
Cannabis Lexicon
Monster cropping combines cutting propagation and re-vegging: a flowering shoot is rooted and guided back into the vegetative phase under a long light cycle. Its primary purpose is not to guarantee increased yield, but to retrospectively save a special phenotype.
How flowering cuttings are rooted and re-vegged, why unusual leaves and strong branching occur, and why monster cropping is primarily interesting as a rescue strategy for valuable genetics.
Definition
Monster cropping is a clonal propagation method for photoperiodic cannabis plants. A cutting is taken during the flowering phase, rooted, and subsequently returned to vegetative growth under long-day conditions.
Source material: a healthy shoot from an already flowering, photoperiodic plant.
Dual transition: The cutting must form adventitious roots while simultaneously reverting to the vegetative phase.
Primary benefit: A "keeper" can still be saved even if no backup clone was taken before flowering.
Typical appearance: single- or three-fingered transition leaves and often strong, irregular branching.
No guarantee: Monster cropping does not automatically increase the rooting rate or the subsequent yield.
In this article
Key Takeaway
Monster cropping is most valuable as a second chance for an exceptional phenotype. For planned selection, vegetative backup clones taken before flowering are faster and more predictable.
Monster cropping is a special form of clonal propagation. In this process, a cutting is not taken from a plant in the vegetative phase as is standard, but rather from an already flowering, photoperiodic cannabis plant. The flowering shoot is rooted and then guided back into vegetative development under a long light cycle.
The method thus combines two techniques:
Monster cropping is not a standardized botanical term. The name originated within the growing community and alludes to the unusually branched, sometimes almost chaotic growth that reverted flowering cuttings can develop.
The most important benefit, however, is not an alleged monstrous increase in yield. Monster cropping is primarily a rescue strategy for genetics: a plant can still be preserved as a clone even if no cutting was secured during the vegetative phase and its special qualities only become visible during flowering.
With classic cloning, young, vegetative side shoots are cut and induced to form new roots. The cutting is already in a vegetative development phase and, after successful rooting, can continue to grow in a comparatively straightforward manner.
In monster cropping, however, the cutting originates from the flowering phase. Its tissue and shoot tip are already set for reproductive development. In addition to leaves, the cutting often carries initial bracts, stigmas, and small bud sites.
The process therefore consists of two transitions:
This double transition makes monster cropping slower and less predictable than standard cloning.
The three terms overlap but do not describe exactly the same thing.
A cutting is taken from a vegetative plant or mother plant. It is rooted and subsequently continues to grow vegetatively.
A cutting is taken from an already flowering plant. After rooting, it is returned to the vegetative phase under long-day conditions.
The original plant is not completely removed after or during flowering. Some buds, leaves, and shoots remain. Subsequently, the entire plant is exposed to a long light cycle again.
Monster cropping is thus a form of re-vegging at the cutting level.
The biggest advantage is the retrospective preservation of an interesting phenotype.
When selecting from seeds, it is not possible to fully determine which plant will be particularly impressive later before flowering begins. Many important characteristics only become visible during the flowering phase:
If no clone was taken beforehand, the special phenotype would normally be lost after the harvest. A flowering cutting can then be the last opportunity to vegetatively preserve the genotype.
A keeper is a plant that should be preserved long-term due to its special properties. Which plant is suitable for this can only be judged to a limited extent from the vegetative phase alone.
Vigorous growth does not automatically mean:
Conversely, a plant that appears unremarkable during the vegetative phase can develop an extraordinary profile during flowering.
This is especially true for phenotype searches from modern photoperiodic genetics such as Pink Piña – Grounded Genetics, Moonbow 112 IX – Archive Seed Bank, Imperial Grapes – Commonwealth Seed Co., Granita – Perfect Tree Seeds, or Nam Wah – Symbiotic Genetics. Such strain pages describe the genetic potential, but which individual seedling eventually becomes a keeper only becomes apparent during the actual grow.
Monster cropping is useful, but it is not the most reliable form of phenotype preservation. Those conducting targeted selection should ideally take a vegetative backup clone from every candidate before the original plants are sent into flowering.
The workflow of a controlled selection process can look like this:
Monster cropping becomes relevant primarily when this step has been skipped or a plant unexpectedly performs very well.
Roots that develop from a cut stem are called adventitious roots. Their formation is a complex process involving wound signals, carbohydrates, plant hormones, and the physiological state of the tissue.
Numerous processes within the plant change with the shift from vegetative to reproductive development. General plant studies show that tissue may have poorer conditions for adventitious rooting after the transition to flowering. Among other things, the auxin balance and the reaction of the cut area change during this time.
For cannabis, this correlation has not yet been sufficiently directly investigated in the context of monster cropping. Practically, however, it is plausible why an already flowering shoot requires more time and energy than a young vegetative cutting:
Not every flowering cutting fails. However, the success rate is often less predictable than with healthy vegetative cuttings.
Many claims about monster cropping stem from growing experience, forums, and practical articles. These include assertions such as:
There is currently a lack of reliable cannabis-specific comparative research for such sweeping rules.
Existing studies investigate, among other things:
These results help to understand individual parts of the method, but they do not automatically prove the common promises of monster cropping.
Monster cropping is aimed at healthy, photoperiod-sensitive cannabis plants.
The method can be particularly useful when:
Less suitable are:
The clone not only preserves the desired characteristics of its genotype; it can also carry over pests, fungi, viruses, and other issues from the parent plant.
There is no scientifically defined, universally optimal week of flowering. In cultivation practice, relatively early flowering stages are often preferred because the shoots still possess more vegetative leaf mass and are less fixed in their reproductive state.
As flowering progresses, the starting conditions change:
A later cutting can still root and revegetate. However, the method usually becomes slower and more uncertain the further development and aging have progressed.
The crucial rule is therefore not "week two" or "week three," but rather: as early as possible, as soon as it becomes clear that the plant should be preserved.
A suitable flowering cutting should be healthy, vital, and free from visible pests or diseases. In practice, side shoots from less dominant areas of the plant are often chosen.
A sensible shoot possesses:
Large, dense inflorescences are not an advantage for rooting. They increase transpiration and microbial risk while the cutting has no roots yet.
A cutting is an open plant wound. Working hygienically reduces the risk of introducing pathogens directly into the vascular tissue.
Important factors are:
Especially when preserving valuable genetics, hygiene should not start only with in-vitro cultivation. Even a normal clone can carry pathogens through many subsequent generations.
A monster crop cutting often already carries small flower buds. Very large flower masses are burdensome for the unrooted cutting because they lose water and can create a humid microclimate.
In practice, therefore, a portion of the excess reproductive tissue is often reduced without removing all nodes and growth points. It is crucial that viable tissue remains from which new vegetative shoots can later emerge.
Removing too much can additionally weaken the cutting. Conversely, leaving too much flower material can:
The balance depends on the size, flowering stage, and condition of the respective shoot.
For cannabis cuttings, it is not just moisture that is important; the base of the cut also needs oxygen.
Suitable media can include:
A very dry medium will cause the cutting to dehydrate. A permanently water-saturated medium can lower oxygen content and promote rot.
The ratio of water-holding capacity to air pores is therefore more important than the simple statement that the medium should be as wet as possible. Further topics include drainage, root respiration, and substrate structure.
Unrooted cuttings cannot yet compensate for water loss via a functioning root system. Increased relative humidity initially reduces transpiration.
Air that is too dry can lead to the following:
Permanently extremely high humidity can, however, also be problematic:
What matters is not just an isolated humidity value, but the interplay of temperature, humidity, and VPD. After successful rooting, the plant should be gradually accustomed to more normal conditions.
Temperature influences enzyme activity, water loss, metabolism, and root formation. Temperatures that are too low slow down these processes. Temperatures that are too high increase evaporation and microbial pressure.
Temperature in the root zone is particularly important. Cold, wet substrate can hinder root formation just as much as overheated propagation containers.
A stable propagation climate is more important than frequent changes between hot, cold, dry, and very humid conditions.
Unrooted cuttings need light for their metabolism but should not be treated with the intensity given to a fully grown plant. Light that is too strong increases water loss before sufficient roots are present.
Relevant factors are:
A study with common medicinal cannabis cuttings showed that additional far-red light improved adventitious rooting in one out of two trials. However, it did not prove a universal far-red benefit and did not examine "monster crop" cuttings.
Far-red is therefore not a necessary monster cropping hack. A stable, appropriate light environment is more important than replicating a single spectral experiment.
Auxins play a central role in the formation of adventitious roots. Rooting products often contain synthetic auxins such as IBA or NAA.
Cannabis and hemp studies show that auxin treatments can improve rooting. At the same time, cultivars react differently. A concentration or mixture that works well for one genetic line may not be optimal for another.
More rooting hormone is not automatically better. Concentrations that are too high can damage tissue, promote unwanted callus formation, or impair root development.
For monster cropping, therefore:
The return to the vegetative phase does not necessarily begin only after rooting is completely finished. Light signals already act on the living shoot tissue. In practice, however, the cutting must first survive and develop sufficient roots before vigorous vegetative growth becomes possible.
Under a long light cycle, photoperiodically sensitive plants are directed back toward a vegetative state. Often, for a long time, very little appears to be happening at first.
Typical transition phases are:
This process can take significantly longer than just the rooting itself.
Re-vegging plants often form leaves that do not look like typical mature cannabis fan leaves.
Possibilities include:
These appearances are not automatically a sign of a genetic defect. They reflect the transition between reproductive and vegetative development.
Only when the plant forms several generations of normal leaves again and grows vigorously is the re-vegging largely complete.
The namesake "monster" growth likely arises from several factors:
This can lead to bushy, heavily branched growth. However, it does not have to occur with the same intensity in every clone and every genetic strain.
A monster crop clone is not permanently biologically "monstrous." After a long period of vegetation, training, and further cloning, subsequent generations can grow significantly more normally again.
Monster cropping is often described not only for preserving genetics but also as a training technique. The numerous shoots can create a wide plant and a densely filled canopy.
Possible advantages are:
The same structure can also have disadvantages:
Bushier does not automatically mean better. The architecture must fit the area, lighting, and airflow.
A re-vegged clone can form many shoots that can be distributed under a SCROG net. This allows for a wide area to be filled using a single genetic strain.
This works particularly well if:
However, monster cropping replaces neither low-stress training nor thoughtful canopy management. It merely provides a potentially heavily branched starting material.
For a classic Sea of Green, small, uniform clones with a short vegetative phase are often used. Monster crop clones are not always ideal for this because re-vegging and irregular branching can lengthen the process.
SOG thrives primarily on:
Monster cropping fits better into systems where individual plants are grown vegetatively for longer and trained wide. Use in SOG is possible, but not automatically efficient.
No.
The method can produce more side shoots and thus create a different plant architecture. However, more shoots do not necessarily mean more usable flower mass.
Yield still depends on:
A poorly controlled, overly dense monster crop clone can even yield less uniform flowers than a well-developed normal clone.
The method should therefore not be described as a yield booster. Its primary value remains genetic salvation and its unique architecture.
A clone generally possesses the same genotype as the parent plant. However, this does not mean that every subsequent plant will look exactly the same under all conditions or produce the same amounts of flowers and metabolites.
The visible phenotype arises from genetics and the environment. Differences can arise due to:
A monster crop clone preserves the genetic identity of the keeper. The unusual transitional form during re-vegging is not new genetics.
Since the clone possesses the same genotype, the genetic potential for cannabinoids and terpene profiles is preserved.
How strongly this potential manifests in the next cycle depends again on the environment and cultivation management. An identical clone can show variations under different conditions in terms of:
Monster cropping preserves the genotype, not the exact environment of the original grow.
A successfully revegetated plant can later be used as a mother plant. To do this, it should first return completely to stable vegetative growth.
Before taking further cuttings, it makes sense to check:
If you clone again too soon, you may end up with weak shoots that are still in transition.
One possible advantage is that you do not need to keep a mother plant for every variety as a precaution. This can save space.
However, the method merely shifts the effort:
Monster cropping can replace a mother room, but it is not a guaranteed way to save space or time.
For long-term, professional genetic preservation, in-vitro cultivation of cannabis is another option. This involves propagating or maintaining small pieces of tissue under sterile laboratory conditions.
In comparison:
For an unexpected keeper, monster cropping remains the most immediate rescue method. For larger genetic libraries, more structured preservation systems are often more reliable.
A cutting is not a sanitized copy. It can carry anything that is present on or in the original plant.
This includes:
Especially relevant is the Hop Latent Viroid, which can spread through vegetative propagation within a clone collection.
Extraordinary genetics are only valuable in the long term if they are also kept healthy. New or rescued clones should therefore be closely monitored and kept separate from existing mother plants.
A plant with male flowers, anthers, or recurring intersexuality in cannabis should not be kept as a keeper simply because of its aroma.
The clone adopts the same genetic background. If sexual instability was genetically favored, it may recur in later cycles.
Before preserving, distinguish between:
Monster cropping can save a phenotype, but it can also preserve undesirable genetic traits.
Yes. A photoperiodic plant from feminized cannabis seeds can be rooted as a flowering cutting and revegetated.
The term "feminized" refers to the expected sexual expression, not the ability to be cloned. Crucial factors are:
A genetically female plant remains genetically female as a clone. Environment or instability can still promote male structures, as with any other clone line.
Yes. Female photoperiodic plants from regular cannabis seeds can be preserved in the same way.
Regular seeds are particularly interesting for selection and breeding. Monster cropping can become useful if an exceptional female phenotype is noticed late and no backup is available.
Male plants can also be cloned vegetatively in principle. However, the term monster cropping is predominantly used in growing practice for flowering female cuttings.
For autoflowering seeds, monster cropping in the usual form is not recommended.
Autoflowering plants transition into flowering due to their genetically controlled aging program and cannot be reliably kept in the vegetative phase for a long time by using long days. Furthermore, a cutting retains approximately the developmental age of the original plant.
This means:
Autoflowering genetics from specialized breeders like Mephisto Genetics or Night Owl Seeds are therefore usually preserved via seeds and breeding populations, not via monster cropping clones.
There is no universal time frame. Even common cannabis cuttings are frequently evaluated in studies after about two to three weeks. A monster crop cutting requires additional time to return to vegetation.
The entire process can include:
Depending on the genetics and the flowering stage, several weeks may pass before vigorous vegetative growth occurs.
Monster cropping is therefore not suitable for a schedule where every day must be precisely calculated.
Visible roots are the clearest signal. Depending on the medium, however, they are not immediately recognizable.
Other indications can include:
A green cutting is not automatically rooted. Flowering shoots can live off stored reserves for a long time without forming a functional root system.
A successful re-veg is not just shown by the cutting surviving.
Typical signals include:
Only once leaf and shoot growth is stable and vigorous should the plant be treated like a normal veg clone.
Possible causes include high transpiration, dry air, damaged cuts, or overly intense lighting.
Possible causes include lack of oxygen, rot, dirty tools, or the medium being too wet for too long.
The tissue can survive for a long time without successfully developing adventitious roots. Genetics, development phase, and propagation conditions play a role here.
During re-veg, this is initially normal. The decisive factor is whether vigorous, multi-fingered growth returns later.
After successful recovery, the plant can be thinned out and structured using topping, LST, or a net.
Stress and genetic susceptibility should be checked. A plant with recurring intersex traits may not be a worthwhile keeper.
Common mistakes include:
Monster cropping rewards patience and close observation. Quick fixes and constantly changing conditions usually do not make the method more successful.
The technique is particularly suitable for growers who:
It is less suitable for:
This method does not have to be the standard for every grow. Taking backup cuttings before flowering ensures genetics are obtained more quickly and predictably.
Monster cropping is particularly valuable when regular planning hasn't taken place:
In such cases, the technique can save genetics that would otherwise vanish with the harvest.
Monster cropping is a propagation technique where cuttings are taken from an already flowering, photoperiodic cannabis plant, rooted, and returned to the vegetative phase under a long-day photoperiod.
No. Normal clones are usually taken during the vegetative phase. Monster crop cuttings come from the flowering phase and must additionally re-veg.
Monster cropping includes a re-veg phase. In classic re-vegging, the entire original plant is often brought back into the vegetation stage. In monster cropping, this is done with a detached flowering cutting.
The name refers to the unusually bushy and heavily branched growth that some re-vegged flowering cuttings develop.
No. Monster cropping is a term from the grow community. The individual biological processes – cutting rooting, photoperiod change, and re-vegging – are scientifically describable, but the technique as a whole has hardly been directly studied.
The most important advantage is the retrospective preservation of an interesting phenotype when no vegetative backup clone was secured before the start of flowering.
No. The method can produce a heavily branched architecture. Whether this results in more yield depends on genetics, light, canopy, vegetation time, root space, and cultivation management.
They may react slower or more unevenly than vegetative cuttings. The developmental state of the tissue influences adventitious rooting. However, cannabis-specific comparative data on monster cropping is limited.
Standard cannabis cuttings are often monitored for two to three weeks. With monster cropping, a variable-length re-veg phase is added afterwards.
This depends heavily on genetics, flowering stage, and conditions. It can take several weeks before normal, vigorous vegetative growth returns.
Such leaves are typical transition forms during the return from reproductive to vegetative development. They are not automatically a deficiency or a mutation.
There is no scientifically verified universal week. In practice, earlier flowering shoots are usually easier to reverse than highly mature and senescent shoots.
Yes. The crucial factor is that the plant is photoperiodic. The feminized seed format does not prevent clonal propagation.
Yes. Female photoperiodic plants from regular seeds can also be preserved as flowering cuttings.
Not in the usual form. Autoflowers follow an age-dependent flowering program and cannot be reliably returned to a sustained vegetative phase using long-day lighting.
Not strictly, but auxin products can support root formation. The effect is cultivar-dependent, and high dosages are not automatically better.
One study found a positive effect in one of two tests with regular cannabis cuttings. This is no evidence that Far-Red is necessary or universally effective for monster cropping.
Yes. It should first fully re-veg, grow normally again, and be checked for health and sexual stability.
The clone has the same genotype as the parent plant. Environment, developmental phase, and health status can still influence the visible phenotype.
The genetic potential is preserved. The actual expression in the next run will again depend on light, climate, nutrient supply, harvest time, and post-harvest.
Yes. Since the method is less predictable than normal cloning, several clearly labeled cuttings increase the chance of successfully securing the genetics.
Monster cropping is best understood as an advanced rescue and propagation technique. A flowering cutting is rooted and subsequently led back into vegetative development under long-day conditions. This allows a specific phenotype to be preserved even if no backup clone was taken before flowering.
The method can produce unusually branched plants and can be interesting for SCROG or individual architecture work. However, no guaranteed yield advantage can be derived from it. Flowering cuttings often require more time, react differently based on genetics, and undergo a noticeable transition phase during re-veg.
The actual value of monster cropping does not lie in the promise of monstrous plants, but in the second chance for genetics. If an extraordinary keeper only becomes visible during flowering, an inconspicuous flowering cutting can ensure that its genotype is not lost with the harvest.