When the young vines have made a growth of two or three inches shift them into three-inch pots.
So far we have used only pure sand, which did not contain much plant food, because the growth was produced from the food stored up in the bud and wood, and what little they obtained from the sand, water, and air. Now, however, our young vines want more substantial food. They should therefore be potted into soil, mixed from rotten sod, leaf-mould, and well-decomposed old barnyard manure. This should be mixed together six months before using; add, before using, one-quarter sand, then mix thoroughly, and sift all through a coarse sieve. In operating, put a quantity of soil on the potting bench, provide a quantity of broken bricks or potsherds for drainage, loosen the plants from the pots by laying them on their side, giving them a sudden jar with the hand, to loosen the sand around them; draw out the plant carefully, holding it with one hand, while with the other you place a piece of the drainage material into the pot; cover it with soil about an inch; then put in the plant, holding it so that the roots spread out naturally; fill in soil around them until the pot is full; press the soil down firmly, but not hard enough to break the roots. When the plants are potted give them water to settle the earth around the roots, and keep the air somewhat confined for a few days, until they have become established, when more air may be given them. Keep the temperature at 85° to 95° during the day, and 70° to 80° during the night.
When the plants have made about six inches of growth they can either be placed in another house, or in hot-bed frames, if they are to be kept under glass. The usual manner of keeping them in pots during summer, shifting them into larger and larger sizes, I consider injurious to the free development of the plants, as the roots are distorted and cramped against the sides of the pots, and cannot spread naturally. I prefer shifting them into cold frames, in which beds have been prepared of light, rich soil, into which the young plants can be planted, and kept under whitewashed hot-bed sashes for a while, which, after several weeks, may be removed, and only a light shading substituted in their place, which, after several weeks more, can also be removed. Thus the young plants are gradually hardened, their roots have a chance to spread evenly and naturally, without any cramping; and such plants, although they may not make as tall a growth as those kept under glass all the season, will really stand transplanting into the vineyard much better than those hot-house pets, which may look well enough, but really are, like spoiled and pampered children, but poorly fitted to stand the rough vicissitudes of every-day life.
The young plants should be lightly tied to small sticks provided for the purpose, as it will allow free circulation of air, and admit the sun more freely to the roots. In the fall, after their leaves have dropped, they should be carefully taken up, shortened to about a foot of their growth, and they are then ready either to sell, if they are to be disposed of in that way, or for planting into the vineyard. They should, however, be carefully assorted, making three classes of them—the strongest, medium, and the smallest—each to be put separate. The latter generally are not fit to transplant into the vineyard, but they may be heeled in, and grown in beds another year, when they will often make very good plants. Heeling in may be done as shown in Figure 2, laying the vines as close in the rows as they can conveniently be laid, and then fill the trench with well-pulverized soil. They can thus be safely kept during the winter.
Fig. 2.
I have only given an outline of the most simple and cheapest mode of growing plants from single eyes, such as even the vineyardist may follow. For descriptions of more extensive and costly buildings, if they desire them, they had better apply to an architect. I have also not given the mode of propagating from green wood, as I do not think, plants thus propagated are desirable. They are apt to be feeble and diseased, and I think, the country at large would be much better off, had not a single plant ever been produced by that method.
Plants from single eyes may also be grown in a common hot-bed; but as in this the heat can not be as well regulated at will, I think it, upon the whole, not desirable, as the expense of a propagating house on the cheap plan I have indicated, is but very little more, and will certainly in the long run, pay much better. Of course, close attention and careful watching is the first requisite in all the operations.
III.—BY CUTTINGS IN OPEN AIR.