Cauliflower seed is mostly grown in Europe, chiefly in Holland and Germany, to some extent in Italy and France, and less in England. One variety, the Large Asiatic, seeds abundantly in Northern India. There are a few localities where the seed is successfully grown in the United States.
In Europe the dwarf early varieties are chiefly grown in the north, and the large late varieties at the south. In the south the seed is most easily grown, and southern seed brings the lowest price.
McIntosh states that cauliflower seed seldom ripens in Scotland. In England, as I have said, it is grown to a limited extent, but not so much as that of broccoli. The seed plants are there selected in June, at the time of heading, and allowed to stand until the seed matures. Mr. Dean states that his Early Snowball produces in warm, early seasons better seed in England than anywhere else. Loudon, in his "Encyclopædia of Gardening" (5th Ed., 1827) quotes Neill, as saying that "Until the time of the French Revolution, quantities of English cauliflower were regularly sent to Holland and the low countries, and even France depended on us for cauliflower seed. Even now English seed is preferred to any other."
A later English writer states that the English prefer Dutch seed and the Dutch English seed.
Most of the seed now used in England, as well as nearly all of that sold in this country comes from Holland, France and Germany. The climate, especially of Holland and North Germany, is particularly favorable for the production of fine strains of seed, especially of the dwarf early varieties.
McIntosh ("Book of the Garden," 1855, Vol. II, p. 116) says: "Our best cauliflower seed is imported from Holland, and for its quality we have much greater reason to thank the better climate than the growers, who are not over particular in the matter, as Dutch cauliflower seed is sure to sell."
The Mediterranean varieties are generally large, and require for the most part too long a season to be popular and successful in this country. As dwarf varieties have been produced, the cultivation of this vegetable in Europe has extended farther north. As already stated, when the cauliflower was first cultivated in France the island of Cyprus was the only place where it was known to seed, and for a time the plant was known in England under the name of Cyprus Colewort.
Although most of the seed used in the United States is still imported, American grown seed appears to give good satisfaction and is moderate in price. Professor W. J. Green, of the Ohio experiment station, who tested Puget Sound seed in 1889, reported as follows: "The most remarkable examples [of the superiority of Northern grown seed] are found in the Puget Sound cabbage and cauliflower seed, which show great vitality and consequent vigor in growth of plant. We have received numerous samples grown in that region by H. A. March and A. G. Tillinghast, brother of Isaac Tillinghast, the seedsman. These seeds were very large, full of vitality, and the plants uncommonly vigorous. At transplanting time the plants were nearly twice the height of others of the same variety, while the difference in color was very marked. This robust habit continued to manifest itself during a greater part of the season, but as maturity approached, the variation was less and less marked, until at last the others had caught up, and there was no perceptible difference." No change in time of maturity or habit of growth was noticed.
Mr. Brill, of Long Island, states that to secure seed there it is best to winter over the partially headed plants in a cold frame or cellar, and set them out early in the spring. The summers are so warm there, however, that except in particularly favorable seasons but little seed forms. Several excellent early varieties have originated on Long Island, and there is reason to believe that hot, changeable climates, though unprofitable for the growing of seed, are particularly favorable for the production and maintenance of early sorts able to head in hot weather.