Propagation and Culture.—All the sorts are propagated by seeds; which should be sown where the plants are to remain, as they do not generally succeed well when transplanted. Sowings for early use may be made the last of April, or beginning of May; but as the bulbs are seldom produced in perfection in the early part of the season, or under the influence of extreme heat, the sowing should be confined to a limited space in the garden. The seeds may be sown broadcast or in drills: if sown in drills, they should be made about fourteen inches apart, and half an inch in depth. The young plants should be thinned to five or six inches asunder. For a succession, a few seeds may be sown, at intervals of a fortnight, until the last week in July; from which time, until the 10th of August, the principal sowing is usually made for the winter's supply. In the Middle States, and the warmer portion of New England, if the season is favorable, a good crop will be obtained from seed sown as late as the last week in August.
Harvesting.—Turnips for the table may be drawn directly from the garden or field until November, but must be harvested before severe freezing weather; for, though comparatively very hardy, few of the varieties will survive the winters of the Northern States in the open ground.
Seed.—As the various kinds readily hybridize, or intermix, only one variety should be cultivated in the same neighborhood for seed. Select the best-formed bulbs, and transplant them out in April, in rows two feet apart, and one foot apart in the rows, just covering the crowns with earth, or leaving the young shoots level with the surface of the ground.
An ounce of seed will sow eight rods of land, and a pound will be sufficient for an acre.
Varieties.—The varieties are numerous, as follow:—
Altrincham. Law.
Yellow Altrincham. Altringham.
This is a yellow-fleshed, field variety, of rather less than average size. The bulb, however, is of a fine, globular shape, with a light-green top, very small neck and tap-root, and possessed of considerable solidity.
Border Imperial.
Border Imperial Purple-top Yellow.