The above is for onions eaten raw in the green state when less than half grown. For the main crop for bulbs, the home supply is best grown from prickers as described above. Prize-taker and Gibraltar are mostly used for this purpose, growing to the size of the large Spanish onions sold at grocery stores. For onions to be kept for late winter and spring use, grow from seed, sowing outdoors as early as possible.
No vegetable needs a richer or more perfectly prepared soil than the onion; and especial care must be taken never to let the weeds get a start. They are gathered after the tops dry down and wither, when they should be pulled, put in broad rows for several days in the sun, and then spread out flat, not more than four inches deep, under cover with plenty of light and air. Before severe freezing store in slatted barrels, as described in Chapter XIV.
Parsnip:--Sow as early as possible, in deep rich soil, but where no water will stand during fall and winter. The seed germinates very slowly, so the seed-bed should be very finely prepared. They will be ready for use in the fall, but are much better after the first frosts.
For method of keeping see Chapter XIV.
Potato:--If your garden is a small one, buy your main supply of potatoes from some nearby farmer, first trying half a bushel or so to be sure of the quality. Purchase in late September or October when the crop is being dug and the price is low.
For an extra early and choice supply for the home garden, start a peck or so in early March, as follows: Select an early variety, seed of good size and clean; cut to pieces containing one or two eyes, and pack closely together on end in flats of coarse sand. Give these full light and heat, and by the middle to end of April they will have formed dense masses of roots, and nice, strong, stocky sprouts, well leaved out. Dig out furrows two and a half feet apart, and incorporate well rotted manure in the bottom, with the soil covering this until the furrow is left two to three inches deep. Set the sprouted tubers, pressing firmly into the soil, about twelve inches apart, and cover in, leaving them thus three to four inches below the surface. Keep well cultivated, give a light top dressing of nitrate of soda--and surprise all your neighbors! This system has not yet come extensively into use, but is practically certain of producing excellent results.
For the main crop, if you have room, cut good seed to one or two eyes, leaving as much of the tuber as possible to each piece, and plant thirteen inches apart in rows three feet apart. Cultivate deeply until the plants are eight to ten inches high and then shallow but frequently. As the vines begin to spread, hill up moderately, making a broad, low ridge. Handle potato-bugs and blight as directed in Chapter
XIII. For harvesting see Chapter XIV.
While big crops may be grown on heavy soils, the quality will be very much better on sandy, well drained soils. Planting on well rotted sod, or after green manuring, such as clover or rye, will also improve the looks and quality of the crop. Like onions, they need a high percentage of potassium in manures or fertilizers used; this may be given in sulphate of potassium. Avoid planting on ground enriched with fresh barnyard manure or immediately after a dressing of lime.