In gardening and landscaping, there comes a time when it is necessary to move or transplant trees To improve aesthetics, solve space problems, ensure the survival of species, or simply renew the landscape of a garden or orchard. This process, although common, requires technical knowledge, proper tools, and specific steps to ensure success and minimize stress and damage to the plant. how and when to transplant trees It is essential for them to take root correctly and continue growing healthy and vigorously in their new location.
In this article, you'll find up-to-date and detailed information on tree transplanting: key factors affecting the operation, the best time and conditions, necessary tools, specific steps for trees of different sizes and species, considerations based on root type, soil preparation, post-transplant care, and expert advice based on professional and scientific experience.
Why and when is it necessary to transplant a tree?
Transplanting involves removing a tree from its original location and planting it elsewhere. This practice may be necessary for several reasons:
- The tree has grown too large and takes up more space than is available, interfering with buildings, trails or infrastructure.
- Lack of foresight on the adult size of the species at the time of planting.
- The original location does not offer the right conditions of light, drainage or nutrients.
- Need to relocate due to construction, landscaping, or garden redesign.
- The shaft It was purchased in a nursery and must be planted at its final destination.
- Survival of the species in the face of environmental changes or soil problems.
On the other hand, there are trees that, due to their low cost and rapid growth, are not usually recommended for transplanting, such as willows, poplars, or mulberries. However, in most cases, especially if the tree has ornamental, heritage, or sentimental value, transplanting is a viable option as long as it is done correctly.
Key factors before transplanting trees
Before approaching the transplant, it is important to take into account several factors that determine the success of the operation:
- Size and age of the tree: Young and small trees (children under 2 meters and under 3 years of age) are easier to transplant and more likely to adapt. Mature, large trees or trees with a large root ball require more skill and often require machinery or professional advice.
- Health conditionIt's essential to ensure the tree is healthy. Avoid transplanting trees with dry branches, rotten trunks, or serious pests or diseases.
- Root typeSome species have shallow, tap, or highly branched roots. Some, such as conifers and oaks, are more sensitive to root cutting and require additional care.
- Time of the year: The time of transplant is determined by the biological cycle of the species, the climatic conditions and the soil temperature.
- Preparation of the destination landThe new location must meet optimal light, drainage, texture, and nutrient conditions for the tree to take root and grow.
- Tools and materials: : Shovels, pruning shears, burlap, a tutor, rope, mulch, water and, for large specimens, special machinery are required.
Essential tools and materials for transplantation
- Straight shovel and spoon: to excavate the root ball and the new hole.
- Pruning shears: to clean damaged roots and reduce the canopy if necessary.
- Burlap, sackcloth or mesh to wrap the root ball: prevents crumbling.
- Tape measure or tape measure: to measure the diameter of the trunk and calculate the size of the root ball.
- Mulch and compost (optional): to improve structure and maintain moisture.
- Humus (optional): adds organic matter to the substrate.
- Tutors and rope: to stabilize the transplanted tree.
- Water: essential for irrigation before, during and after the operation.
What is the best time to transplant trees?
Success depends largely on the timing of the operation. best time to transplant trees varies depending on the type of species and its life cycle:
- Trees of feeble leaves: the optimal period is from the end of autumn to the end of winter, when they have lost their leaves and are dormant. This prevents excessive water loss through transpiration and allows new roots to develop before spring sprouting.
- Evergreen trees: are usually transplanted to the end of winter or beginning of spring, avoiding frost and extreme temperatures. They are more sensitive because they keep their leaves year-round and do not completely interrupt their metabolic activity.
- Fruit speciesGenerally speaking, the same rule applies. It's recommended to transplant before bud break for deciduous species (pear, apple, cherry) and, for perennial fruit trees (avocado, citrus), when there's no frost and the soil isn't waterlogged or cold.
In all cases, it is necessary Avoid windy, sunny, very dry or torrential rain daysThe ideal climate is cool, humid, with little direct radiation and mild temperatures, which minimizes water stress and promotes recovery.
Types of transplant: bare root and root ball
There are two main methods for transplanting trees, depending on the species, size and stage of development:
- Bare root transplant:
- It is usually done in young deciduous trees, under 3 years old and less than 2 meters tall.
- This involves removing the tree with its roots practically free of soil. This is common practice in nurseries to facilitate transport and planting.
- It is not recommended for sensitive, evergreen or mature tree species, as root cutting can be lethal.
- Transplant with root ball:
- The tree is dug out with a block of soil attached to the roots. This retains moisture and protects the root system.
- It is the preferred method for evergreen species, large trees or delicate specimens. such as conifers, oaks, acacias, etc.
- The root ball should be wrapped in burlap, jute, or heavy-duty plastic to prevent it from crumbling during transport.
In all cases, how much the greater the volume of preserved roots, the better the chances of survival.
Step by Step: How to Transplant a Tree Correctly
The transplanting process must be carried out with technique and precision. Here's a step-by-step guide for any tree size, adapting the methodology to the plant's characteristics:
- Planning and choosing the location:
- Select one in the garden suitable location to the needs of the species (light, shade, space, humidity and drainage).
- Make sure there is no underground infrastructure (pipes, cables, gas, etc.) consulting with local authorities if necessary.
- Preparation of the destination land:
- Dig the new hole before removing the tree. It should be 2 to 3 times the width of the root ball and as deep as the root ball or slightly deeper.
- If the soil is clayey and prone to waterlogging, mix in sand to improve drainage.
- Place a layer of fertile, crumbly soil at the base, and aged compost if possible. Chemical fertilizer is not recommended at this time.
- Tree selection and preparation:
- Water the tree the day before to keep the soil moist and make removal easier.
- For young deciduous trees, you can choose bare-root transplanting. For large, evergreen, or delicate trees, do so. with root ball.
- Digging the tree:
- Using a sharp shovel, dig a circular trench far enough away from the trunk (usually 6-10 times the trunk diameter in large trees).
- Try to damage the main roots as little as possible and keep the soil block around them.
- For delicate or large species, extraction can be done in two stages, cutting only the lateral roots the first year and the main root the following winter, facilitating rooting.
- Wrapping the root ball and moving:
- Wrap the root ball in burlap, mesh, or heavy-duty plastic and tie it securely.
- If the root ball is very large or fragile, it can be covered with plaster after placing a metal mesh, which will prevent it from breaking.
- Transport the tree carefully, not by lifting it by the trunk, but by supporting the base of the root ball. Use assistance or machinery for large specimens.
- Placement and planting in the new hole:
- Introduce the tree by placing it at the same ground level as before. Do not bury the neck of the trunk.
- Remove burlap or other protective materials as much as possible to help the roots explore the new soil.
- Gently tamp the soil to eliminate air pockets but without compacting too much.
- Installing a tutor or support:
- On tall, exposed, or small-rooted trees, place a tutor made of wood or plastic, buried at least 10 cm from the stem and secured with rope or flexible hose to prevent damage from friction.
- More than one stake can be installed forming a triangle for greater stability in windy areas.
- Watering and mulching:
- Water generously after transplanting, and keep the soil moist for the first few weeks. Avoid waterlogging.
- Apply mulch (shredded bark, leaf litter, or compost) around the trunk, leaving 3-5 cm of separation from the stem to avoid fungal problems.
- For large trees, you can bury one or two plastic tubes (“macaroni”) in the hole to deliver water directly to the roots during initial waterings.
- Post-transplant care:
- Monitor humidity, adjusting watering frequency according to the climate and root ball size.
- Don't fertilize immediately after transplanting. Wait until the following spring or until the plant has settled in and shows signs of new growth.
- Inspect regularly for pests, fungi, or water stress and protect the tree with plant protection products if necessary.
- Perform light training pruning if necessary. Trim only as much as necessary for deciduous trees; trim only as much as necessary for evergreens; never over-prune conifers.
How to transplant potted trees: tips and tricks
In small spaces, such as on terraces or balconies, it's common to grow trees in pots or large containers. Transplanting in these cases is more frequent and less traumatic, but it also requires some precautions.
- Know when to transplant: The clearest sign that a tree needs repotting is when its roots fill the entire potting medium, emerge from the drainage holes, or spiral up the sides of the container. It's also true if growth stops or the tree appears prematurely aged.
- Frequency: For small trees and fruit trees, transplanting is usually done every 2 to 3 years. For larger trees, it's done every 3 to 5 years. If the soil becomes compacted, smelly, or the tree becomes diseased for no apparent reason, it may be necessary to repot earlier.
- New pot size: The container must have between 10 and 20 cm larger in diameter than the previous one. For dwarf fruit trees or modern rootstocks, the ideal volume is 50 to 70 liters (45 to 55 cm in diameter).
- Substratum: Use garden soil mixes with sand, mature compost, and, if possible, some clay for moisture retention. Avoid overly light substrates.
- Sewer system: Place stones, gravel, or ceramic fragments at the base before adding the substrate to prevent waterlogging.
- Extraction and cleaning: Carefully pull out the tree, inspect the root system, and remove any dead or diseased roots. If the roots are matted, gently cut some off to stimulate growth.
- Substrate replacement: Every time you transplant, take the opportunity to renew the substrate in a third or half of the pot, removing the old and adding new soil.
- Pruning: If the plant's canopy is too large for the new container, perform balanced pruning to reduce root stress.
- Irrigation and adaptation: Transplant on cloudy days or at dusk, water generously and protect the plant from direct sunlight for the first few days.
Special care according to the species and size of the tree
Transplanting can have various complications depending on the species and size of the specimen:
- Delicate species (e.g., acacias, mimosas, pines, eucalyptus): These are more susceptible to root damage and require a generous root ball and maximum protection. For conifers, it's advisable to dig the extraction trench one winter beforehand and complete the transfer the following winter to improve rooting.
- Adult and large trees: They usually require machinery (mini excavators, truck cranes) and the intervention of arboriculture specialists. The root balls weigh several hundred kilos and must be moved with extreme care.
- Fruit treesDeciduous species such as apple, pear, and cherry trees adapt well to dormant transplants. Evergreen fruit trees (citrus, avocado) are more delicate because they maintain their foliage year-round; they should only be transplanted when there is no risk of cold or soil saturation.
- Bare root trees: It only accepts transplants during the full vegetative rest period and in young deciduous specimens.
Common mistakes and how to avoid them during transplantation
Some common mistakes can drastically reduce the success rate of a transplant. The most common include:
- Transplanting at the wrong time: If you perform the operation in full vegetative growth, the tree will suffer dehydration and lethal stress.
- Root ball too small: Whenever possible, remove as much of the roots and adhering soil as possible.
- plant too deepThe neck of the tree should be at ground level. If it's buried, the roots may rot due to lack of oxygen.
- Leaving air pockets when filling: Make sure to compact the soil around the root ball.
- Lack of tutor: A newly transplanted tree can be overturned by wind or rain if it is not well supported.
- Excessive watering: Keep moisture at the root but never flood the soil.
- Premature fertilizationChemical fertilizers can damage newly transplanted roots. Use only mature compost.
- Do not clean or disinfect damaged roots: Remove and clean broken roots to avoid infections.
- Prolonged exposure of roots to air: Minimizes the time between tree extraction and planting.
Post-transplant care and maintenance
- Frequent but not excessive watering: During the first few weeks and months, keep the substrate moist but never waterlogged. The best indicator is to check the moisture with your finger or a moisture meter.
- PaddingMaintaining a 2- to 5-cm layer of mulch or leaf litter helps conserve moisture and control weeds. Don't allow the mulch to touch the trunk.
- Protection against pests and diseasesAfter transplanting, the tree is more vulnerable to fungi, insects, and rodents. Inspect it regularly and respond if symptoms appear.
- Light pruningIf the tree has too much foliage relative to the capacity of its new root system, you can prune lightly to reduce evaporation. For fruit trees, delay formative pruning until the following season.
- Application of antiperspirants and biostimulants: Products such as antiperspirant oils, amino acids, or algae extracts can be sprayed on foliage to reduce water loss and stimulate recovery.
- Tutors: Periodically check and adjust the stakes to prevent strangulation. Remove them after a year, when the tree is established.
- Avoid immediate chemical fertilizationsWait until the tree begins to actively grow before applying mineral fertilizer. You can apply mature compost or humus during transplanting and replenish it in the following months.
- keep watchThe first 6-12 months are crucial. Check soil conditions, moisture, sprouting, pest appearance, or signs of stress.
Transplanting under special conditions: large trees or trees of heritage value
Transplanting a large adult tree or specimens of historical, cultural or sentimental value requires specialized techniques:
- Qualified technical personnel, specific machinery (bulldozers, cranes, trucks), and often municipal or property permits are essential.
- The process includes studying the root system, calculating the root ball (usually large in diameter), extra protection (mesh, plaster), prior root pruning, and sometimes preparing the plant for one or two years before the final move.
- In some cases, the tree must be transported with its root ball “plastered” or in a special basket to prevent any collapse.
- Post-transplant care must be taken with appropriate irrigation, phytosanitary treatments, professional supervision, and follow-up for several years.
- Some extraordinary trees, due to their size, age, or delicacy, are not suitable for transplanting and it is preferable to keep them in their original location.
Frequently asked questions and myths about tree transplants
- Is it true that trees transplanted in leap years only bear fruit every 4 years?
No. This is a popular myth with no scientific basis. A tree's ability to flower and bear fruit is regulated by its biological clock, photoperiod, and ambient temperature, not by the calendar. - Can I transplant trees at any time of the year?
No. It is essential to respect the dormant period for deciduous trees and avoid climatic extremes for evergreen and fruit trees. - Is it better to add a lot of compost or organic matter to the planting hole?
Experts recommend filling the hole primarily with the same soil removed, so that the roots are encouraged to explore outside the root ball and are not confined to a more fertile but limited environment. - Can I transplant a tree myself?
It depends on the size. Small trees can be transplanted by one or two hobbyists. Larger specimens require professional help or services.
Expert advice for a successful transplant
- Always plan the operation in advance and never improvise.
- Reduces the time roots remain exposed to air between extraction and planting.
- Avoid transplanting just after heavy rains if the soil is saturated with water.
- Choose cloudy, cool, and windless days to minimize the impact of water stress.
- In delicate trees, perform root pruning around the perimeter during the fall before the final transplant.
- If the tree will be out of the ground for several hours or days, keep the root ball moist and protected with burlap.
- Consult with experts or specialized companies if the case requires it.
- Apply mulch and water regularly, but not excessively.
