Peter Henderson, in his valuable book, "Gardening for Profit," figures this insect and its larvae accurately, and says: "Whenever the eggs or larvae appear, cut and burn the plants as long as any traces of the insect are seen. This must be done if it destroys every vestige of vegetation." He and other authorities speak of the advantage of cooping a hen and chickens in the bed. Most emphatically would I recommend this latter course, for I have tried it with various vegetables. Active broods of little chickens here and there in the garden are the best of insecticides, and pay for themselves twice over in this service alone.
We will next speak of the ONION, because it is so hardy that the earlier it is planted in spring the better. Indeed, I have often, with great advantage, sown the seed on light soils the first of September, and wintered over the young plants in the open ground. Nature evidently intended the onion for humanity in general, for she has endowed the plant with the power to flourish from the tropics to the coldest limit of the temperate zone.
While onions are grown in all sorts of careless ways, like other vegetables, it is by far the best plan to select a space for an annual and permanent bed, just as we do for asparagus. Unlike most other crops, the onion does not require change of ground, but usually does better on the same soil for an indefinite number of years. Therefore I would advise that upon the Home Acre the onion, like the asparagus bed, should be made with a view to permanence.
Not much success can be hoped for on rough, poor land. The onion, like the asparagus bed, should be made and maintained with some care. If possible, select a light, well-drained, but not dry plot. Make the soil rich, deep, mellow, to the depth of twenty inches, taking out all stones, roots, etc.; cover the land with at least six inches of good strong barnyard manure. This should be done in the autumn. Sow the ground white with salt, as in the case of asparagus, and then mingle these fertilizers thoroughly with the soil, by forking or plowing it at once, leaving the surface as rough as possible, so that the frost can penetrate deeply. Just as soon as the ground is dry enough to work in the spring, fork or plow again, breaking every lump and raking all smooth, so that the surface is as fine as the soil in a hot-bed. You cannot hope for much in heavy, lumpy ground. Sow at least three seeds to the inch in a shallow drill one inch deep, and spat the earth firmly over the seed with the back of a spade or with your hand. In subsequent culture little more is required than keeping the MERE SURFACE stirred with a hoe, and the rows clean of weeds. Onions are not benefited by deep stirring of the soil, but the surface, from the start, should be kept clean and scarified an inch or two deep between the rows during the growing season. I prefer to have my onions growing at the rate of one or two to every inch of row, for I do not like large bulbs. I think that moderate-sized onions are better for the table. Those who value largeness should thin out the plants to three or four inches apart; but even in the market there is less demand for large, coarse onions. When the tops begin to fall over from their own weight, in August or September, leave them to mature and ripen naturally. When the tops begin to dry up, pull them from the soil, let them dry thoroughly in the sun, and then spread them thinly in a dry loft till there is danger of their freezing. Even there they will keep better, if covered deeply with straw, hay, etc., than in a damp cellar. Wherever the air is damp and a little too warm, onions will speedily start to grow again, and soon become worthless. After the crop has been taken, the ground should be treated as at first—thoroughly enriched and pulverized late in autumn, and left to lie in a rough state during the winter, then prepared for planting as early as possible. I prefer March sowing of the seed to April, and April, by far, to May. In England they try to plant in February. Indeed, as I have said, I have had excellent success by sowing the seed early in September on light soils, and letting the plants grow during all the mild days of fall, winter, and early spring. By this course we have onions fit for the table and market the following May. In this latitude they need the protection of a little coarse litter from December 1 to about the middle of March. Only the very severest frost injures them. Most of us have seen onions, overlooked in the fall gathering, growing vigorously as soon as the thaws began in spring. This fact contains all the hint we need in wintering over the vegetable in the open ground. If the seed is sown late in September, the plants do not usually acquire sufficient strength in this latitude to resist the frost. It is necessary, therefore, to secure our main crop by very early spring sowings, and it may be said here that after the second thorough pulverization of the soil in spring, the ground will be in such good condition that, if well enriched and stirred late in autumn, it will only need levelling down and smoothing off before the spring sowing. Onions appear to do best on a compact soil, if rich, deep, and clean. It is the SURFACE merely that needs to be stirred lightly and frequently.
If young green onions with thin, succulent tops are desired very early in spring, it will be an interesting experiment to sow the seed the latter part of August or early in September. Another method is to leave a row of onions in the garden where they ripened. When the autumn rains begin, they will start to grow again. The winter will not harm them, and even in April there will be a strong growth of green tops. The seed stalk should be picked off as soon as it appears in spring, or else the whole strength will speedily go to the formation of seed.
It should be remembered that good onions can not be produced very far to the south by sowing the small gunpowder-like seed. In our own and especially in warmer climates a great advantage is secured by employing what are known as "onion sets." These are produced by sowing the ordinary black seed very thickly on light poor land. Being much crowded, and not having much nutriment, the seed develop into little onions from the size of a pea to that of a walnut, the smaller the better, if they are solid and plump. These, pressed or sunk, about three inches apart, into rich garden soil about an inch deep, just as soon as the frost is out, make fine bulbs by the middle of June. For instance, we had in our garden plenty of onions three inches in diameter from these little sets, while the seed, sown at the same time, will not yield good bulbs before August. There is but little need of raising these sets, for it is rather difficult to keep them in good condition over the winter. Any seedsman will furnish them, and they are usually on sale at country stores. Three or four quarts, if in good condition, will supply a family abundantly, and leave many to be used dry during the autumn. Insist on plump little bulbs. If you plant them early, as you should, you will be more apt to get good sets. Many neglect the planting till the sets are half dried up, or so badly sprouted as to be wellnigh worthless. They usually come in the form of white and yellow sets, and I plant an equal number of each.
The chief insect enemies are onion maggots, the larvae of the onion fly. These bore through the outer leaf and down into the bulb, which they soon destroy. I know of no remedy but to pull up the yellow and sickly plants, and burn them and the pests together. The free use of salt in the fall, and a light top-dressing of wood-ashes at the time of planting, tend to subdue these insects; but the best course is prevention by deeply cultivating and thoroughly enriching in the fall, leaving the ground rough and uneven for the deep action of frost, and by sowing the seed VERY early in spring. I have found that the insect usually attacks late-sown and feeble plants. If the maggot were in my garden, I should use the little sets only.
Some special manures have been employed in attaining the greatest success with this vegetable. In England, pigeon-dung and the cleanings of the pigsty are extensively employed. In this country the sweepings of the hen-roost are generally recommended. It should be remembered that all these are strong agents, and if brought in contact with the roots of any vegetable while in a crude, undiluted state, burn like fire, especially in our climate. What can be done in safety in England will not answer under our vivid sun and in our frequent droughts. These strong fertilizers could be doubled in value as well as bulk by being composted with sods, leaves, etc., and then, after having been mixed, allowed to decay thoroughly. Then the compost can be used with great advantage as a top-dressing directly over the drills when either sets or seeds are planted. The spring rains will carry the richness from the surface to the roots, and insure a very vigorous growth. When the compost named in the early part of this paper is used, I sow it thickly IN the drill, draw a pointed hoe through once more, to mingle the fertilizer with the soil, and then forthwith sow the seeds or put in the sets one inch deep; and the result is immediate and vigorous growth. Wood-ashes and bone-dust are excellent fertilizers, and should be sown on the surface on the row as soon as planted, and gradually worked in by weeding and cultivation during the growing season. Manure from the pigsty, wherein weeds, litter, sods, muck, etc., have been thrown freely during the summer, may be spread broadcast over the onion bed in the autumn, and worked in deeply, like the product of the barnyard. The onion bed can scarcely be made too rich as long as the manure is not applied in its crude, unfermented state at the time of planting. Then, if the seed is put in very early, it grows too strongly and quickly for insects to do much damage.
Varieties.—Thompson in his English work names nineteen varieties with many synonyms; Henderson offers the seed of thirteen varieties; Gregory, of seventeen kinds. There is no need of our being confused by this latitude of choice. We find it in the great majority of fruits and vegetables offered by nurserymen and seedsmen. Each of the old varieties that have survived the test of years has certain good qualities which make it valuable, especially in certain localities. Many of the novelties in vegetables, as among fruits, will soon disappear; a few will take their place among the standard sorts. In the case of the kitchen, as well as in the fruit, garden, I shall give the opinion of men who have a celebrity as wide as the continent for actual experience, and modestly add occasionally some views of my own which are the result of observation.
As a choice for the home-garden, Mr. Henderson recommends the following varieties of onions: Extra Early Red, Yellow Globe Danvers, White Portugal or Silver Skin, and Southport Yellow Globe. Mr. Joseph Harris, the well-known and practical author: Yellow Danvers, Extra Early Large Bed, and White Globe. Mr. J. J. H. Gregory: New Queen, Early Yellow Acker, Yellow Danvers, Early Red Globe Danvers, Large Red Wethersfield. They all recommend onion sets. The Queen onion is quite distinct. For the home table, where earliness, as well as quality, size and quantity is desired, I think the Queen deserves a place. It is admirably fitted for pickling. I have tried all the varieties named, with good success, and grown some of the largest kinds to six inches in diameter.