Dwarf Fruit Trees

XI

BUSH FRUITS

The bush fruits, so far as I know, are never cultivated as dwarfs. To speak more exactly I should say that no dwarf stock is ever used to reduce the size to which the plants grow. On the other hand, bush fruits are often systematically pruned back in order to restrict their size, and are sometimes trained in elaborate forms as dwarf fruit trees are. To this extent they are managed in the same way and might properly be treated in the same general category. What is more to our purpose, they are almost always included in the plan of any private fruit garden on a restricted area, such as we have had chiefly in view in this discussion of dwarf fruit trees. These reasons make it appropriate, if not indeed essential, that something should be said regarding these fruits here.

All bush fruits can be grown in such forms as cordons, espaliers, etc. Anything of this sort which the gardener wishes can become a part of his garden of little trees. Gooseberries and currants offer the most entertainment and remuneration when subjected to special pruning and training, and indeed they should not be omitted from any garden scheme of this kind. Raspberries are less amenable to this kind of education and should be introduced with some care. Blackberries are necessarily difficult to handle and no very complicated schemes of pruning and training can be successfully applied to them. Such other fruits as Loganberries, strawberry-raspberries, June berries, etc., may be introduced "at the owner's risk." Any of them will submit to a certain amount of correction with the pruning knife, and may add to the variety of fruits grown in the amateur's garden. Of course, it is distinctly understood that these special methods of treatment are not commercially recommended for any of the bush fruits in America.

FIG. 38—CURRANTS AS FAN ESPALIERS ON TRELLIS, HARTFORD, CONN.

Probably the most interesting and practical way for handling gooseberries and currants in dwarf fruit gardens is the form known as standards. This form consists of a small round fruiting top of almost any desired variety grafted high upon a straight clean trunk or stem. This stem may have any convenient height from two to ten feet, the most common and practical height being about four feet. The stock used is the flowering currant, Ribes aureum, which forms a sufficiently strong and upright growth for this purpose. Nevertheless it is almost always necessary to support these standards with a convenient stake apiece. For the present these standard gooseberries and currants can be obtained only of the European nurserymen. At least the writer knows of no one who propagates them in America. There are several importers, however, who make a business of supplying European stock and who are always glad to import these on order.

The finer varieties are especially chosen for growing as standards. This applies particularly to gooseberries, which are more widely grown and which are more highly prized in Europe than in this country. The varieties grown in Europe are usually finer table fruits than the American varieties. It is generally understood that the finest fruits for eating fresh out of hand are secured from the standard gooseberries.

FIG. 39—GOOSEBERRY FAN ESPALIER

Variety Industry, trained on wire trellis

Gooseberries and currants are also adapted easily to the espalier form. The most elaborate palmettes and other geometrical designs can be worked out. Nevertheless the simplest and most practical form for trained gooseberries and currants is the fan shape. If a suitable trellis is provided, the vines may be easily tied out upon it in very attractive fan forms and these are found to be quite satisfactory, both as regards their looks and their product of fruit. They are also easily sprayed, which is a consideration worth mentioning when one has to fight the currant worm. In general, it is best in our latitude to run these espaliers north and south, because they receive too much sun when the trellis runs east and west. This rule, however, is not absolute.

Probably the most convenient and practical way for growing these fruits in the dwarf tree garden is to plant standards at regular intervals in a row, say six feet apart, and to plant a certain number of fan shaped bushes between each pair of standards in the row. If these standards were six feet apart, two plants for fan training would be enough between each pair. The top of the trellis on which the fan forms are tied, would not be above four feet high, better only three. The heads of the standards then rise well above the top of the trellis. This furnishes some support for the stem of the standard and economizes space. Economy of space is one of the first principles of this style of gardening.

FIG. 40—TREE FORM GOOSEBERRY

No list need be given here of the varieties of gooseberries and currants to be recommended for this class of planting. It may be said that any of the favorite varieties of currants grown in this country, as for example, Fay, Victoria, Red Versailles, etc., may be chosen, and that these are indeed the varieties usually preferred in Europe. With respect to gooseberries it may be remarked that the English, French, and German varieties are mostly very different from those grown in America, and that while they have some shortcomings in our climate, they are for the most part to be recommended for the purposes which we here have in view.

XII

FRUIT TREES IN POTS

Those who are used to seeing large fruit trees in orchard plantations where each specimen has 1,000 to 2,000 square feet of space, with unlimited opportunities downward, find a fruit tree in a pot a curiosity. It seems remarkable to see a tree in vigorous health and bearing fruit with less than one cubic foot of soil. Nevertheless this method of handling fruit trees is entirely practicable. In some places it is practised extensively in an amateur way, and occasionally reaches almost commercial proportions. For those who grow fruit trees for recreation there could hardly be a more interesting experiment.

The pots mostly used are the nine, ten, eleven and twelve inch standard earthenware pots. With most trees it is best to begin with small sizes and gradually shift forward to the larger ones. A bearing tree may be maintained for several years in a twelve inch pot or even in a ten inch size. Sometimes wooden tubs are substituted for pots. These look better, but are not so good in any other way.

Trees may be grown in pots out of doors, although there is no particular advantage in doing this. If such practise is undertaken the pots should be plunged their full depth in good garden soil. Perfect drainage should be secured by having some broken brick or coarse cinders underneath.

Usually potted trees are grown under glass. They are kept in a cool greenhouse, that is one with little heat. Sometimes they are without artificial heat. In fact this is probably the best way. The houses which are purposely constructed for fruit trees may have a single line of pipe if this is convenient, so that the chill may be taken off the air in severe cold weather. To reach anything like real success, houses must be devoted exclusively to fruit trees. Occasionally trees may be grown with other plants, as in cold graperies, but the results are not the best and often come very close to failure.

In building houses for fruit trees exclusively, the even span construction is nearly always used. Houses eighteen or twenty feet wide, and five feet high at the eaves, will answer the purpose very well. The leading greenhouse designers are prepared to furnish plans for such houses and it is usually best to follow the advice of their experts.

All kinds of fruit trees can be grown in pots. This includes apples, pears, peaches, plums, nectarines, and cherries. Those which give the best returns are plums and nectarines. Apples in pots are very interesting and furnish a superior quality of fruit when grown under glass. Apples, plums and nectarines take a finer finish and a higher flavor when grown in this way than when grown in any other.

All fruit trees to be grown in pots should be propagated on the dwarfest of dwarfing stocks. This means practically that apples should be on Paradise, pears on quince, peaches and nectarines on sand cherry, plum on sand cherry or St. Julien plum, and cherries on Mahaleb.

FIG. 41—A FRUITING PEACH IN POT

The trees should be potted in good rich soil, preferably the best garden loam. This should have enough sand and gravel in it to insure good drainage. A considerable amount of drainage material should be placed in the bottom of each pot. The trees should be repotted in fresh soil annually in October or November.

Trees in pots require liberal feeding. Besides being given well enriched earth at the time of repotting, they should be supplied from time to time with small amounts of fertilizer. Good soluble chemical fertilizers can be applied either dry or dissolved. A good formula is one part nitrate of soda, two parts of muriate of potash, two parts of high grade phosphoric acid. A very little sprinkling, say a tablespoonful, of this can be given on each pot once a month during the growing season which lasts roughly from December to May. In place of this, or alternately with this, moderate waterings with liquid manure may also be given. These small doses of food are especially useful at the time when the fruit is forming on the trees.

The trees are usually brought into the house at the time of potting, say November 1. If early fruit is desired, they are kept in a house with some heat. It is necessary only that the temperature should be kept constantly and safely above the freezing point. Rapid forcing with a high temperature is not desirable and is hardly possible. If kept simply above the freezing point, these trees will start into growth in January. They can then be kept somewhat warmer during February, the heat being slightly increased in March. Peaches and nectarines will stand fairly high temperatures after the fruit is well set and especially toward ripening time. By this method of mild forcing, plums, peaches, and nectarines can be brought into fruit as early as the latter part of May.

FIG. 42—A FIG TREE IN A POT

The main crop of potted fruits, however, need not be expected until June or July; that is not very much in advance of the outdoor crop. The object of growing fruit under glass is not so much to force it ahead of season as it is to improve the quality. Trees which are to be kept in a cool house without heat need no particular attention except to see that they are watered occasionally and that some plant food is given after growth begins. Even if the temperature goes down considerably below freezing during the winter months in this cold house where the potted fruit trees are, no damage need be expected.

Of course, special care will be given to prevent damage from attacks of fungi or insects which occasionally become troublesome in the houses. The small size of these trees makes such work comparatively easy.

The methods of pruning are the same as those recommended for pyramid and bush form trees. These forms are the most practical for pot culture, though pot trees are occasionally trained in cordon forms.

XIII

PERSONALIA

Many persons have a strong prejudice in favor of the concrete. On general principles they object to generalities. They choose rather the specific case. Personal experience, they say, means more to them than theory, even though the theory be the sublimation of all experience. For the benefit of such people I am going to set down an account of some of my own attempts at growing dwarf fruit trees, and to that I will add brief opinions and experiences of some friends of mine.

The first dwarf fruit tree that I ever saw, so far as I remember, was in the grounds of the Kansas State Agricultural College when I was a student there. This tree was an apple, on Paradise stock, and at two years after planting it bore six or eight very fine Yellow Transparent apples. It was one of several dwarf apples planted by Professor E. A. Popenoe, but the other trees did not much attract my attention. This particular specimen had a straight, clean trunk of about thirty inches, after the absurd style of heading dwarf apples practised in most American nurseries. But the crown was full and symmetrical, and the fruit was incomparable. That particular tree has always been a sort of ideal and inspiration to me.

Later, when I planted an orchard in Oklahoma, I put in some dwarf trees, particularly pears, but I did not stay there long enough to see what came of them.

The next fruit garden in which I became interested was in Vermont. This had in it some dwarf pear trees, dwarf apples and dwarf plums, and my own personal experience had fairly begun. The dwarf apples proved to be an almost complete failure, for reasons which I can not now satisfactorily explain. A few years later I planted a few dwarf apple trees in another Vermont garden, where they did reasonably well. But, at any rate, the whole undertaking was unsatisfactory, for it did not give me a vital understanding of the trees. I never got onto terms of real personal goodfellowship with them; and until a gardener does that his work is some sort of a failure.

The dwarf pears did somewhat better. They seemed to understand their business, and they kept about it without much attention from me. I never cared much for pears, anyway.

But the plums were the brilliant success, at least with reference to my own interior personal experience. Every plum tree meant something to me. A stub of a root and two scrawny plum branches would at any time arouse my imagination like the circus posters' appeal to a boy. In this Vermont garden which I adopted when it was about four years old, there were various plum trees, mostly of domestica varieties, growing on Americana roots. They had come from the Iowa State College, where they had been educated that way. They had been given those Americana roots, not primarily to dwarf them, but to insure them against damage from the cold winters. The tops had not been cut back, and the whole treatment was just such as would have been applied to standards. Later I saw the bad results of this treatment, for several of the trees blew over in high winds. From subsequent experience I feel sure that if they had been headed low at first, if they had been kept closely headed back and otherwise handled like real dwarfs, they would have lived to a greater age and would have made everybody happier.

At this time also I began, on a somewhat comprehensive plan, the propagation of plums on all sorts of stocks, including Americana, Wayland seedlings, Miner root cuttings and sand cherry, all more or less efficient dwarfing stocks. By this time I was into it head over ears, as far as the plums were concerned.

This having been the largest chapter in my personal pomological experience, I suppose it ought to form the largest portion of this chapter in the book; but my plum work and my experiments in propagation have been so often and so fully reported elsewhere that it would be a vain repetition to go over them again now. They are all written down in the proper places where they may be consulted by the enthusiastic or ill-advised student.

And then I came to Massachusetts; and here the first project, almost, to which my hand was turned was the installation of a garden of dwarf fruit trees. From the following memorandum of the trees growing in this garden any reader may surmise the enjoyment I have found in it. There is one row of dwarf plum trees set six feet apart and trained, rather unsatisfactorily, into bush form. The trees were many of them too large when they came from France, and, though I cut them back severely, they did not form such low bushy heads as my ideal species. They are on St. Julien roots, which serve the purposes in hand fairly well. Though the trees had a hard trip across the water only one out of forty-six has died in three years. Unfortunately these trees have not yet borne fruit,—not one of them. Next year many of them will bear. Earlier fruitage can certainly be secured on sand cherry stocks and under other methods of training.

Besides the bush plums, the garden contains a row of upright cordons. Most of these were not propagated on dwarf stocks at all, and were not expected to suffer any such drastic training as I have put upon them. They were taken from the college nursery and from the nurseries of several of my correspondents, just wherever I could find the varieties I wanted, and without reference to the stocks on which they were growing. A few are on Americana stocks, several are on peach roots (of all things), and probably a majority are growing on the usual Myrobalan roots. These trees are planted two feet apart in the row and are tied up to a trellis of chicken wire. There are about thirty varieties in the row, numbering most of the different botanical types more frequently cultivated in North America. Many of the varieties are totally and very obviously unsuited to this method of treatment, and presently I will replace them with more amenable varieties. But many of the varieties have fruited, especially the Japanese kinds, and some of them, like Burbank, have proved most unexpectedly docile. Altogether this row of unsuitably propagated and unsuitably selected varieties of plum trees has been one of the most interesting, instructive and entertaining elements in my dwarf fruit garden.

Next there comes a trellis bearing some espaliers, including plums, pears, apples, peaches and cherries; but these have been recently planted, and as yet they have done nothing worth relating.

There is one row of twenty-three dwarf pears, mostly trained in pyramid form. These have not done well, but the reason is not far to seek. The soil is light and full of gravel, and quite unsuited to pear or quince. Pears never thrive on it. Several of the trees are bearing a crop this year, but some of the trees are also dead, and the whole row looks like the finish of a bargain sale on the remnant ribbon counter.

The row of upright cordon pears is a trifle better, but that is only an accident, I think. The varieties which are growing there seem to be rather better adapted to withstand the unpropitious surroundings. These trees also are bearing.

When we come to the two rows of horizontal cordon apples, though, the real fun has begun. Nearly all these trees are in bearing, and a few of them have borne every year since they were planted out. They are set only three feet apart in the row, which is not enough; and they suffered terribly the first year from a midsummer attack of aphides; and the pruning was neglected to allow them to recover from that scourge, so that the form was somewhat injured; but they have never ceased to be a joy to me and a wonderment to visitors. They are mostly of European varieties, but Bismarck is the showiest and most fruitful one in the collection, though far from the best to eat.

Then there are standard gooseberries and currants, of which there is little to be said. They haven't been there long, but they are at home and are going to stay. Next year I am going to put in some gooseberries and currants in espalier form.

FIG. 43—DWARF PEAR IN PYRAMID FORM

Two years planted; author's garden

Very few persons know what a medlar is. For the benefit of the ignorant and to increase the kaleidoscopic effect on my fruit garden, I have some medlar trees,—Holländische Monströse,—which I bought of Louis Späth, Baumschulenweg, Berlin.

A wire trellis, built much like a grape trellis, only higher, carries the row of upright cordon apples. Some of these bore fruit the first year they were planted, and there has been a fair sprinkling of fruit every year since then. This has been one of the most satisfactory lots in the make-up.

There are two rows containing forty-six bush-form apples on paradise roots set six feet apart. Some of these have borne every year since planting out, many of them showing a good crop this year. Again Bismarck is the most fruitful, but the least pleasing to eat. Alexander has made a good record, and this year Calville d'Automne shows a very pretty crop. It is customary with visitors, especially those already interested in fruit-growing and those of a practical turn of mind, to depart with the judgment that "all those other schemes are curious and interesting, but the bush form apple trees look the most like business." I think so too. In fact my experience with dwarf apples might be summarized by saying, "bush trees for business, cordons for fun."

One row of peach trees on St. Julien plum roots set fruit buds in abundance the first year, but they were killed by the freeze of the following winter. The second year the experience was the same, except that the tops froze with the fruit buds. New tops were grown at once, however, and the following year nearly every tree bore a small crop of fruit. Dwarf peach trees are worth while.

This garden has also a row of cherry trees, including Morello, Richmond and Montmorency; but these trees were set the second year of the garden making and have borne only a small crop of sample cherries.

The last planting in this garden consists of one row of nectarines, twenty-two trees.

This little garden, containing considerably less than a quarter of an acre of land, has now growing upon it 548 fruit trees of the kinds named. And I am not yet done planting. There are various other things that I want to put in,—quinces, apricots, and perhaps raspberries, dewberries, and other bush fruits. In fact, I should like to make it a "Paradise" like good old Gerarde's or Dodoens', in which all the fruits "good for food or physic" might be brought together and represented in a little space.

It would be quite wrong to close this experience meeting without giving the observations and quoting the opinions of some other and better men. Patrick Barry, in his delightful "Fruit Garden," recorded his belief that dwarf fruit trees were well worth while. "The apple," said he, "worked on the Paradise, makes a beautiful little dwarf bush. We know of nothing more interesting in the fruit garden than a row or little square of these miniature fruit trees. They begin to bear the third year from the bud, and the same variety is always larger and finer on them than on standards." Speaking of pears, he said: "On the quince stock the trees bear much earlier, are more prolific, more manageable, and consequently preferable for small gardens."

The late Mr. E. G. Lodeman, who wrote the most comprehensive American monograph on dwarf apples, concluded his essay rather pessimistically in these words: "From all the evidence which I have been able to collect, therefore, I cannot advise the planting of dwarf apple trees for commercial rewards, but it seems to me, nevertheless, that they are worth experimenting with for this purpose." Mr. Lodeman recorded and endorsed the common opinion "that apples grown on dwarf trees are handsomer and of better quality than those grown upon standards"; but he did not seem to consider that fact of much importance.

Those who are acquainted at the Lazy Club in Cornell University, and especially those who know Bailiwick, have heard of Professor L. H. Bailey's dwarf apples. (Fig. 44.) These were planted six or eight years ago, and most of them are now in bearing. There are a good many different varieties, nearly all French. My understanding of the scheme is that it was as much as half intended to be a commercial venture; but up to the present time little else but confusion and fun have been gathered with the fruit from those dwarf apple trees. When last I asked the proprietor for his experience with dwarf apples he said that he was having a lot of experience, only he didn't know what it was.