This section is from the book "The Florists' Manual", by William Scott. Also available from Amazon: The Florist's Manual.
A large genus of herbaceous or shrubby plants. A few of them are native, hardy plants, but not of any value to the florist, although some years ago, in the absence of better flowers, some of the species were largely grown to supply white material for designs, etc.
The species riparium is the most valuable for the florist, but the quality and value of its flowers are not sufficient to pay for the trouble and the space under glass.
After flowering in March cut back the stems and from the young growths make cuttings, which root most easily. After frost is gone plant out eighteen inches apart. Pinch the shoots as they grow during summer. They grow freely in any soil. In early October or before frost appears lift with a ball of earth and plant on the bench in five inches of soil.
As before stated. the panicles of pure white flowers would be useful if we did not have other flowers of more beauty. It has not the beauty or finish of the bouvardia, and occupies the benches for too long a time to be profitable.