This section is from the book "Commercial Gardening Vol2", by John Weathers (the Editor). Also available from Amazon: Commercial Gardening, A Practical & Scientific Treatise For Market Gardeners.
Some few years ago Bouvardias were grown in very large numbers for market, some growers disposing of as many as 20,000 to 30,000 plants annually. Owing to competition from other plants, however, Bouvardia culture is now more restricted. The white-flowered kinds, like the old Mexican jas-miniflora (fig. 268), candidissima, Humboldti, and Vreelandi amongst the singles, and Alfred Neuner amongst the doubles, are particularly useful for floral work, and often find their way into wreaths, bouquets, crosses, &c; while the scarlets, like Dazzler, Hogarth, Scarlet Prince, and Vulcan, and President Cleveland, crimson - all single-flowered - are also sold as cut in quantity as well as on the plants. Perhaps the best double scarlet is Hogarth flore pleno.
Bouvardias are grown as greenhouse plants, but are quite hardy enough for bedding out during the summer months in the milder parts of the country. Unsold plants or those kept for stock are planted out by market growers. In early autumn they are lifted carefully and potted up for the production of blossom during the winter season. Stock is increased from cuttings of the young shoots developed from old cut-down plants in the same way as Fuchsias. They are generally started in February, being inserted in pots filled with sandy soil and placed in a close frame. The cuttings root in a few weeks, and are then potted up singly in 3-in. pots in good sandy loam and leaf mould. The temperature at night is about 60° F., rising 5 or 10 degrees by day. The young plants are encouraged to grow quickly in the genial warmth, and are moistened overhead with the syringe in the afternoon when the ventilators are closed for the night. When large enough the plants are either transferred to 5-in. or 6-in. pots, or they may be planted out in June in nicely prepared soil in the open air. The tips of the shoots are pinched out at intervals after the first potting, to induce a good bushy habit, as this does away with the necessity of staking and tying the plants. During active growth the plants require plenty of moisture at the root, and a nice sprinkling overhead daily is also beneficial. They also like plenty of air and sunshine to ripen the growths and thus prepare them for bearing masses of bloom. Besides the varieties mentioned above, others are: intermedia, pink; Laura, rose; Mrs. Green, salmon; rosea multifiora, rose pink; The Bride, blush white - all single; and President Garfield, pink, and Schmidti, flesh pink - doubles.
Fig. 268. - Bouvardia jasminifiora.