The native strain of cultivated strawberries has so much vigor and power of adaptation that plenty of excellent varieties can be grown on the lightest soil. In this instance, however, we would suggest important modifications in preparation and culture. The soil, as has been already shown, must be treated like a spendthrift. Deep plowing or spading should be avoided, as the subsoil is too loose and leachy already. The initial enriching of the bed should be generous, but not lavish. You cannot deposit fertilizers for long-continued use. I should prefer to harrow or rake in the manure, leaving it near the surface. The rains will carry it down fast enough. One of the very best methods is to open furrows, three feet apart, with a light corn-plow, half fill them with decayed compost, again run the plow through to mix the fertilizer with the soil, then level the ground, and set out the plants immediately over the manure. They thus get the benefit of it before it can leach away. The accomplished horticulturist Mr. P. T. Quinn, of Newark, N. J., has achieved remarkable success by this plan.
It is a well-known fact that on light land strawberry plants are not so long-lived and do not develop, or "stool out," as it is termed, as on heavier land. In order to secure the largest and best possible crop, therefore, I should not advise a single line of plants, but rather a narrow bed of plants, say eighteen inches wide, leaving eighteen inches for a walk. I would not allow this bed to be matted with an indefinite number of little plants crowding each other into feeble life, but would leave only those runners which had taken root early, and destroy the rest. A plant which forms in June and the first weeks in July has time to mature good-sized fruit-buds before winter, especially if given space in which to develop. This, however, would be impossible if the runners were allowed to sod the ground thickly. In principle I would carry out the first system, and give each plant space in which to grow upon its own root as large as it naturally would in a light soil, and I would have a sufficient number of plants to supply the deficiency in growth. On good, loamy soil, the foliage of single lines of plants, three feet apart, will grow so large as to touch across the spaces; but this could scarcely be expected on light soil unless irrigation were combined with great fertility. Nevertheless, a bed with plants standing not too thickly upon it will give an abundance of superb fruit.
Strawberries grown in beds may not require so much spring mulching to keep the fruit clean, but should carefully receive all that is needed. Winter protection also is not so indispensable as on heavier soils, but it always well repays. A thick bed of plants should never be protected by any kind of litter which would leave seeds of various kinds, for under this system of culture weeds must be taken out by hand; and this is always slow, back-aching work.
When plants are grown in beds it does not pay to continue them after fruiting the third year. For instance, they are set out in spring, and during the first season they are permitted to make a limited number of runners, and prepare to fruit the following year. After the berries are picked the third year, dig the plants under, and occupy the ground with something else. On light soils, and where the plants are grown in beds instead of narrow rows, new beds should be set out every alternate year.
In order to have an abundant supply of young plants it is only necessary to let one end of a row or a small portion of a bed run at will. Then new plants can be set out as desired.
While more strawberries are planted in spring than at any other time, certain advantages are secured by summer and fall setting. This is especially true of gardens wherein early crops are maturing, leaving the ground vacant. For instance, there are areas from which early peas, beans, or potatoes have been gathered. Suppose such a plot is ready for something else in July or August, the earlier the better. Unless the ground is very dry, a bed can be prepared as has been described. If the soil is in good condition, rich and deep, it can be dug thoroughly, and the plants set out at once in the cool of the evening, or just before a shower. During the hot season a great advantage is secured if the plants are set immediately after the ground is prepared, and while the surface is still moist. It is unfortunate if ground is made ready and then permitted to dry out before planting takes place, for watering, no matter how thorough, has not so good an influence in starting new growth as the natural moisture of the soil. It would be better, therefore, to dig the ground late in the afternoon, and set out the plants the same evening. Watering, however, should never be dispensed with during warm weather, unless there is a certainty of rain; and even then it does no harm.
Suppose one wishes to set a new bed in July. If he has strawberries growing on his place, his course would be to let some of his favorite varieties make new runners as early as possible. These should be well-rooted young plants by the middle of the month. After the new ground is prepared, these can be taken up, with a ball of earth attached to their roots, and carried carefully to their new starting-place. If they are removed so gently as not to shake off the earth from the roots, they will not know that they have been moved, but continue to thrive without wilting a leaf. If such transplanting is done immediately after a soaking rain, the soil will cling to the roots so tenaciously as to ensure a transfer that will not cause any check of growth. But it is not necessary to wait for rain. At five in the afternoon soak with water the ground in which the young plants are standing, and by six o'clock you can take up the plants with their roots incased in clinging earth, just as successfully as after a rain. Plants thus transferred, and watered after being set out, will not wilt, although the thermometer is in the nineties the following day. If young plants are scarce, take up the strongest and best-rooted ones, and leave the runner attached; set out such plants with their balls of earth four feet apart in the row, and with a lump of earth fasten down the runners along the line. Within a month these runners will fill up the new rows as closely as desirable. Then all propagation in the new bed should be checked, and the plants compelled to develop for fruiting in the coming season. In this latitude a plant thus transferred in July or August will bear a very good crop the following June, and the berries will probably be larger than in the following years. This tendency to produce very large fruit is characteristic of young plants set out in summer. It thus may be seen that plants set in spring can not produce a good crop of fruit under about fourteen months, while others, set in summer, will yield in nine or ten months. I have set out many acres in summer and early autumn with the most satisfactory results. Thereafter the plants were treated in precisely the same manner as those set in spring.
If the plants must be bought and transported from a distance during hot weather, I should not advise the purchase of any except those grown in pots. Nurserymen have made us familiar with pot-grown plants, for we fill our flowerbeds with them. In like manner strawberry plants are grown and sold. Little pots, three inches across at the top, are sunk in the earth along a strawberry row, and the runners so fastened down that they take root in these pots. In about two weeks the young plant will fill a pot with roots. It may then be severed from the parent, and transported almost any distance, like a verbena. Usually the ball of earth and roots is separated from the pot, and is then wrapped in paper before being packed in the shallow box employed for shipping purposes. A nurseryman once distributed in a summer throughout the country a hundred thousand plants of one variety grown in this manner. The earth encasing the roots sustained the plants during transportation and after setting sufficiently to prevent any loss worth mentioning. This method of the plant-grower can easily be employed on the Home Acre. Pots filled with earth may be sunk along the strawberry rows in the garden, the runners made to root in them, and from them transferred to any part of the garden wherein we propose to make a new bed. It is only a neater and more certain way of removing young plants with a ball of earth from the open bed.
Some have adopted this system in raising strawberries for market. They prepare very rich beds, fill them with pot-grown plants in June or July, take from these plants one crop the following June, then plow them under. As a rule, however, such plants cannot be bought in quantities before August or September.
As we go south, September, October, or November, according to lowness of latitude, are the favorite months for planting. I have had excellent success on the Hudson in late autumn planting. My method has been to cover the young plants, just before the ground froze, with two or three inches of clean earth, and then to rake it off again early in April. The roots of such plants become thoroughly established during the winter, and start with double vigor. Plants set out in LATE autumn do best on light, dry soils. On heavy soils they will be frozen out unless well covered. They should not be allowed to bear the following season. A late-set plant cannot before winter in our climate become strong and sturdy enough to produce much fruit the following season. I make it a rule not to permit plants set out after the first of October to bear fruit until a year from the following June.