TOPPING AND SUCKER CONTROL
Redirecting the Plant’s Growth
Up to this point, we have followed a tobacco plant that has been continuously building itself.
It established its roots, developed its stalk, produced new leaves, and gradually occupied its place in the field.
But eventually, something changes.
At the top of the plant, a new structure begins to appear.
The flower head is forming.
Its appearance tells us that the tobacco plant is entering a different stage of its life cycle.
If we simply allowed the plant to continue without intervention, those flower buds would develop, open into flowers, and eventually contribute to seed production.
There is nothing unusual about this.
The plant is doing exactly what it is biologically designed to do: reproduce.
But when tobacco is being grown primarily for its leaves, the grower has a different objective.
And this is where one of the most important management practices of this stage begins:
topping.
From this point forward, the question is no longer simply how to keep the plant growing.
The question becomes:
Where do we want that growth to go?
1. When the Flower Head Appears
For much of its time in the field, the tobacco plant has been primarily building vegetative structures: roots, stalk, and leaves.
Eventually, however, it begins the transition toward reproduction.
At the upper end of the stalk, the flower head starts to emerge.
At first, it may look like a compact cluster of small, tightly closed buds.
As development continues, the flower structure expands, the buds become more distinct, and eventually the flowers begin to open.
For the grower, this is an important visual signal.
The plant itself is announcing that it has entered a new phase.
The appearance of the flower head is not a problem or a sign that something has gone wrong.
It is a normal part of the tobacco plant’s biological cycle.
What has changed is the relationship between what the plant naturally wants to do and what the grower wants the plant to produce.
2. Flowering Changes the Plant’s Priorities
Once flowering begins, the plant is moving toward reproduction.
Developing and maintaining flowers—and eventually producing seed—requires resources.
Water, nutrients, and the products of photosynthesis continue moving through a plant that now has reproductive structures to support.
When the agricultural objective is the leaf, allowing that reproductive development to continue unchecked creates competition for resources that could otherwise contribute to the remaining parts of the plant.
But there is an important distinction here.
It is tempting to say that topping simply makes “all the plant’s energy go to the leaves.”
That is useful as a basic illustration, but the physiology is more complex.
The plant continues maintaining its roots, transporting water, producing new compounds, respiring, and responding to its environment.
Topping does not flip a switch that sends everything in one direction.
Instead, it removes an important reproductive growing point and changes the way growth and resources are distributed throughout the plant.
That distinction will help us understand everything that happens next.
3. What Is Topping?
Topping is the removal of the flower head from the upper portion of the tobacco plant.
Depending on the type of tobacco, the production system, the variety, and the timing of the operation, some of the upper leaves may also be removed along with it.
From a distance, the procedure looks remarkably simple.
The grower reaches the top of the plant, removes the terminal portion, and moves on.
But agronomically, much more has happened.
We have not simply removed a flower.
We have removed the plant’s dominant growing point.
And the plant will respond.
4. Why Is Tobacco Topped?
If the flower head remains, the plant will continue investing resources in reproductive development.
When the crop is being managed primarily for leaf production, however, developing flowers and seeds is no longer the grower’s priority.
Removing the flower head changes that relationship.
The leaves remaining on the stalk can continue developing without the same reproductive structure competing for resources.
Topping can influence leaf development, root growth, and the accumulation of certain compounds within the plant.
That is why its purpose should not be reduced to simply “making bigger leaves.”
Its effects depend on several factors: when topping occurs, how many leaves remain, the variety being grown, environmental and field conditions, and the characteristics desired in the final leaf.
Two tobacco plants may both be topped and still be managed differently.
Because the goal is not merely to top a plant.
The goal is to manage it according to the leaf we are trying to produce.
5. Timing Matters
One of the most important decisions is when to top.
Some plants may only be beginning to show the flower bud.
Others may have a clearly developed flower head.
Still others may already have open flowers.
These stages are not equivalent.
Waiting longer allows the plant to invest more time and resources in reproductive growth.
But earlier does not automatically mean better.
The appropriate timing depends on the tobacco type, variety, crop uniformity, desired number of leaves, and production objective.
There is another complication.
Plants within the same field do not necessarily reach the same developmental stage on the same day.
A grower therefore cannot rely only on the calendar.
The field has to be observed.
More importantly, the plant has to be read.
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6. How High Should the Plant Be Topped?
Topping creates another important decision:
How many leaves should remain?
Removing the upper portion of the plant also determines how many leaves will continue toward maturity.
A lower topping height leaves fewer leaves on the stalk.
A higher topping height leaves more.
But more leaves do not automatically mean a better result.
The plant has a limited capacity to support the structures that remain on it.
Leaving more leaves changes how resources are distributed among them.
Leaving fewer changes the balance in another direction.
For that reason, topping height is part of a production strategy.
There is no single number of leaves that can be applied universally to every tobacco variety, every region, and every production objective.
The decision has to reflect both the plant being grown and the characteristics expected from its leaves.
7. Removing the Top Triggers Another Response
At this point, it might seem that the job is finished.
The flower head is gone.
Reproductive growth has been interrupted.
The remaining leaves can continue developing.
But something else begins to happen.
Before topping, the active growing point at the top of the plant exerted what is known as apical dominance.
In simple terms, the terminal growing point helped suppress the development of other potential growing points located farther down the stalk.
Once that top is removed, the hormonal balance within the plant changes.
Structures that had previously remained relatively inactive can now begin to grow.
These are the axillary buds.
8. Axillary Buds Become Suckers
At the point where a leaf joins the stalk—the leaf axil—there is a bud capable of producing new growth.
While apical dominance is intact, many of these buds remain relatively suppressed.
After topping, that suppression is reduced.
The buds begin to grow.
The shoots that emerge are commonly called suckers.
And this creates an interesting situation.
We removed the flower head partly to prevent reproductive growth from competing with the leaves.
But by removing the terminal growing point, we also stimulated another form of growth that can become a competitor.
Topping therefore does not finish the management process.
It creates the need for the next one:
sucker control.
9. What Happens If Suckers Are Allowed to Grow?
A sucker is not simply a small bump on the stalk.
If allowed to continue developing, it can form its own stem and leaves and eventually produce reproductive structures of its own.
All of that growth requires resources.
As suckers become larger, the plant must support structures that are not part of the grower’s primary production objective.
The longer they grow, the greater their potential competition becomes.
Larger suckers can also become more difficult and labor-intensive to remove.
This is why sucker control should not be viewed as an unrelated operation that happens sometime after topping.
The two practices are biologically connected.
Topping changes the plant.
Sucker control manages part of the plant’s response to that change.
10. Removing the Suckers
The process of controlling these lateral shoots can be performed manually.
Workers move through the field, identify suckers developing in the leaf axils, and physically remove them.
The concept is straightforward.
The practical challenge is that removing one sucker does not necessarily mean the plant has finished producing lateral growth.
New growth may appear again.
For that reason, relying entirely on manual removal can require repeated passes through the field.
When multiplied across thousands of plants, a small task performed on one stalk becomes a significant amount of labor.
That challenge is one reason different sucker-control methods have developed.
11. Different Methods of Sucker Control
Manual removal is one option.
In some production systems, growers may also use products specifically intended to suppress or control sucker growth.
These products do not all work in exactly the same way.
Some act primarily through direct contact with young sucker tissue.
Others can provide localized activity after reaching the areas where the buds are developing.
Certain systemic growth regulators may also be used within appropriate sucker-control programs.
The important point is not to memorize a list of products.
It is to understand that different methods act differently and therefore require different management.
Approved products, application methods, rates, timing, residue requirements, and regulations can vary considerably between countries and production systems.
Chemical sucker control should therefore be understood as one agronomic tool—not as a replacement for understanding what is happening inside the plant.
12. Timing Matters Again
Timing becomes critical once more.
A sucker that has only begun to emerge is very different from one that has already grown several inches.
Some control methods, particularly contact approaches, depend heavily on reaching young, actively developing tissues.
Allowing suckers to become too large can reduce the effectiveness of a management strategy or require a different approach.
So topping cannot be followed by simply walking away.
The field must be revisited.
Leaf axils must be examined.
The grower has to see how individual plants are responding.
The management process continues after the flower head is removed.
13. Topping and Sucker Control Work Together
We can now see why topping and sucker control are usually discussed together.
Topping without subsequently managing sucker growth can reduce part of the benefit the grower was trying to achieve.
And discussing sucker control without understanding topping would leave out the biological reason those shoots become so important.
The sequence tells the story:
The plant approaches reproduction.
The flower head emerges.
The terminal growing point is removed.
Apical dominance is disrupted.
Axillary buds respond.
Suckers begin to grow.
And that new growth must be managed.
These are not isolated operations.
They are connected responses within the same living plant.
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14. What Does This Mean for the Leaf?
Ultimately, everything comes back to the leaf.
By limiting reproductive growth and controlling unwanted lateral shoots, the grower changes the conditions under which the remaining leaves continue developing.
But the result cannot be measured only by leaf size.
Topping and sucker control can influence both physical and chemical characteristics of tobacco leaves.
This is precisely why more aggressive management does not automatically produce better tobacco.
There is a balance to be found.
And the leaf that eventually reaches maturity will reflect, in part, the decisions made during this stage.
15. Management Depends on the Production Objective
This becomes particularly important when we think about tobacco intended for premium cigars.
Not every leaf is being produced for the same purpose.
A leaf intended for wrapper must meet certain physical expectations.
Binder leaves are selected according to different requirements.
And filler leaves can be valued for still other characteristics.
Variety, leaf position, environment, and production practices all interact with those objectives.
That is why there cannot be one universal topping strategy for every tobacco field.
Topping height, timing, and sucker management must be considered in relation to the production objective.
Instead of asking only:
“When should I remove the flower?”
A more useful question is:
“What kind of leaf am I trying to produce, and how should this plant be managed to move toward that objective?”
16 Redirecting Growth Does Not Mean Controlling Everything
The grower can influence the plant.
A variety can be selected.
Plant population can be managed.
Water and nutrition can be adjusted.
Crop health can be protected.
The plant can be topped.
Suckers can be controlled.
But neither the plant nor its environment can ever be controlled completely.
Tobacco remains a living organism responding continuously to its genetics, soil, weather, and every management decision made throughout the season.
That is why topping should not be imagined as a switch that sends all of the plant’s energy in one direction.
It is an intervention that changes the plant’s physiological balance.
And once that balance changes, the plant’s response must be observed.
17. A Small Action With Effects That Continue
Watch someone topping tobacco from a distance and the movement lasts only a few seconds.
The upper portion is removed.
The worker moves to the next plant.
It looks simple.
But that brief action influences what happens afterward.
Axillary buds respond.
Suckers emerge.
Those suckers must be managed.
Meanwhile, the leaves that remain on the stalk continue changing.
And eventually, another transition begins.
The grower will no longer be asking primarily how to direct the plant’s growth.
The question will become how to recognize what is happening as the leaf approaches maturity.
That is the next stage of our journey.
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Closing
Today we saw how the appearance of a flower can change the way an entire tobacco plant is managed.
The flower head signals the beginning of reproductive development.
Topping interrupts that development and changes the plant’s growth balance.
That change encourages axillary buds to develop, creating the need for sucker control.
Two different operations.
One connected biological process.
And behind both lies the same principle:
guiding the plant’s development according to the kind of leaf we are trying to produce.
It is not simply about removing flowers.
And it is not simply about removing shoots.
It is about understanding how the plant responds to every decision made in the field.
Long before a tobacco leaf enters a curing structure, reaches a factory, or becomes part of a premium cigar, its story is already being shaped in the field.
In the Cigar Culture section of Imperium Cigars, you can continue exploring that story step by step and learn more about what happens behind the leaf before it ever becomes part of a premium cigar.
Coming Next...
The plant has reached another turning point.
Its leaves are no longer simply expanding and developing.
Gradually, they begin to change.
But maturity is not determined by size alone, and it does not arrive in exactly the same way throughout the plant.
In the next chapter, we will learn how tobacco leaves progress toward maturity, what changes growers look for, and why recognizing the right stage requires much more than simply looking at the color of a leaf.
Next: Leaf Maturation.
From the Seed to the Humidor
From a seed barely visible to the eye, the plant has now passed through establishment, growth, crop management, flowering, topping, and sucker control.
Each stage has changed what comes next.
Now the leaf itself begins to tell us that another transition is approaching.
And understanding those signals will prepare us for the next step in its journey.