Proper pruning techniques: 13 steps to help your tree become healthier and more beautiful.

Pruning not only keeps your garden tidy but also promotes healthy plant growth, beautiful foliage, and reduces pests and diseases. Many people want to prune their plants themselves but worry about damaging them by cutting incorrectly. This article will guide you on how to prune correctly , easily applicable even for beginners. By understanding a few basic principles, you'll know when to prune, which branches to cut, and how to do it safely so your plants recover quickly and thrive.

Simple and technically correct ways to shape a tree.

1. Prune away tangled and heavy branches first.

• Remove any branches that are growing too close together, crossing each other, or overlapping to allow for better air circulation.

• Trim back long, heavy branches that can easily cause the trunk to lean or branches to break.

• This allows more sunlight to reach the canopy and reduces pests and diseases.

2. Create an overall shape resembling a pyramid.

• With a single, standing tree, you can prune it into a gradually tapering shape from bottom to top.

• The lower branches should be kept longer, while the upper branches gradually shorten to create a balanced canopy and a strong base.

• This is a common pruning technique that helps trees stay healthy and look naturally beautiful.

3. For hedges, you can trim them more aggressively.

• Trim evenly on both sides to create a flat, clean, and uniform surface.

• Always keep the base wider than the top to allow even light distribution, helping to create a dense green hedge.

4. Avoid excessive pruning.

• Trim the plant to a maximum of about 1/8 to 1/10 of its total height.

• Excessive pruning can weaken the tree, reduce its growth rate, and create an unbalanced canopy.

• If you need to reduce the height, trim in stages throughout the year instead of cutting it drastically all at once.

Part 1: How to identify branches that need pruning for a healthy tree.

Step 1: Define your goals before pruning the tree.

1. Understand why you want to trim your hair.

• Do you need shade or do you want the tree to grow taller?

• Has the tree been pruned recently, and what is the current condition of its canopy?

• Clearly defining your goals will help you choose the right pruning method and avoid damaging the tree.

2. The goals directly influence the timing of pruning.

• You can lightly prune or remove dry or dead branches at any time.

• If you want to prune, increase height, or address more significant issues, plan seasonally to allow the plant to recover better.

3. Understand the impact of each season on pruning.

• Pruning in winter often encourages vigorous growth in spring, which is ideal if you want your plant to develop many new branches and leaves.

• Pruning in the summer helps slow the growth rate of the pruned branches, which is suitable when you want to shape the canopy or limit the growth of unwanted branches.

Step 2: Observe the overall appearance before trimming.

1. Assess the current size and shape of the tree.

• Take a few minutes to observe the entire trunk, canopy, and the direction of branch growth.

• Identify where the tree is unbalanced: uneven canopy, branches growing diagonally, branches that are too long, or the top part of the tree that is too dense.

2. Visualize the shape of the tree after completion.

• Imagine the shape you want to achieve: a round canopy, a pyramidal shape, or an open shape to let in light.

• Visualizing beforehand helps you know which branches to keep, which to cut, and avoid over-cutting.

3. Remember the core principles.

• Only prune branches that affect the tree's airflow, health, and aesthetics.

• Focus on the tree pruning goals you've defined beforehand to ensure each cut has a clear purpose.

Step 3: Identify the main branches that form the framework of the tree.

1. Find the large branches that form the "skeleton" of the tree.

• These are large, strong branches that originate directly from the main trunk.

• They determine the shape, stability, and long-term growth direction of the tree.

• Usually, there are only a few main branches, evenly distributed around the trunk.

2. Do not cut off the main branches.

• Removing large branches can unbalance the tree, weaken its roots, and significantly slow its recovery.

• Only prune lightly at the tips of branches to shape them; absolutely avoid cutting too close to the base.

3. Focus pruning on the side branches.

• Once you have clearly identified the framework, you should only deal with small, intertwined, cross-branched, or misaligned branches.

• This method helps maintain the plant's shape and ensures its overall health.

Step 4: Remove damaged branches first.

1. Clearly identify any broken, cracked, or weakened branches.

• Observe any branches that have been broken, bent, or cracked by the storm.

• Also, check for branches that are dry, discolored, or no longer have healthy leaves.

2. Cut them off immediately to prevent the plant from losing strength.

• Damaged branches still consume water and nutrients, causing the healthy parts to grow more slowly.

• Early removal allows resources to be focused on the healthy branches.

3. Cut at the right spot to help the plant recover quickly.

• Cut close to the point where the branch is still healthy, but avoid cutting into the main trunk.

• Use a sharp knife/scissors to make clean cuts and reduce the risk of fungal infections.

Step 5: Thin out areas with too many branches.

1. Remove any intersecting or overlapping branches.

• These branches easily rub against each other, causing abrasions and creating weak points for pests and diseases.

• When pruned, the tree canopy becomes more open and the risk of mold is reduced.

2. Open the canopy to allow for better light and air circulation.

• Maintain a reasonable distance between the branches so that sunlight can reach all sides.

• Good air circulation helps limit fungal diseases and reduces the attraction of insects.

• This is an important principle in pruning trees to ensure their long-term health.

3. Remove branches that are growing inwards.

• Branches growing towards the center of the tree create a tangled canopy, reducing sunlight and making it prone to moisture buildup.

• Keeping the branches that grow outwards helps to create a balanced shape for the tree and promotes stronger growth.

4. Prioritize pruning smaller branches first, avoiding disturbing the main branches.

• Only trim the side branches that are disrupting the canopy.

• This method both preserves the natural shape of the plant and helps it recover quickly after pruning.

Step 6: Trim any branches that are getting in the way.

1. Immediately remove any branches that are affecting daily life.

• Low branches block pathways, obstruct visibility, or get in the way of movement.

• Tall branches reach close to power lines, touching the roof or sweeping onto balconies.

• These branches not only cause inconvenience but also pose a potential safety risk.

2. Trim the hair properly to prevent regrowth.

• Cut close to the point where it meets the healthy branch, but avoid cutting into the main trunk.

• The tools must be sharp to ensure clean cuts, which helps the plant heal quickly and reduces the risk of fungal diseases.

3. Preserve the natural shape of the tree.

• Only trim the obstructing parts; do not cut too deeply, as this will disrupt the balance of the canopy.

• Monitor the area for a few weeks and make further adjustments if the plant continues to grow into the obstructed area.

Step 7: Prune the branches to shape the tree.

1. Identify the branches that are making the tree look unbalanced.

• Look for branches that extend too far out, grow in the wrong direction, or give the impression that the tree canopy is distorted.

• These are typically secondary branches that lie outside the main outline of the canopy.

2. Trim off any protruding branches.

• Simply trimming a few misplaced branches will make the tree look neater and more evenly rounded.

• Prioritize pruning at the tips of branches to shape the tree without affecting its vitality.

3. Preserve the natural contours of the tree canopy.

• There's no need to trim too much; the goal is to smooth out any excess material.

• Each cut should be purposeful, based on the shape you want to achieve.

4. Monitor and make gradual adjustments.

• After pruning, observe the plant for a few weeks to see the direction of growth of the new shoots.

• If the plant starts growing crooked again, you can prune it lightly the next time to stabilize its shape.

Step 8: Prune minimally to protect the plant's health.

1. Limit the number of cuts.

• Each cut weakens the tree's natural defense system.

• The more you cut, the higher the risk of fungal diseases and insect infestation.

• Only prune when absolutely necessary and avoid removing more than 25% of the total number of branches in a single pruning session.

2. Keep most of the living branches on the tree.

• For deciduous trees, ensure that at least two-thirds of the tree's height remains supported by healthy branches.

• A bare trunk is not capable of sustaining the tree; removing too many branches causes severe stress and slows its recovery.

• Depending on the type of tree, the percentage of branches to keep may vary, but the general principle is to always prioritize retaining living branches.

3. Avoid excessive pruning multiple times in one season.

• After each pruning, the tree needs time to heal the wounds and stabilize its growth system.

• Unless a storm breaks a branch, you shouldn't do more than one heavy pruning in the same season.

• Pruning too frequently can weaken the plant and reduce its resistance to disease.

Part 2: How to prune trees correctly to minimize damage

Step 1: The best time to start pruning trees

1. Prune plants during their dormant period to reduce stress on them.

• The ideal time is from late autumn to early winter, when the trees have shed their leaves.

• At this stage, the tree almost stops metabolizing, so pruning will limit sap leakage and reduce loss of vitality.

• Fungal diseases and insects are also less active, and cuts are less likely to become infected.

2. Recognizing when a plant has entered dormancy.

• Once all the leaves have fallen, the tree enters a dormant state until early spring.

• This is a clear sign that allows you to begin the steps of pruning the tree safely and effectively.

3. Immediately remove broken branches caused by storms, even outside of the proper season.

• If a storm breaks a branch, you can cut it off immediately without waiting until winter.

• Early treatment helps limit rainwater, fungal diseases, and insects from entering the fracture.

4. The benefits of choosing the right time

• The tree recovers more quickly in the spring.

• Minimize the risk of infection as much as possible.

• The shape of the tree is easy to observe because it is not obscured by the foliage.

Step 2: Cut using the correct technique to avoid damaging the tree trunk.

1. Make the first cut on the underside of the branch.

• This is an initial cut, not a full cut through the branch.

• The purpose is to prevent the branch from splitting back into the trunk when the weight pulls it down as it falls.

• The cut below helps control the direction of breakage and protects the trunk of the tree.

2. Cut precisely outside the "neck of the branch".

• The branch collar is a small, bark-like ridge where a branch joins the trunk.

• The cut must be made on the outside of the collarbone, never too close to the body.

• Keeping the collar in place helps the plant heal faster and reduces the risk of fungal disease.

3. Why not cut close to the trunk?

• Cutting too close to the trunk removes the natural protective layer, resulting in a larger wound and slower healing.

• Properly placed cuts will close better, resulting in a healthier and safer plant in the long run.

Step 3: Cut the branches in the correct order to ensure the safety of the tree trunk.

1. Make a second cut outside the lower cut.

• Cut a few centimeters from the stem, outside the first cut you made on the underside.

• This pruning will cut off the entire branch and allow the remaining part to fall without tearing the bark.

• This step helps to safely remove the heavy part of the branch.

2. Remove any fallen branches to avoid obstructing the work.

• After the branch is detached from the trunk, clean it up immediately to ensure a clean and safe workspace.

• At this point, only a short section of branch (stub) remains on the tree for you to continue processing using the correct technique.

3. Prepare for the final step of cutting.

• Keeping the branch short allows you to easily control the final cut and avoid damaging the main trunk.

• The final pruning will be done later, precisely outside the collar of the branch to allow the tree to heal quickly on its own.

Step 4: Finish the cuts to help the tree heal quickly.

1. Make the final cut to remove the remaining branch.

• After the heavy parts of the branch have been removed, you simply need to cut off the remaining short stub.

• This cut should be made just outside the collar of the branch but without touching it.

• This is an important cut that helps the tree heal quickly and cleanly.

2. Keep the branch collar in place.

• The branch collar (the small ridge where a branch joins the trunk) is a natural layer of tissue that helps the tree seal wounds.

• Do not cut straight into the body or cut off the collar.

• If the necklace is cut, the wound will be larger, heal more slowly, and be more susceptible to fungal infection.

3. Ensure the cut is clean and precise.

• Use a sharp tool to make a smooth saw cut, leaving no loose threads.

• Proper pruning helps the tree recover faster and reduces the risk of disease during the rainy or humid season.

Step 5: Clean the pruning tools to prevent the spread of disease.

1. Clean the instruments after cutting parts suspected of being diseased.

• If you have to cut into a wart, fungal infection, or part of the body showing signs of disease, disinfect immediately after each cut.

• You can use medical alcohol, a 1% diluted bleach solution, or common household detergents.

• Disinfecting after each cut helps limit the spread of pathogens to other parts of the plant.

2. Clean the tools after you have finished pruning healthy trees.

• Even if the plant is disease-free, you should still wipe the pruning shears with a cloth dampened with disinfectant after you've finished pruning.

• This helps remove tree sap, dirt, and bacteria that may be clinging to the blade.

3. Disinfect thoroughly before transferring to another plant.

• Dirty tools can carry pathogens from one plant to another, especially in gardens with many different types of plants.

• Wipe or dip the knife blade in disinfectant solution before cutting the next plant to ensure safety.

4. Why is cleaning tools important?

• Clean tools ensure smooth cuts, preventing damage to the plant tissue.

• Reduces the risk of fungal and bacterial infections entering through cuts.

• Proper tool maintenance also helps scissors last longer and makes cutting safer.

Important notes on proper tree pruning techniques.

1. Determine the appropriate time for pruning each type of tree.

• Each climate zone and each type of tree has its own optimal time for pruning.

• Please consult reliable sources such as agricultural extension centers or local gardening resources.

• Dead wood, dry branches, or wilting branches can be cut at any time.

2. Choose the right tool according to the branch size.

• Small branches: use pruning shears.

• For medium-sized branches (over 2.5 cm): use large pruning shears (anvil or bypass).

• Large branches (over 5–7 cm): use a tree saw to cut them.

• Do not use hedge shears to trim woody plants — this can easily crush tissue and damage the plant.

3. Disinfect instruments regularly to prevent the spread of disease.

• Carry a bottle of isopropyl alcohol or cleaning solution in a sealed container that won't easily spill.

• Dip the blades of the pruning shears/saw after cutting each tree, especially in densely planted gardens or orchards.

• Regular cleaning helps reduce the risk of carrying pathogens from one plant to another.

4. Pruning conifers requires extreme caution.

• Coniferous trees only sprout new shoots from the green parts of the wood.

• If you prune too deeply, exposing the brown wood without green leaves, the tree will not regrow in that area.

• When creating a hedge with conifers, only trim the green parts to maintain the shape and ensure the plant continues to grow.

5. Never cut down shade trees.

• Do not topping shade trees to reduce their height — this weakens the branch structure, making them prone to breakage and reducing the tree's lifespan.

• If you need a shorter plant, choose a suitable variety from the start instead of trying to force it to grow by pruning the top.

6. Always ensure safety when trimming.

• Wear long-sleeved shirts to avoid scratches.

• Wear protective gloves when handling scissors and saws.

• Wear safety glasses to prevent sawdust, wood chips, or leaves from flying into your eyes.

• Ensure you are standing firmly and do not cut while in a dangerous position or under branches that could fall.

References

1. https://www.arborday.org/tree-care-maintenance
2. https://www.rhs.org.uk/plants/types/trees/pruning-guide
3. https://www.treesaregood.org/treeowner/pruningyourtrees
4. https://extension.umn.edu/planting-and-growing-guides/pruning-trees-and-shrubs
5. https://extension.umd.edu/resource/pruning-trees-home-landscape/
6. https://extension.usu.edu/forestry/trees-cities-towns/tree-care/pruning-powerlines
7. https://www.greening.gov.hk/filemanager/greening/en/content_28/Guidelines_on_Tree_Pruning.pdf
8. https://www.portland.gov/trees/tree-care-and-resources/how-prune-properly
9. https://yardandgarden.extension.iastate.edu/faq/how-do-i-sanitize-my-pruning-shears

Translated by: Lesley Collins Tran .