It is perhaps when the work of clipping and training the trees begins, that the most difficult part of the practical management of a Topiary garden is experienced; but as in this chapter I intend to deal only with old trees, I will leave the training and shaping of young trees to be described in another chapter.

It is a matter that requires both skill and experience, both on the part of the man who is handling the shears, and of the gardener who is superintending, and who is also responsible for the work. There is nothing which looks worse in a garden than trees not properly clipped, and no clipped work can be called properly done if all or even any shear marks are visible to the eye. Clipping and training of trees in a Topiary garden is work that should either be done properly or else not at all. If the greatest possible amount of care is not bestowed on the trees, they will very soon grow out of shape, and, of course, become unsightly; and nothing is wanted in a garden that is not pleasing to the eye.

If the garden is a very extensive one and contains a large number of old specimen trees, the work of clipping them and cleaning up afterwards is an undertaking that requires a great deal of time and labour, as the work is not of a nature that will allow men to hurry over it, and it is moreover a labour of skill and patience.

In an old Formal Garden, where Topiary work is considered the principal feature, it is advisable to allow only men who are thoroughly experienced in the work to do the clipping. In fact, if the shape and symmetrical appearance of the trees are to be kept as nearly as possible perfect, experienced men are necessary. Of course, in any garden it will sometimes happen that the gardener may have to put a novice to do some part of the clipping, as fortunate indeed is the gardener in charge of a Topiary garden who can rely year after year on three or four men who are thoroughly trained and accustomed to the art of Topiary clipping. When it is found necessary to employ a person to do any part of the clipping who has not had any previous experience, he should only be allowed to begin on trees of the least importance, and those most concealed from view. The beginner will always find that a round or oval shaped tree is a great deal less difficult to work upon than a square one, or a hedge. Therefore, if possible, he should be allowed to get his hand in on round trees. It is always a wise plan when a novice is learning the work, to have a thoroughly experienced person working close at hand—but not on the same tree—to assist him and see that as few mistakes as possible are made. No hard and fast line can be drawn as to the exact date when the clipping season should begin, but it should be as soon as possible after the trees have completed their growth, as at that season the young shoots are soft, and not so difficult to clip. In any case it should not be later than the middle of September, especially if there is a large amount of clipping to be done. If it can be found convenient to start a fortnight or three weeks earlier, so much the better. More especially does this apply to beech or horn-beam, as they finish their growth sooner than the yew, and if they are not clipped immediately, the young shoots get hard and, of course, are more difficult to manage. Where there is enough clipping to keep three or four men at work for nine or ten weeks, the sooner the work is commenced after September comes in the better, as it enables the work to be got through before the severe frosts of winter set in. When the trees are of a large size—a thing that is generally the case in old gardens—scaffolding of some sort will be necessary, and for this purpose there is nothing better than trestles made to close up into as little space as possible, for the double purpose of storing them away in winter or at any time they are not required for use, and for the sake of convenience in carrying them about the garden. The trestles should be made in at least three different sizes, two of each size, or more if necessary. These, with the aid of a single plank laid across two equal sized trestles, will generally suffice for the work. Of course, the plank that is used must be strong enough to carry a man, and wide enough to give him plenty of standing room.

If the trees are old and practically perfected in shape, the work of clipping is not such a difficult matter as when the trees are in course of training. But it is usually the case that although many of the trees are old there are young ones coming on that have to be shaped. In the case of old trees, as a general rule, all that is required is to take off the year’s growth; clipping back to the old growth of the previous year.

Hard clipping of old trees is a practice that should to a certain extent be carried out, unless it is desired to enlarge the size of the tree. If this is the case, from one inch and a half to two inches of the year’s growth should be left on, but not more.

Altering the shape of old trees is a thing that should be avoided as far as possible, especially if the trees are well shaped and in a healthy condition. It sometimes happens that one or more trees in the garden may have been allowed through careless management or some other cause to grow out of shape; or perhaps an old tree may be obscuring the view in some way or other. In the case of such a thing happening, it will be necessary to use the pruning knife or saw rather severely, both of which can be used with perfect safety when they are in the hands of a person who thoroughly understands the yew; provided, of course, he does not go to extremes, the yew is a tree that will stand a fair amount of rough treatment, and one that can be twisted and cut into almost any shape desired.

I have seen old specimen trees that had grown out of shape, or were, perhaps, shutting out the view in some part of the garden, taken down and re-trained, or cut down with the pruning saw, or knife, as the case might be; and yet in a very few years they had quite recovered and grown into nice, well shaped trees, full of vigour and well furnished with young growth. Rather will the tree, if it is carefully managed, be improved by the severe pruning it has been subjected to.

Of course, after an operation like the one I am describing, great care will have to be taken that every use is made of the young growth, as the main object to be kept in view is to get the tree well furnished again in as little time as possible. There will be very little, if any need for using the shears the first year after the cutting back has been done; but if the young growth is at all rank, it should be carefully thinned with an ordinary pruning knife, always taking care that only the weaker shoots are removed, leaving the stronger ones to grow for use another year, when they can be tied in and cover up, as far as possible, the old and bare wood. When tying young shoots, tarred string will be found most suitable. It answers the purpose very well and it is easier to tie than wire, although it has a tendency to decay quickly through being always exposed to the weather. In the case of young shoots the pressure is not great and string will generally last as long as the tie is required, as the shoots soon become matted and interwoven together; but if a strong branch should happen to get displaced in any way, the use of string as a tying material should be avoided and copper wire should always be substituted in its place. In the case of an old branch the pressure is greater, and whatever material has been used in the work, it will as a rule be intended to last for years. For the purpose of tree tying of any description copper wire is to be recommended; it has not the same injurious effect on the trees as ordinary galvanised wire; but whatever is used, cork should always be placed between the wire and the wood as a preventive against cutting the tree.

When clipping an old tree that is a perfectly square one, it is a good practice to use either a line or some kind of straight edge. If the man who is doing the work uses one or the other he can generally give the tree a better and more finished appearance than if he trusts to the eye only.

Perhaps of all the different kind of shapes there are to clip in the Topiary garden, hedges require the most skill and care, and only the most experienced men should be allowed to undertake the work of clipping them. Hedges in the garden are mostly planted in such a way that their entire length is visible, and of course the most casual observer can see at a glance whether they are properly clipped or if there are any shear marks visible on them. If the hedge is composed mostly of curves, then of course the clipping is not such a difficult matter. A long, straight hedge and one that is almost entirely made up of curves, differ in the same respect with regard to the ease with which they can be clipped, exactly in the same way as a round or an oval tree. When clipping a straight hedge a person should never trust entirely to the eye, and lines should always be used; and for the purpose nothing is better than ordinary garden lines.

In the case of hedges that are cut into battlements at the top, these should have a line stretched lengthways along the ground, another along the base of the battlements, and another along the top of the battlements; and whatever size and width the battlements are, say, for instance, two feet high and two feet in width between them, a stick cut exactly two feet in length or a two-foot rule should be used to measure the exact height and distance between the battlements; and if those precautions are taken, any person with a fair knowledge of the art of clipping can hardly with ordinary care and attention get wrong; as, after all, the work of clipping Topiary trees is not so difficult as might be expected.

There are several points that should always be remembered. Symmetry and shape are necessary to make a good tree; and this may be said to be the first and most important factor in the work. Another point is to take particular care that the shears do not cut off more than is necessary. By that I mean, never to allow the shears to cut deep enough into the tree to make a hole. Another very important point to aim at is to give the tree as smooth and even an appearance as possible after the work is finished. I am perfectly aware that, in a large collection of yews or other clipped trees, there are always some that it is impossible to clip properly, on account of weak growth, or some other cause. For instance, trees that are growing in a part of the garden where they are fully exposed to wind and storm are almost certain to get into an unhealthy condition. The growth becomes weak and stunted, or perhaps the branches get worked out of place, or even die out altogether. In the case of trees of that description, no matter how much tying is done or how carefully they are clipped, they can never be made to have the same appearance as those that are full of young growth and are in a healthy and vigorous state.

Where the garden has been planted with mixed trees—such as yew, holly, boxwood and horn-beam, the clipping should all be done in the autumn so as to give the garden a tidy and uniform appearance. Autumn is not generally considered the right season of the year for holly clipping, but if there are some, more or less, planted among the yews in the Topiary garden, it is necessary that they should be clipped at the same time as the other subjects, for the sake of appearance. But if hollies are planted by themselves in some isolated part of the garden, whether in hedges or bushes, the work of clipping them should be carried out towards the latter end of May or beginning of June; then hard clipping every other year will suffice for them. At Levens we clip the holly hedges which are not actually in the Topiary garden hard back to the old wood every alternate year, and other years we merely go over them with a pair of shears and cut away the long shoots. I am rather of the opinion that hard clipping of hollies every year is more injurious than beneficial to the trees.

It is evident to anyone who has seen an old Dutch or Topiary garden, that, in the formation and laying out of the grounds, boxwood has always been considered one of the principal features, and in most of them it remains so to this day.

Where box succeeds well and remains in perfect health, no care or attention should be spared to keep it so, for there is no edging that can be used in the garden to be compared with it for beauty. It has, however, some drawbacks, the principal one of which is the excellent accommodation it affords to snails and other garden pests; but its advantages more than counterbalance its defects. Like the hollies, every other year is sufficient for clipping it, and there is no more suitable month for the work than June. There should be no clipping done to boxwood until all danger of frost is gone, as it is extremely dangerous to clip before that period has passed. There is nothing more injurious to newly clipped boxwood than sharp frosts. I have seen boxwood that was over a hundred years old clipped in April, with the result that a few sharp frosty nights killed the whole of it.

Excepting during the clipping season, there is very little work to be done to the trees in a Topiary garden, unless it is top-dressing them with some sort of manure, or keeping a look-out for branches that have become loose through wind or some other cause. If this occurs, the branches should be immediately tied back into their places before any injury takes place to the tree.

There is another danger that should be strictly guarded against in winter, and that is, the danger the trees undergo in the event of heavy falls of snow. When the trees are old and large and in every way adapted for carrying a heavy weight of snow, no time should be lost in getting it removed as quickly as possible; the sooner the men get to work the better, even before the snow has ceased if it is at all likely to be a heavy fall. The labour of having to go over the trees two or three times must not be considered if they are to be saved from injury. It is much better to keep constantly knocking the snow off with light switches, than take the risk of having the trees crushed out of shape and broken.