Grafting Fruit Trees: The Ultimate Guide to Propagation, Improvement, and Care

Introduction to grafting multiplication in fruit trees

Propagation by grafting is an essential method in modern fruit growing.It allows the characteristics of a specific variety to be faithfully reproduced and perpetuated while simultaneously taking advantage of the resistance or adaptations of the rootstock's root system. Thanks to advanced grafting techniques, it is possible to develop trees that combine the best of different individuals, optimizing production, fruit quality, and tree longevity.

Key concepts: sexual and asexual reproduction in plants

Plants can multiply in sexual form, through seeds, or of asexual or vegetative formIn sexual reproduction, fertilization results in offspring with genetic variability, meaning that the new individuals may not be exactly like their parents. This is useful for diversity, but it doesn't guarantee the exact reproduction of a valued variety.

On the contrary, the vegetative multiplication It uses parts of the mother plant (stems, roots, buds, leaves, etc.) to generate clones or genetically identical individuals. Among the asexual techniques, the most notable is graft, which consists of joining two plants so that they grow as a single organism, allowing selected varieties to be faithfully perpetuated.

What is grafting? Definition, parts, and basic principles

Grafting is the union of two portions of plants so that they function physiologically and structurally as one.The parties involved are:

• Pattern, rootstock or stock: It provides the root system, adapted to the soil and climate, and partly determines the hardiness, vigor and resistance to diseases.
• Scion, variety, graft or scion: It is the fragment of a plant destined to form the aerial part (branches, leaves, fruits), selected for its productive or quality characteristics.

Once the rootstock and scion merge, each retains its genetic characteristics, but the resulting plant benefits from the combined advantages of both.

Importantly cellular contents do not mix; the flow of sap and nutrients occurs through the connection of vascular tissues across the cambium, but there is no amalgamation of cells.

Advantages and reasons for grafting fruit trees

• Reproduce clones of varieties with exceptional qualities, perpetuating them over time.
• Improve adaptation and resistance of trees using rootstocks tolerant to adverse conditions (drought, limestone, salinity, diseases, pests, etc.).
• Change variety into an adult tree (regrafting) without having to remove the original plant.
• Shorten the juvenile period of the fruit tree, anticipating the entry into production.
• Repair damaged parts (wounds, fractures, frost losses).
• Rejuvenate aged trees.
• Multiply species that do not produce viable seeds or have poor rooting capacity per cutting.
• Facilitate phytosanitary studies and genetic experimentation in nurseries and test fields.

Compatibility, affinity and selection of rootstocks and varieties

For the graft to be successful, the pattern and variety must be compatibleCompatibility depends on botanical relationship:

• Same variety or clone: Total compatibility (example: reineta apple tree on reineta apple tree).
• Different varieties of the same species: Optimal compatibility (example: any pear tree on any pear tree).
• Different species of the same genus: Frequent compatibility, but with exceptions (for example, citrus fruits are usually compatible with each other, while in the Prunus genus there are combinations that do not work).
• Different genera of the same family: Uncommon compatibility, but possible in very specific cases, such as quince tree with pear tree.
• Different families: Generally there is no compatibility.

The affinity determines the possibility of initial union, but the compatibility It involves the persistence and successful development of the graft. Affinity may occur, but not long-term compatibility due to physiological problems.

Pattern choice: The rootstock can be sexual (loose rootstock, seed-borne) or asexual (clonal rootstock, propagated by cuttings, layering, etc.). Healthy, vigorous, and environmentally adapted material should be selected. The seeds used for loose rootstocks usually come from hardy, healthy trees, preferably wild ones.

Variety selection (spike)The material must be genetically faithful, disease-free, and obtained from current-year branches with at least three buds. Scions collected in advance for spring grafting should be kept stratified and kept cool.

Species multiplication and asexual propagation systems

Vegetative propagation goes beyond grafting, with other methods useful in fruit growing. These include:

• Cuttings or stakes: Pieces of stem that take root and form independent plants.
• Layering: They cause roots to form on a branch while it remains attached to the parent plant; it is then separated and planted.
• Stolons: Horizontal stems that produce new plants when they touch the ground.
• Bulbs, corms, rhizomes and tubers: Propagation by underground organs.
• Young: Plantlets that sprout at the base of the original plant.

All these techniques, together with grafting, allow us to obtain clones and reproduce desired characteristics, but Grafting is essential to perpetuate varieties that cannot be propagated well by other means. or when you want to combine the advantages of two different plants.

Previous recommendations and criteria for preparing graft material

• The pattern and the pick must be healthy, free of viruses and diseases.
• Choosing branches of the year, preferably semi-woody, with well-formed buds.
• Prepare the scions with 3 buds and shape them appropriately according to the type of graft.
• Store correctly the scions collected before the grafting season (stratified in moist sand and refrigerated).
• Remove leaves from the spikes, reduce leaf surface if necessary to avoid dehydration.
• Perform the graft with clean, sharp tools; is essential for a clean cut and to avoid infections.
• Disinfect the work area and tools before each intervention.

Factors influencing graft success: environmental and physiological

• Environmental conditions:
  • Temperature: It influences the formation of callus tissue. Cambial activity and callus formation are optimal at temperate temperatures, avoiding extremes of cold or heat. The range may vary depending on the species, but is typically between 12°C and 32°C.
  • Humidity: Callus tissue is delicate and dries easily. It is recommended to maintain adequate humidity and protect the junction area with special tape or mastic.
  • Oxygen: Essential for cell development and callus tissue respiration. The tying material must allow oxygen to pass through (avoid airtight plastics).
• Change contact: Success depends on the cambium (the layer between the bark and the wood) of the rootstock and the scion remaining in close contact. If they don't align properly, the vascular union doesn't form and the graft fails.
• Time of execution: The plant's physiology determines the ideal timing. The rootstock should be vegetatively active, and the scion relatively dormant, to avoid premature sprouting before the buds merge.

Recommended time of year for grafting fruit trees

• Spring Season: This is the best time for most scion grafts (cleft, English, crown, and flank), as well as plate and chip grafts. It is used when the sap begins to move and the bark separates easily.
• Late summer: Suitable for bud grafts (shield or T, chip), taking advantage of vegetative activity before dormancy.
• temperate climates: The optimal time is usually late winter and early spring. In areas with mild winters, the window can be opened earlier.
• In greenhouses, the grafting season can be extended throughout the year, with temperature and humidity being artificially regulated.

A sign that it is an ideal time to graft is when the rootstock bark peels off easily, indicating high sap flow.

Main types of grafts in fruit growing and their applications

The choice of graft type depends on the species, the diameter of the rootstock and the desired objective.The most commonly used methods include:

Scion grafts

• Cleft graft: The pick is inserted into a groove cut in the rootstock. It is widely used for rootstocks of a certain thickness, such as branches from apple, pear, plum, and other trees.
• Crown (or bark) graftThe scion is inserted under the raised bark of the rootstock; useful for regrafting adult trees or renewing crowns.
• Side graftThe scion inserts laterally into the rootstock, allowing some of the original sap flow to be maintained. Useful for rootstocks that are still growing.
• English graft: A beveled cut is made in pattern and prong, fitting and tying them, with a possible additional tongue to increase the cambial contact surface.

Yolk grafts

• T-graft (shield)A T-shaped incision is made in the rootstock bark, and a bud with a small shield of bark is inserted. This is very effective for citrus, roses, and stone and pome fruit trees.
• Chip graft: This involves inserting a bud with a piece of wood (chip) into a groove in the rootstock. Suitable for rootstocks with bark that doesn't slide easily.
• Plate or veneer graft: Variant in which a plate of wood and bark with bud is extracted and embedded in the pattern.

Other techniques

• Approximation graftTwo live plants are joined together by bringing them together, and then, once the union is established, the excess is cut off. Useful for plants that are difficult to graft using other methods.
• Bridge graft: It is used to save damage to trunks, facilitating the transit of sap in accidental cuts.

Selection of the technique according to the type of fruit tree

• Species with vigorous shoots and easy grafting:Bud grafts (shield, chip) are preferable, especially in apple, pear, citrus and rose trees.
• Fruit trees that require a firm structural union: The spike ones (cleft, crown, side, English) are more resistant and recommended for patterns or branches of larger diameter.
• Specific species:
  • Almond, peach, plum, apricot: It accepts both bud and scion grafts, but it is essential to choose the appropriate rootstock.
  • Citrus: Bud-type cultivars (shield, chip) are preferred over rootstocks resistant to soil-borne diseases.
  • Apple tree, pear tree: Excellent response to scion grafts and bud grafts.

Compatibility and possible combinations between fruit trees

Compatibility varies between species and genders. Here are some common combinations:

• Almendro: On almond, peach, plum, apricot, nectarine, blackthorn.
• Orange: On orange, mandarin, lemon, grapefruit, citrus fruits in general.
• pear tree: On pear, quince, medlar, hawthorn.
• Peach tree: On peach, almond, nectarine, Paraguayan, plum, apricot tree.
• Plum: On plum, almond, peach, apricot, blackthorn, nectarine, Paraguayan.
• Manzano: Preferably on apple tree.
• Cherry and sour cherry: Cross-compatibility between them, not with other species of the genus Prunus.
• Custard apple, avocado, fig, mango, chestnut, pomegranate: Graft only on the same species or on a free-standing rootstock.

ImportantNot all of the above combinations work under all conditions. It's essential to consult specific tables and local experience before performing unusual grafts.

Care and detailed steps for successful grafting in fruit trees

1. Preparation of the materialHealthy rootstock and spike, correctly identified and cut.
2. Clean and precise cut using sharp grafting knives or blades.
3. Intimate contact of the cambium (green area between bark and wood) between rootstock and variety. In each type of graft, the technique seeks to maximize this overlap.
4. Firm tie and protection with special tape, raffia, or parafilm. Mastic can be applied to seal and prevent moisture loss.
5. Eliminate unwanted sprouts from the pattern so that all the sap ascends to the grafted variety.
6. Tutoring the branch if necessary, especially in windy areas or young patterns.
7. Remove the tie at the right time: Bud-bearing seedlings usually emerge after 10-20 days; scion-bearing seedlings emerge when the grafted buds sprout and are about 5-10 cm long.
8. Periodic revision and elimination of possible failures or regrowth of the pattern below the grafting point.

Common mistakes and tips to improve success rate

• Not aligning the cambium (most common error): Without cambial contact, there is no welding and the graft dies.
• Choose wood with low viability (old, diseased branches): The spikes must be vigorous and seasonal.
• Tying too loose or too tight: The joint must be firm without strangling.
• Failure to adequately protect the cuts and the joining area.
• Performing the graft at the wrong time for the species and local climate.
• Neglecting post-graft care (untying, staking, removing unwanted shoots).
• Not disinfecting tools between grafts can increase the transmission of viruses or pathogens.

Examples of asexual reproduction and fruit tree species that benefit from grafting

Many fruit trees are propagated almost exclusively by grafting to maintain fruit quality and adaptability. Common examples include:

• Stone fruit trees: Plum, peach, cherry, almond, apricot, nectarine, Paraguayan.
• Pome fruit treesApple tree, pear tree, quince tree, medlar tree.
• Citrus: Orange, lemon, mandarin, grapefruit.
• Other species: Avocado, custard apple, mango, fig, chestnut, pomegranate, persimmon, pistachio.

Its use is also essential for ornamental roses, wisteria, camellias, and other garden plants that require grafting for better bearing or flowering.

Recommended tools and materials for grafting

• Grafting knife or penknife: essential for clean and precise cuts.
• Pruning saw: For large diameters or aged branches.
• Parafilm, grafting tapes or raffia: To secure the joint and protect from the environment.
• Specific mastic or wax for grafts: To seal cuts and prevent drying or entry of pathogens.
• Tutors: Ensure the stability of the grafted branch against wind.
• Disinfectant (alcohol, diluted bleach): To clean tools between each operation and prevent the spread of diseases.

Frequently asked questions about grafting fruit trees

• Can two different species be grafted?
  Only if they belong to the same genus or, in rare cases, the same family and have sufficient physiological compatibility. For more details, see our guide on You should know about fruit grafts.
• Does grafting result in new or hybrid fruits?
  No. The variety (scion) always produces the type of fruit from which it originates, even if it's grafted onto another species. There are no "mixed" fruits caused by grafting; the nectarine, for example, doesn't come from a graft between a plum and a peach, but from a mutation.
• Can I graft onto old or damaged trees?
  Yes, especially through crown or bridge grafts, to renew crowns or bridge wounds. More information at how to graft fruit trees.
• Why does a graft fail?
  The most common causes are lack of cambial contact, diseased material, adverse environmental conditions, poor timing, or procedural errors.

Grafting in fruit trees: practical examples and recommended combinations

Below is a list of compatibilities and recommendations for grafting different fruit trees, also consulting Regional guide to fruit trees in Spain.

• Manzano: Grafting onto apple trees (high compatibility and persistence). More at reineta apple.
• pear tree: Graft onto pear or quince trees (quince trees produce smaller growth, making them useful for small orchards). For varieties, visit varieties of pears.
• Plum, almond, peach, peach, apricot, nectarine: Cross-combinations are usually allowed within the Prunus genus, but some species (such as cherry) are more restrictive. For more details, see purple-leaf plum.
• Citrus: Bud-forming (shield, chip) is preferred over rootstocks resistant to soil-borne diseases. Additional information at Citrus.
• Pistachio/terebinth: Partial compatibility between genera Pistacia and Schinus in special cases. More at pistachio seeds.
• Pomegranate, chestnut, fig, mango, avocado: Grafting onto the same species or free-standing rootstock, with more information at .

It is always recommended consult local experts or specialized nurseries to learn about successful combinations typical of the region.

Care and detailed steps for successful grafting in fruit trees

1. Preparation of the materialHealthy rootstock and spike, correctly identified and cut.
2. Clean and precise cut using sharp grafting knives or blades.
3. Intimate contact of the cambium (green area between bark and wood) between rootstock and variety. In each type of graft, the technique seeks to maximize this overlap.
4. Firm tie and protection with special tape, raffia, or parafilm. Mastic can be applied to seal and prevent moisture loss.
5. Eliminate unwanted sprouts from the pattern so that all the sap ascends to the grafted variety.
6. Tutoring the branch if necessary, especially in windy areas or young patterns.
7. Remove the tie at the right time: Bud-bearing seedlings usually emerge after 10-20 days; scion-bearing seedlings emerge when the grafted buds sprout and are about 5-10 cm long.
8. Periodic revision and elimination of possible failures or regrowth of the pattern below the grafting point.

Common mistakes and tips to improve success rate

• Not aligning the cambium (most common error): Without cambial contact, there is no welding and the graft dies.
• Choose wood with low viability (old, diseased branches): The spikes must be vigorous and seasonal.
• Tying too loose or too tight: The joint must be firm without strangling.
• Failure to adequately protect the cuts and the joining area.
• Performing the graft at the wrong time for the species and local climate.
• Neglecting post-graft care (untying, staking, removing unwanted shoots).
• Not disinfecting tools between grafts can increase the transmission of viruses or pathogens.

Examples of asexual reproduction and fruit tree species that benefit from grafting

Many fruit trees are propagated almost exclusively by grafting to maintain fruit quality and adaptability. Common examples include:

• Stone fruit trees: Plum, peach, cherry, almond, apricot, nectarine, Paraguayan.
• Pome fruit treesApple tree, pear tree, quince tree, medlar tree.
• Citrus: Orange, lemon, mandarin, grapefruit.
• Other species: Avocado, custard apple, mango, fig, chestnut, pomegranate, persimmon, pistachio.

Its use is also essential for ornamental roses, wisteria, camellias, and other garden plants that require grafting for better bearing or flowering.

Recommended tools and materials for grafting

• Grafting knife or penknife: essential for clean and precise cuts.
• Pruning saw: For large diameters or aged branches.
• Parafilm, grafting tapes or raffia: To secure the joint and protect from the environment.
• Specific mastic or wax for grafts: To seal cuts and prevent drying or entry of pathogens.
• Tutors: Ensure the stability of the grafted branch against wind.
• Disinfectant (alcohol, diluted bleach): To clean tools between each operation and prevent the spread of diseases.

Frequently asked questions about grafting fruit trees

• Can two different species be grafted?
  Only if they belong to the same genus or, in rare cases, the same family and are sufficiently physiologically compatible. For more details, see our section on .
• Does grafting result in new or hybrid fruits?
  No. The variety (scion) always produces the type of fruit from which it originates, even if it's grafted onto another species. There are no "mixed" fruits caused by grafting; the nectarine, for example, doesn't come from a graft between a plum and a peach, but from a mutation.
• Can I graft onto old or damaged trees?
  Yes, especially through crown or bridge grafts, to renew crowns or bridge wounds. More information at .
• Why does a graft fail?
  The most common causes are lack of cambial contact, diseased material, adverse environmental conditions, poor timing, or procedural errors.

Grafting in fruit trees: practical examples and recommended combinations

Below is a detailed and expanded list of compatibility and recommendations for grafting different fruit trees, also available in .

• Manzano: Grafting onto apple trees (high compatibility and persistence). More at .
• pear tree: Graft onto pear or quince trees (quince trees produce smaller growth, making them useful for small orchards). For varieties, visit .
• Plum, almond, peach, peach, apricot, nectarine:Cross-combinations within the Prunus genus are generally allowed, but some species (such as cherry) are more restrictive. For more details, see .
• Citrus: Bud-forming (shield, chip) cultivars are preferred over rootstocks resistant to soil-borne diseases. Additional information is available at .
• Pistachio/terebinthPartial compatibility between genera Pistacia and Schinus in special cases. More at .
• Pomegranate, chestnut, fig, mango, avocado: Grafting onto the same species or free-standing rootstock, with more information at .

It is always recommended consult local experts or specialized nurseries to learn about successful combinations typical of the region.

Care and detailed steps for successful grafting in fruit trees

1. Preparation of the materialHealthy rootstock and spike, correctly identified and cut.
2. Clean and precise cut using sharp grafting knives or blades.
3. Intimate contact of the cambium (green area between bark and wood) between rootstock and variety. In each type of graft, the technique seeks to maximize this overlap.
4. Firm tie and protection with special tape, raffia, or parafilm. Mastic can be applied to seal and prevent moisture loss.
5. Eliminate unwanted sprouts from the pattern so that all the sap ascends to the grafted variety.
6. Tutoring the branch if necessary, especially in windy areas or young patterns.
7. Remove the tie at the right time: Bud-bearing seedlings usually emerge after 10-20 days; scion-bearing seedlings emerge when the grafted buds sprout and are about 5-10 cm long.
8. Periodic revision and elimination of possible failures or regrowth of the pattern below the grafting point.

Common mistakes and tips to improve success rate

• Not aligning the cambium (most common error): Without cambial contact, there is no welding and the graft dies.
• Choose wood with low viability (old, diseased branches): The spikes must be vigorous and seasonal.
• Tying too loose or too tight: The joint must be firm without strangling.
• Failure to adequately protect the cuts and the joining area.
• Performing the graft at the wrong time for the species and local climate.
• Neglecting post-graft care (untying, staking, removing unwanted shoots).
• Not disinfecting tools between grafts can increase the transmission of viruses or pathogens.

Examples of asexual reproduction and fruit tree species that benefit from grafting

Many fruit trees are propagated almost exclusively by grafting to maintain fruit quality and adaptability. Common examples include:

• Stone fruit trees: Plum, peach, cherry, almond, apricot, nectarine, Paraguayan.
• Pome fruit treesApple tree, pear tree, quince tree, medlar tree.
• Citrus: Orange, lemon, mandarin, grapefruit.
• Other species: Avocado, custard apple, mango, fig, chestnut, pomegranate, persimmon, pistachio.

Its use is also essential for ornamental roses, wisteria, camellias, and other garden plants that require grafting for better bearing or flowering.

Recommended tools and materials for grafting

• Grafting knife or penknife: essential for clean and precise cuts.
• Pruning saw: For large diameters or aged branches.
• Parafilm, grafting tapes or raffia: To secure the joint and protect from the environment.
• Specific mastic or wax for grafts: To seal cuts and prevent drying or entry of pathogens.
• Tutors: Ensure the stability of the grafted branch against wind.
• Disinfectant (alcohol, diluted bleach): To clean tools between each operation and prevent the spread of diseases.

Frequently asked questions about grafting fruit trees

• Can two different species be grafted?
  Only if they belong to the same genus or, in rare cases, the same family and are sufficiently physiologically compatible. For more details, see our section on .
• Does grafting result in new or hybrid fruits?
  No. The variety (scion) always produces the type of fruit from which it originates, even if it's grafted onto another species. There are no "mixed" fruits caused by grafting; the nectarine, for example, doesn't come from a graft between a plum and a peach, but from a mutation.
• Can I graft onto old or damaged trees?
  Yes, especially through crown or bridge grafts, to renew crowns or bridge wounds. More information at .
• Why does a graft fail?
  The most common causes are lack of cambial contact, diseased material, adverse environmental conditions, poor timing, or procedural errors.

Grafting in fruit trees: practical examples and recommended combinations

Below is a detailed and expanded list of compatibility and recommendations for grafting different fruit trees, also available in .

• Manzano: Grafting onto apple trees (high compatibility and persistence). More at .
• pear tree: Graft onto pear or quince trees (quince trees produce smaller growth, making them useful for small orchards). For varieties, visit .
• Plum, almond, peach, peach, apricot, nectarine:Cross-combinations within the Prunus genus are generally allowed, but some species (such as cherry) are more restrictive. For more details, see .
• Citrus: Bud-forming (shield, chip) cultivars are preferred over rootstocks resistant to soil-borne diseases. Additional information is available at .
• Pistachio/terebinthPartial compatibility between genera Pistacia and Schinus in special cases. More at .
• Pomegranate, chestnut, fig, mango, avocado: Grafting onto the same species or free-standing rootstock, with more information at .

It is always recommended consult local experts or specialized nurseries to learn about successful combinations typical of the region.

Care and detailed steps for successful grafting in fruit trees

1. Preparation of the materialHealthy rootstock and spike, correctly identified and cut.
2. Clean and precise cut using sharp grafting knives or blades.
3. Intimate contact of the cambium (green area between bark and wood) between rootstock and variety. In each type of graft, the technique seeks to maximize this overlap.
4. Firm tie and protection with special tape, raffia, or parafilm. Mastic can be applied to seal and prevent moisture loss.
5. Eliminate unwanted sprouts from the pattern so that all the sap ascends to the grafted variety.
6. Tutoring the branch if necessary, especially in windy areas or young patterns.
7. Remove the tie at the right time: Bud-bearing seedlings usually emerge after 10-20 days; scion-bearing seedlings emerge when the grafted buds sprout and are about 5-10 cm long.
8. Periodic revision and elimination of possible failures or regrowth of the pattern below the grafting point.

Common mistakes and tips to improve success rate

• Not aligning the cambium (most common error): Without cambial contact, there is no welding and the graft dies.
• Choose wood with low viability (old, diseased branches): The spikes must be vigorous and seasonal.
• Tying too loose or too tight: The joint must be firm without strangling.
• Failure to adequately protect the cuts and the joining area.
• Performing the graft at the wrong time for the species and local climate.
• Neglecting post-graft care (untying, staking, removing unwanted shoots).
• Not disinfecting tools between grafts can increase the transmission of viruses or pathogens.

Examples of asexual reproduction and fruit tree species that benefit from grafting

Many fruit trees are propagated almost exclusively by grafting to maintain fruit quality and adaptability. Common examples include:

• Stone fruit trees: Plum, peach, cherry, almond, apricot, nectarine, Paraguayan.
• Pome fruit treesApple tree, pear tree, quince tree, medlar tree.
• Citrus: Orange, lemon, mandarin, grapefruit.
• Other species: Avocado, custard apple, mango, fig, chestnut, pomegranate, persimmon, pistachio.

Its use is also essential for ornamental roses, wisteria, camellias, and other garden plants that require grafting for better bearing or flowering.

Recommended tools and materials for grafting

• Grafting knife or penknife: essential for clean and precise cuts.
• Pruning saw: For large diameters or aged branches.
• Parafilm, grafting tapes or raffia: To secure the joint and protect from the environment.
• Specific mastic or wax for grafts: To seal cuts and prevent drying or entry of pathogens.
• Tutors: Ensure the stability of the grafted branch against wind.
• Disinfectant (alcohol, diluted bleach): To clean tools between each operation and prevent the spread of diseases.

Related article:

Complete and updated guide to fruit grafting: techniques, tricks and tips