INCREASING PLANTS
"This last garden season we have tried two methods of raising plants: one was by seed; the other by slips or cuttings. The girls will typify still another method with their bulbs. This last method is by division. A bulb as it stores up its nourishment after the blossoming time forms new little bulbs. These may be separated from the parent tuber if large enough. You all saw me dividing my peonies. Those peonies doubtless were started years ago from one or two roots. And now when I dug them up it looked as if I were laying in a stock of sweet potatoes so great was the increase.
"There are just three other methods of propagating or increasing plants. These are layering, budding and grafting.
"Layering is done in several ways. Suppose you have a gooseberry bush you wish to layer. The time to do the work is after the flowering season is past. Choose a branch which has not flowered. Strip off the lower leaves. Now where the old and new wood meet is the place for the cut. Make a cut right into the stem which will be like a tongue. Let this be about an inch long. Hold this to the ground with the cut side down. Bank soil over this. At and under the tongue the new shoots will start, and the new gooseberry bush grow from this. This new plant may be cut off from the parent. If the twig will not stay bent down in this position, cut a forked piece of wood which shall act as a pin. Do you picture this? A branch bent so that not far from the parent plant it is buried under ground with the rest of the root protruding from the ground.
"A rubber plant may be layered or topped as it is called. Rubber plants have an ugly habit of going to top, dropping off their lower leaves as they do this. So they look as if they were trying to develop into huge bushes, and they become very ugly in so doing. The top looks all right and many a person wishes that top were off all by itself and nicely potted.
"This is the way it is topped. A slit is cut in the bark about where you would like to see roots growing. Then soil and florists' moss is bound about the wound. These may easily be kept moist. A paper pot could be put about the soil if one wished. The soil mass should be a ball of about six inches in diameter. When the new roots appear through the moss or poking out of the paper pot, cut the stem of the plant below the pot. And behold you have a little rubber plant just as good as new, I have told this before to the girls.
"Another method of layering is to cut the parent off down to the ground. What is left is called the stool. This stool should be covered with about six inches of earth. Let us suppose this is done in early spring. When fall comes around uncover the stool. There will be found a number of new shoots or plants all nicely protected. These may be transplanted. Do you know that stool can be used over again?
"This work of layering is really very simple. Myron used it with his strawberries. The runners were bent and buried just as those of the gooseberry I spoke of. In this way new strawberry plants were obtained. One shoot may be bent and buried more than once. So one may get just as easily two or more new plants from one shoot. This seems as much a miracle as the cross fertilization of plants.
"The fifth method is that of budding. Apple, peach, plum, cherry and pear trees may be budded; so, too, may roses.
"In a word, a bud is taken from some desirable tree and inserted within the bark of a tree either less desirable or young. Young fruit trees, as you know, need some help before they produce good fruit. Now if George had at home a peach tree which bore very fine fruit he would be glad to cross a young tree with this. Budding is a kind of crossing.
"This work should be done in the spring, although it may be done in the fall. But the spring is a more limber time with Nature. Sap is begining to flow; life is new and fresh again; all the plant world is ready to start up and do something. Then, too, the bark of trees should be in as flexible a condition as possible. The two things really necessary for the work are mature buds and bark easy to peel.
"Buds should be taken from the very strongest and best twigs of the last year's growth. The little seedlings in which the buds are to be inserted should be one year old. These are called the stock.
"This is the manner of inserting the bud: first make a T-shaped cut in the bark of the stock. This cut should be made on the north side of the little tree, because it will thus be more sheltered from the sun's rays. The cut should not be far from the ground on the main trunk, although it may be at the base of strong shoots. But make it in the former position for these yearlings. Then loosen the bark with the flat handle of a regular budding knife. Not many boys and girls own such knives. Some of you have scalpels. The handles of these are flat enough to use. Again, you could easily whittle a piece of wood thin and flat enough for this work.
"The next question is how to sever a bud from its parent shoot. Suppose you have chosen a nice full bud. About a quarter of an inch below the base of the bud start cutting into the wood. Run the knife up to about one quarter of an inch above the bud. Do not cut out through to the surface, but rather from the upper surface cut the bark loose and peel this carefully down until you can see the under surface of the bud. You still have the wood attached to the twig at its upper edge. If as you look at the under surface of the bud you see that it is hollow, throw the whole thing away. If it has fibres then it is all right. The proper layer is left to reunite with the stock. Now the bud and peeled-off bark may be inserted in the T-shaped slip. Bind the bud in place with raffia. Do this raffia bandaging both above and below the slit.
"In about ten days the bandage may come off, for the knitting of fibres is well under way. Now the top of the little tree should be cut right back to about two inches above the bud, because you wish all the growth to go to the bud. This is the part of promise to the tree. All its hope lies in this new bud.
"The best method of increase is that of grafting. A graft or scion, which is a shoot with two or more buds on it of last year's growth, is inserted on the stem of another plant called the stock.
"By means of this process of grafting, trees bearing poor fruit are made to bear good fruit. Wild fruit trees are brought under cultivation, and a given tree may bear several varieties of its given fruit. For example, I have in mind a tree, the marvel of my childhood, which bore big sour apples, beautiful Gravensteins, and a good quality of Baldwins. This sort of experimenting with trees is not only as good as a puzzle, but is of great value. To make a wild apple tree with its gnarly, little sour apples into a really truly, well-behaved tree bearing good fruit is worth while, is it not? Grafting is not only a method of improvement but of taming stock, which is after all improvement.
"There are certain necessary precautions to take in this operation of grafting; for this, like budding, is a surgical operation.
"In all woody branches the outer layer is the bark; next comes the green layer. Between this layer and the real wood is a mass of fibres which go by the name of 'cambium'. The cambium layer of the stock and the scion must be one against the other in grafting in order that the sap may flow freely as before. This layer of cambium might be likened to our blood system. The two cambium layers must be pressed closely together so that the operation may be successful. And finally no cut surface should be left exposed to the air. It is air, you know, that plays havoc with flesh wounds. More and more we see that tree doctors have a work something like our own physicians.
"Grafting is usually done in the spring—in March or April—about the time sap begins to flow. The grafts or scions may be cut before this. Choose the tree from which you wish to take a scion. You choose it because of its fine-flavoured, sound fruit. Perhaps the fruit is especially large, too. Size of fruit, however, does not denote fine fruit. I once had an apple that weighed a pound. It was a beauty, fair to look upon. But what a tasteless, pithy piece of fruit it was. Appearances in fruit are often deceitful. The scions were to be of the last year's growth with two or more buds. The shoots should be clean, healthy and vigorous. You must transmit no disease along with the scions. These may be cut off in January or February, and stuck into the soil for about four to six inches. Keep away from direct sunlight. The buds of scions cut at this time are dormant as they should be.
"Grafting is named according to the manner in which the scion is put into the stock. There is whip grafting, and cleft grafting. Whip grafting is sometimes spoken of as tongue grafting.
"This latter method is accomplished in this way: Suppose you have a scion in your hand. Cut across the end of it diagonally. Use a sharp knife for this, and make a clean cut, as I now cut across this twig. About two-thirds of the distance back from the narrow or more pointed end of the cut make a vertical cut of about an inch right up into the scion. Cut the stock in a similar way. Then insert the tongue of the stock into the slit of the scion. Press these together carefully. Bind with raffia. Whenever this work is done outdoors, as it would be in the case of any of you who try this experiment, the union must be sealed over. As official documents are sealed with wax, so this union is legally sealed in wax. One can buy a regular grafting wax. Sometimes people mix clay and grease together. That is simple, but pretty sticky sounding.
"Realgrafting wax is made this way: To two parts of beeswax, add four of resin. Melt these together with one pound of tallow or linseed oil. When all are melted together, pour into cold water. Pull like molasses candy until it is light coloured. One's fingers should be greased to apply this wax properly.
"Cleft grafting is almost described by its name. A cleft or cut is made in the stock after the stem has been neatly cut across. The cleft is a vertical cut of about an inch in length. This is made through the centre of the stock. The scion is made to fit down into this, so naturally it is cut like a wedge. But there should be cuts made on both sides of the scion diagonally to form this wedge. So two cut surfaces of cambium are laid bare to fit against two similar surfaces of the stock. If the stock is several times thicker than the graft or scion, there should be two of these latter inserted. Place one at either end of the cleft. Bind and wax.
"If the stock is the same thickness as the graft then these two fit perfectly one into the other.
"This is only a little bit about grafting; but I trust this is enough to get you all interested in this work.
"'Is grafting really necessary?' I heard Albert whisper a while ago. It does seem like a great deal of work. The trouble with starting fruit from seed and expecting to get good results lies in this point: Fruit trees seems to lose in their development from seed the ability to produce fruit as fine as the parent stock; and so grafting becomes a necessity. Strange that this should be so, but it is.
"Start with a peach stone or seed. It came from a fine tree; the fruit was luscious. And yet the little seedling which comes from that very stone as a rule must be grafted to bear fruit of equally fine flavour as that of the original peach. Fruit trees have a tendency to revert to old wild poor forms. And so we must save them and help them.
"If any of you should start a little orchard he would wish to know how far apart the trees should be. Apple trees should be set thirty to forty feet apart each way; pear trees twenty to thirty feet each way; plums and peaches sixteen to twenty feet each way. Trees need room in which to spread out and develop; hence the distance given them. I am glad that Myron has made a start on small fruits. His strawberries were a success. I'd like to think that next season each of you was to have in his garden, vegetables, flowers, one small fruit and one of the larger ones, such as a seedling apple or peach."