Tree Pruning — Pruning Your Trees
If you have just entered the tree growing world, you have no doubt heard the term “pruning” tossed around by the more veteran growers. Well, I have something to admit. For several years, I did not know much about how to do it. I heard the term a lot, but I never felt comfortable asking someone what exactly it was. Even though it would have benefited my gardening and tree growing, I was too prideful to ask. I’ve found that pride is the reason for the failure of many great endeavors; if I had just asked someone more about pruning, I wouldn’t have undergone a few of the disasters that occurred during my first years of gardening.
The Purpose of Tree Pruning
Pruning is the removal of dead or unneeded branches to encourage the growth of flowers. Usually a tree will end up devoting energy to branches that don’t need it, while neglecting branches which are bearing more fruit. If you remove the branches that are taking all the nutrients, you will begin to see a flourish in the other ones. Pruning also keeps the tree in shape by keeping the branches even. This prevents it from becoming weighed down on one side. Having too many branches on one side could cause the tree to become permanently crooked.
Many gardeners don’t even think about pruning their trees until they start to bear fruit. This is a big mistake, and you should never neglect to care for a tree just because it hasn’t yet begun to produce. During the entire process of growth, you should prune the tree in a way that it is even and uniform. Then, when it does start to produce fruit, the results will be significantly greater. It is very easy to tell the difference between a tree that has been pruned regularly during its growth, and one that has been neglected. Generally the shape of the tree is much more natural looking if it has been pruned.
Cut Off the Dead Wood
The first thing to look for when you start pruning is any branches which are dead or diseased. These are quite easy to recognize. Usually they don’t bear any fruit, and might be misshapen or discolored. Don’t hesitate at all in chopping these guys off, as they are nothing but detrimental to the health of your tree. Sometimes a branch can be dead or diseased without making it too obvious. If this is the case, simply wait until the tree is flowering and it will become obvious by not growing anything.
The second type of branch to look for is the branch that is too close in range to all the other ones. If it grows at such a length and angle that the end is right next to all the other branches, they might end up crowding each other out. Take off the smaller of the two branches to allow the larger one to have the breathing room that it needs. This same rule applies to the weight balance of your tree. Sometimes, for reasons we will never understand, a tree will grow several branches on one side and weigh itself into being lopsided.
Photo: M.D. Vaden of Oregon. Image used by Arborist Mario Vaden to teach pruning at garden seminars. Shows 5 cuts made on an apple tree sprout over a two year period to produce fruit spurs. Flowers and fruit occurred during this sprout's 3 year.
Training Branches to go where You Want
Many people associate pruning with changing the structure of your tree to fit a different shape or style. However, this is not the case. Altering the structure of the tree is known as “Tree Training”. This is a much better way to develop an alternate form for your tree. Pruning should be used to prevent diseases, prevent lopsidedness, and encourage healthier fruit growth.
Pruning is also used to maintain the proper shape for the tree. For example, if you have an abundance of branches on one particular side of the tree, then you will use pruning to get rid of the larger segments which weigh down the tree to one side. Think about it more in terms of maintaining rather than altering. While pruning is useful occasionally, most of the time you can use training as a healthier and more efficient alternative.
Training has not been around for very long. Through tying down branches or propping them up from the ground, one can direct the growth of the tree to take whatever shape they want. This theory is usually used in the early days of the tree to encourage it to develop fully. If you direct the tree and get it started off on the right foot, you’ll save yourself a lot of pruning time later.
Usually, training occurs during the summer. Rather than just cut off all the branches that aren’t going in the right way, you try to redirect them. The mechanisms you use can be thought of as orthodontic braces for your fruit tree. They pull or push the branches, like teeth, in whatever direction you want them to go. Eventually they naturally grow that way due to your training.
It can be hard to decide how exactly to train your tree. There are many different forms and shapes to choose from. Some are meant to allow a high density of trees in one orchard, and some are meant to provide maximum fruit bearing per tree. Depending on where your tree is and how you want it to function, you will have to look for different types of forms that will perfectly fit your situation.
The theories of training can also be applied even if you are growing a tree in the traditional (natural) form. Sometimes branches will grow too close together and block each other out, so training them to grow away from each other can prevent the need to prune them later. This is highly beneficial even if you are just growing a tree in your backyard, in a non professional environment.
To train a tree, you will need some sort of outside brace to push or pull a branch. Alternately, if you want to push 2 branches closer together or further apart, you can place something in between them or lash them together with rope. Successfully training your branches just takes a little imagination in deciding what to tie things to and what to push things off of. I have found that stakes, fences, or simply an upright two by four leaning away can work wonders.
There is no tree grower that couldn’t benefit from using a little training in their tree growing escapades. Whether you have decided to give your trees a completely new form, or just optimize the branch placement for healthier fruit, there is surely some way that training can benefit you.
Shaping Trees for Different Situations
Through the use of pruning techniques, it is possible to shape your tree to a certain style. There are seven main tree shapes that all have their own benefits for certain situations. During the growth of the tree, simply cut off the unneeded branches, tie the wanted branches into the proper shape, and you will be able to shape it however you want. However, for some of the more advanced shapes, equally advanced pruning techniques are required. There are many books written on this subject.
Usually, if you’re trying to get your tree to a certain shape, all the tying and pruning should occur in the fall. This will encourage the shape to stick, since no fruits will be produced at that point in time. Each of the different shapes is very useful in certain situations. So, here are some different types of shapes you are able to choose from.
Standard trees hardly need any explanation. These are the varieties that are most common, and probably what you picture when you think of any tree. No specific shaping is required to get the shape to take this form. Just let it go and prune it as you would normally, and unless you have a strangely deformed tree then it should end up being a standard tree.
It is possible to turn a standard tree into a bush tree through pruning. The branches take the same shape, but the stem or trunk of the tree is noticeably shorter. This can be beneficial if you want to grow trees, but don’t want to block the view. For example, my house has a great view of the Rocky Mountains. I didn’t want to sacrifice this gorgeous view, so I grew my trees up as bush trees.
Cordons are a type of tree that you might not be familiar with. It consists of one stem with no branches. It is planted at an angle so that it arches up over the ground. Through the course of its growth, all branches are removed. These are beneficial because they take up very small amounts of space and more can be fit in a certain square footage. The only negative aspect is that they produce smaller amounts of fruit per tree.
Espalier trees grow with a single vertical stem in the center, and several horizontal branches on each side. These allow for long rows of trees, while still producing large amounts of fruit. If you operate an orchard, you probably use this shape to fit as many trees as possible into the area you have.
Fan trees use the same theory as espalier trees. However, the shape is slightly different. The same central vertical stem is used, but the connected branches are not horizontal; they grow in the same pattern as a standard tree, only they are two dimensional rather than three dimensional. They are also used to save space, and are used instead of espalier trees for certain types of trees that do better with sloped branches.
Another type of espalier is the step-over espalier. They are like a normal espalier, but with just one horizontal branch very close to the ground. They are particularly interesting because they still produce delicious fruit while providing a border for whatever you want. I have used step-over trees to fence of my garden. They are definitely my favorite shape of tree, mainly because they are like a fence that bears fruit. What’s not to love?
As you can see, each of these shapes has its own benefits and negative aspects as well. If any of these sounds like they would be a good fit for your garden, you can ask your local nursery employees for advice on reading material that will help you achieve your goals. Most of the time, getting the tree into the desired shape is a very easy process and just requires some guidance at the beginning.
So hopefully I have provided you with a basic knowledge of pruning. There are more situations and types of branches that require pruning, but what I’ve outlined is the very basic parts. These can alter depending on how old your tree is. For example, for the first 3 years of a tree’s growth it requires pruning that follows more “formative” guidelines. After the tree is well established, you will need to use “regulatory” pruning to keep it where you would like it to be. There are entire books written on how to prune trees depending on how old they are. There are far too many techniques for me to go over, so if you want to use these advanced techniques then you should go to your local library and check out a book.
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