22nd Annual Connecticut Agricultural Experiment Station Report for1898, p. 268 (1899)

By W. E. Britton

In October, 1897, a small section of bench space in the forcing house having an area of 14.5 square feet was equally divided by a partition and one-half filled with compost, the other with a mixture of coal ashes and peat moss. To the latter were added 15 grams of nitrogen in nitrate of soda, 6 grams of phosphoric acid in dissolved bone black, and 30 grams of potash in muriate. For 100 square feet of bench space these applications would be 2 lbs. 12 oz. of nitrate, 1 lb. 1 oz. of dissolved bone black, and 1 lb. 15 oz. of muriate. Fifty grams of carbonate of lime were added to each plot. In the center of each plot was set a Duchesse de Brabant rose which had been growing for two years, and in the corners four other plants of the same variety of a year's growth.

The plants in the coal ashes at first dropped their leaves more than those in the compost, but soon put out new ones and began to bloom. The plants in both plots blossomed continually all winter and were exceedingly thrifty with perfect foliage, free from mildew. The plants set in coal ashes and peat gave larger blooms, but rather lighter in color than those from the compost plot. There was no difference as regards fragrance and form. The first blossom was picked December 4th, and the last one June 2d, when the plants were removed from the benches. The fertilizers added as well as the yields obtained is given in the following table:

  Plot 207A Plot 207B
Soil Compost Coal Ashes
and Peat Moss
Fertilizers (Grams) —    
     Nitrate of soda 0 94.8
     Equivalent nitrogen .. 15
     Dissolved boneblack 0 35.34
     Equivalent phosphoric acid .. 6
     Muriate of potash 0 64.5
     Equivalent of potash .. 30
Yield —    
     Total number of blooms 42 58
     Average diameter of blooms, inches 2.2 2.28
     Average length of stem, inches 4 4.8
     Average weight of blooms, grams 5 6