to 60° is regarded as most favorable for Killarney and from GO" to 62° for My Maryland. During the day a temperature of from 70° to 75° is favorable for both varieties. When a greenhouse containing My Maryland is kept at a temperature above 64° at night the growth of the plants is more rapid, but the stems become slender and are likely to be softer and weaker. If the house is kept at this temperature after the buds commence to set, the stem between the bud and the first leaf below it becomes elongated and the bud itself is much smaller than desirable. If a liberal supply of plant food and moisture is maintained in connection with the ac- cess of heat the flowers have a tend- ency to become light in color. Yet My Maryland roses which have made a soft, rapid growth because of high temperatures and liberal quantities of moisture and plant food may produce tiowers of high color even after the buds have set, if the houses
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfloriculture, bookyea
