Dry leaves around buds can be a sign of a variety of internal or external factors that alter the structural health of the flower. Although in some cases it is a natural process during advanced stages of flowering, its excessive or anticipated presence is often linked to imbalances in the growing environment. For growers, understanding the possible causes behind this phenomenon and how to prevent it can make all the difference in the final development of CBD flowers.
Irrigation and nutrients in hemp crops
In this section we address two of the most determining factors for the hydration and nutrition of flowers: watering and the use of fertilizers. When not properly managed, they can trigger visible signs such as drying leaves, starting with the areas near the bud.
Underwatering or overwatering of the roots
One of the most frequent triggers of premature drying of leaves is improper irrigation management. When the substrate remains dry for prolonged periods, water stress occurs, which disrupts essential processes such as photosynthesis. As a result, the leaves near the bud may lose firmness, have brittle edges or take on a brown colour. This dryness not only affects the visual appearance, but also compromises temperature regulation and the overall health of the plant.
On the contrary, an excess of irrigation can lead to anaerobic conditions, that is, a lack of oxygen in the root zone. This situation hinders the absorption of nutrients, generating symptoms such as yellowing, leaf weakness and, over time, progressive drying of the foliage. Looking at the weight of the pot, the texture of the substrate, and the rate of absorption can offer clues as to whether watering is being balanced.
Excess fertilizers and buildup in the substrate
Another relevant factor is the excessive use of fertilizers. The overload of nitrogen, phosphorus or potassium, especially in sensitive phases of flower development, generates accumulations of salts in the substrate. This saturation prevents a balanced assimilation of minerals, which produces what is commonly called “nutrient burn”: a progressive necrosis that begins at the tips and edges of the leaves.
This type of damage is usually first seen as a change in color, going from a deep green to a yellowish or brown hue. The affected tissue then dries out and becomes brittle. To avoid this, many people dedicated to cultivation choose to apply fertilizers in moderate doses, slightly below what is recommended by the manufacturers, especially in soils that have already been previously enriched.
Environmental stress in hemp flowers
In addition to water and nutritional management, environmental conditions can also directly affect the vitality of flowers and the appearance of nearby leaves. Two common factors are explored here: climate (temperature and humidity) and light exposure.
Temperatures and humidity outside the recommended range
Environmental conditions directly influence the appearance of dry leaves. Excessively high temperatures, coupled with too low humidity levels, often accelerate the dehydration of plant tissue. In these scenarios, leaf transpiration increases, depleting their water reserves more quickly and causing a visible loss of turgor.
For example, in indoor spaces without climate control, an unexpected increase in temperature can generate a dry environment that forces the plant to release more water to stay cool. If this process is not compensated by adequate relative humidity, the leaves begin to deteriorate. This loss of water balance is especially visible in the leaves that surround the buds, due to their more exposed position.
Excessive direct light on flowers or buds
In addition to temperature and humidity, light intensity can have a direct impact on the most delicate leaves. Prolonged exposure to intense light sources, both indoors and outdoors, can cause what is known as light stress. The leaves that protect the buds, especially in the upper areas of the plant, tend to dry out when exposed unprotected at peak radiation hours or when the lamps are poorly positioned.
This type of damage can be prevented by adjusting the distance between the lamps and the plant canopy in indoor systems, or by providing partial shade during the hours of strongest sun outdoors. This prevents burns from too much light and protects the structure of the flower.
Pests and fungi that damage buds
The growing environment can not only be altered by physical variables, but also by biological agents. Pests and fungal infections pose common threats that can manifest themselves in the form of dry or damaged leaves, affecting both their appearance and health.
Visible signs on affected leaves and flowers
The presence of insects or fungal diseases is directly related to the abnormal drying of the leaves. For example, mites such as spider mites affect the plant’s ability to transport water and nutrients evenly. Its damage manifests itself in the form of light spots that quickly turn brown and brittle.
These signs usually appear first on the underside of the leaves and, if not controlled in time, can spread to areas near the bud. Another common case is that of mildew, a fungus that compromises the health of the foliage by covering the leaves with a whitish coating that prevents them from breathing properly. When this happens near the flowers, the impact is greater, as it interferes with the formation and density of the buds.
Control and prevention with frequent monitoring
In the face of this type of threat, the essential thing is to implement regular controls. Detailed observation of foliage with tools such as magnifying glasses and early detection of spots, fine cobwebs, or strange dusts can be the key to preventing worse conditions. In addition, many people use biological or preventive treatments with specialized products or even with other beneficial organisms.
Maintaining the cleanliness of tools, avoiding contact between affected and healthy specimens, and ensuring constant ventilation are also part of the strategies to reduce the risk of infestations and fungal outbreaks.
What to do if there are already dry leaves on the buds
When leaf drying has already manifested, it is still possible to intervene to limit the damage and promote the recovery of the growing environment. This section describes specific actions depending on the type of cause detected.
Adjust watering and remove fertilizer residues
First of all, it is advisable to adjust the irrigation by using water without fertilizers for a few cycles. This practice, known as substrate washing, helps to remove accumulated excess and restore a more balanced environment. In turn, it is recommended to check the aeration and drainage of the pot to avoid future episodes of accumulation.
In some cases, this measure can be complemented with the addition of microorganisms that improve the microbial life of the soil, favoring a more efficient absorption of nutrients and a gradual recovery of the root system.
Improve temperature, humidity and ventilation
It can also be helpful to review environmental conditions and make timely adjustments. Maintaining the temperature between 20°C and 26°C, and a relative humidity of 50% to 60%, is usually favorable for recovery. These values allow the leaves to maintain their ability to perspire without dehydration, and for the bud to retain its structure without the risk of abnormal drying.
In indoor crops, modifying the distance of the lamps or using diffuser screens can reduce the light impact in the affected areas. Increasing ventilation without generating direct currents also helps stabilize the microclimate and prevent conditions conducive to disease.
Apply specific pest treatments
In cases where pests or diseases are detected, immediate treatment with specific biological products is the safest route. The choice of product will depend on the type of agent involved, and should be applied following the manufacturer’s instructions so as not to damage sensitive tissues.
In addition, cleaning tools, removing heavily affected parts, and separating compromised specimens help contain the spread. These measures, although simple, are essential to restore the balance of the crop without the need to resort to aggressive methods.
How to prevent dry leaves on buds
Uniform irrigation, with adequate volumes and good oxygenation of the substrate, significantly reduces risks. Instead of applying water according to a fixed routine, many people choose to look at physical cues, such as the weight of the pot, the appearance of the substrate, or the turgor of the leaves.
Also, using moderate doses of fertilizer can minimize buildup. This practice is especially useful in soils with a history of continuous fertilization or in stages where the flower requires a finer balance of nutrients.
Constantly monitoring the environment is another essential element. Devices such as thermohygrometers, substrate moisture meters, or potting scales can facilitate informed decision-making. In addition, periodic visual inspections allow early detection of pests, spots, burns or any anomaly in the flower.
Conclusion: Healthy Flowers with Proper Follow-Up
Premature drying of leaves around buds can be the result of multiple interrelated factors. Watering, nutrition, environmental conditions and biological threats act together on the health of the flower. Understanding the interaction between these elements allows us to anticipate problems and act before the damage is irreversible.
With constant monitoring, subtle adjustments, and informed decisions, it is possible to preserve the structure and healthy development of hemp during all its stages. Observation, more than a routine task, becomes the most valuable tool to ensure robust and balanced flowers.
At Maionais, each CBD flower is verified to ensure its integrity, appearance, and structure. This level of demand allows you to choose buds carefully selected for their quality, and offer them at the best price.
References
- Jin, D., Jin, S., & Chen, J. (2019). Cannabis indoor growing conditions, management practices, and post-harvest treatment: A review. American Journal of Plant Sciences, 10(6), 1067.
