SWEET POTATO.
This is a Southern plant, but is now being acclimated in Northern latitudes. Good sweet potatoes are now grown in the colder parts of Vermont, Wisconsin, and Minnesota. There are many varieties, and they are increasing by seedlings. Not long since, they were said to bear no seed; but recently, in different parts of the country, seeds have been found, and new varieties grown from them. Certain varieties are best in different localities. They will always find their way through growers of plants. The process of growing is simple, but must be carefully followed to insure success. Plant the seed potatoes in a moderate hotbed, at the time when grass begins to start freely. Keep well watered, and do not allow them to get too warm. An hour's over-heating will cause them all to decay. The heat, when it begins to rise too high, is at once checked by a thorough drenching with cold water: if too low, the heat is raised by a tight cover, in a warm sun, and by watering with warm water. Water them every day after they are up. The sprouts, when six inches high, are pulled off from the potato, and set out as cabbage-plants; this should be done as soon as all danger of frost has ceased. The same potatoes will sprout as many times as they are pulled off.
Sweet potatoes need much sun and warmth; they are, therefore, planted on round hills, or, better, on ridges, which may be principally thrown up with a plow, and made from a foot to eighteen inches high. Set the plants in the top, about fifteen inches or two feet apart; keep clear of weeds, making the hill or ridge a little larger by each hoeing. The tops, being long running vines, will soon cover the ground. They produce better tubers for throwing the vines, in a twist, up over the top of the rows. They will take root at each joint of vine, when undisturbed, which roots will draw from the main tuber. These roots would be as good and large as any, if they had time: hence, at the South, one half of the crop is grown from sets, from cuttings of the ends of the early-planted vines. At the North, where seasons are short, these joints must be prevented—by throwing up, as above, or loosening—from taking root. The tubers will need all the strength; the plant and tuber are tender, and a little frost will kill the vines and cause the potatoes to decay. They may be kept for use until January by packing, when dug in a warm day, in the soil in which they grew;—kept through winter, packed in straw or chaff, in boxes that will contain about two or three bushels each, and kept in a room with a fire: the room should be at a temperature of from forty to sixty degrees; fifty-five is best, though seventy will not destroy them; more or less will cause them to decay. The boxes may be placed one upon another, but should be left open, that their moisture may evaporate. Dry sand (kiln-dried), sifted over and close among them, will preserve them. Free circulation of air is indispensable. It is usually cheapest to buy the plants of those who make a business of raising them. They are very hardy—may be transported one thousand miles and do just as well. To transplant with perfect safety in a dry time, after the plant has been put in its place, pour in a pint of water, and cover it with a little dry soil to prevent baking—and not one out of fifty will perish.
These few brief directions will enable any one to be successful wherever corn will grow. A new variety has just been brought into Alabama from Peru, that is pronounced superior to all others; a prodigious bearer, even on poor sandy land, and far more hardy than other varieties, the root retaining its excellence as it came out of the ground till the following May.