Foliar fertilizer application rates and recommendation for the coconut palm

The coconut palm – 

(Cocos nucifera) is a versatile fruit-bearing tree belonging to the Arecaceae family, the sole member of the genus Cocos. This majestic palm can reach impressive heights of up to 30 meters. With a slender trunk ranging from 15 to 45 centimeters in diameter. The coconut palm’s fruit, aptly named the coconut, typically measures between 15 and 30 centimeters in length and weighs approximately 1.5 to 2.5 kilograms. The coconut palm traces its roots to the tropical and subtropical regions of Southeast Asia, particularly Malaysia, and Oceania. This coastal plant thrives in sandy soils, often gracing coastal coral strips, atolls, and areas where other vegetation struggles to survive.

The global coconut production stands at around 61 million tons annually.
The Philippines, Indonesia, India, Sri Lanka, and Thailand are the leading coconut producers.

The coconut palm flourishes best in tropical environments with average annual temperatures. Ranging from 27°C to 32°C and annual rainfall between 1500 and 2500 millimeters. It requires well-drained soil with a pH between 5.0 and 8.0 and high air humidity (70-80%). Coconut palms thrive in coastal areas due to their tolerance for saline soil and wind exposure. The soil should be well-drained, light, and sandy to prevent waterlogging. Coconut palms also adapt well to sandy or deep sandy soils that provide good drainage.

Coconut palms benefit significantly from foliar fertilization,

a technique that involves applying nutrients directly to the leaves. This method allows for rapid nutrient uptake, enabling the plant to respond promptly to nutrient deficiencies compared to traditional root fertilization. 

During the initial growth stages of coconut palms, falling within the BBCH 31-39 (Stem Elongation) phase, ensuring the supply of essential nutrients is crucial for optimal growth and development. Nitrogen (N) stands as the most critical element during this stage. As a constituent of plant cells and chlorophyll, N plays a pivotal role in driving rapid growth and plant development. 

Therefore, we recommend using foliar fertilizers for coconut palms, such as Wonder Leaf Grass (10:5:3) at an application rate of 4-5 liters per hectare. This NPK fertilizer provides a balanced supply of nutrients. With a focus on nitrogen to support vigorous stem elongation and leaf growth. Additionally, it is important to apply fertilizers containing zinc. As zinc helps plants cope with various stressful conditions like excessive moisture or drought, which may occur in coconut plantations. We recommend using Wonder Leaf Mono Zn 8, which contains 8% chelated zinc, at an application rate of 1-2 liters per hectare.

Copper (Cu) and iron (Fe) are essential micronutrients that play pivotal roles in maintaining optimal coconut palm health and productivity. These micronutrients are involved in various enzymatic processes and physiological functions within the plant, including photosynthesis and respiration. Deficiencies in copper and iron can lead to severe consequences for coconut palms, including leaf drying, yellowing, and reduced yield.

To ensure adequate iron supply for your coconut palms,

we recommend incorporating Wonder Leaf Mono Fe 10 into your foliar fertilization program. This concentrated iron fertilizer contains 8.8% chelated iron, making it readily available for efficient nutrient uptake by the plant. Apply Wonder Leaf Mono Fe 10 at a rate of 0.5-1 liters per hectare to effectively address iron deficiencies and promote healthy coconut palm growth.

For optimal copper nutrition in your coconut palms, we suggest using Wonder Leaf Mono Cu 6. This copper fertilizer contains 6% chelated copper, ensuring a targeted boost of this essential micronutrient. Apply Wonder Leaf Mono Cu 6 at a rate of 1-2 liters per hectare to prevent copper deficiencies and maintain overall coconut palm health. 

Foliar feeding of coconut palms typically involves sprayers that evenly distribute the copper and iron solution on the leaves. We recommend combining it with the spreader-sticker Wonder Aqua True Cover. An adjuvant with a water-lipid base that helps the solution absorb more effectively and stay on the leaf surface longer.  It is important to perform treatments in the morning or evening to avoid rapid evaporation of the solution due to sunlight.

Humic acids play a crucial role in improving soil structure and nutrient availability,

making essential elements more accessible to coconut palms. Their ability to chelate nutrients and form complexes with micronutrients facilitates efficient nutrient uptake by the plant.

Nitrogen (N), phosphorus (P), and potassium (K) are the fundamental macronutrients that drive healthy coconut palm growth and development. Together, they create optimal conditions for healthy growth and fruiting. 

Wonder Humic NPK combines the benefits of humic acids with the essential macronutrients NPK, providing a comprehensive solution for optimal coconut palm nutrition. This unique fertilizer contains 15% organic matter, including 10% humic acid extract and 5% fulvic acid extract. Additionally, it is enriched with potassium, phosphorus, nitrogen, and plant-derived amino acids. The application rate for foliar feeding is 150-300 ml/ha, and for soil feeding, it is 5-10 liters/ha.

During the crucial flowering stage of a coconut palm. Which falls within the BBCH 51-59 phase, ensuring adequate boron supply is critical.  This essential micronutrient plays a vital role in pollen germination, pollen tube development, fruit set, and overall palm growth.  We recommend using Wonder Leaf Pink (20% boron, application rate of 0.5-1 kg/ha), Wonder Leaf Mono B 11 (11% boron, application rate of 1-2 liters/ha), and Wonder Leaf Mono B 120 (9% boron, application rate of 1-2 liters/ha).

As coconut palms transition into the BBCH 67-69 phase (End of Flowering, Ovary Visible). Their nutritional requirements shift towards a balanced supply of NPK (nitrogen, phosphorus, and potassium). Nitrogen promotes green growth and leaf development, phosphorus is involved in root and fruit formation, and potassium strengthens stems and improves fruit quality. We recommend using Wonder Leaf Yellow (21:21:21, application rate of 2-4 kg/ha), Wonder Leaf Macro (10:10:10, application rate of 4-5 liters/ha), and Wonder Leaf Violet (30:10:10, recommended dose of 2-4 kg/ha).

At this stage, fertilizers with amino acids are also quite important.

They help in better fruit formation and quality. Amino acids, the building blocks of proteins, play a vital role in plant growth and metabolism. Therefore, we advise using foliar fertilizers for coconut palms such as Wonder Leaf Green. It containing 15% plant-derived amino acids, with an application rate of 0.5-1 kg/ha, and Wonder Leaf Amino 43, this concentrated amino acid fertilizer provides a high dose of amino acids (43%), with an application rate of 0.5-1 l/ha.

As coconut palms progress into the fruit and seed development stage (BBCH 71-79). Ensuring an adequate supply of potassium becomes paramount. This element is the most crucial nutrient for coconut palms and plays a significant role in physiological processes. Potassium is necessary for the formation of sugar, fat, and fibrous material. We recommend using Wonder Leaf Mono K 30, which contains 30% potassium, at an application rate of 1-2 liters per hectare, and Wonder Leaf Blossom, which contains 7% potassium, at an application rate of 4-5 liters per hectare.

Calcium plays a crucial role in strengthening cell walls. Improving membrane permeability, and regulating enzymatic activity. All of which contribute to enhanced stress tolerance and disease resistance in coconut palms. Calcium strengthens cell walls and enhances the plant’s defense mechanisms. Providing physical and chemical barriers against pathogens and environmental stress factors. The best option is to fertilize coconut palms with Wonder Leaf Ca 14 at a rate of 1-2 liters per hectare and Wonder Leaf CaO+B at a rate of 1-2 kg per hectare.

Following harvest, coconut palms have a heightened need for phosphorus.

This essential nutrient plays a critical role in stimulating root system development, increasing disease resistance, and promoting better fruiting in the next cycle. We recommend using Wonder Leaf Mono P 30, which contains 30% phosphorus, at a recommended rate of 1-2 liters per hectare.

In conclusion, adopting a tailored nutrient management strategy that considers the specific needs of coconut palms at each growth stage is essential for optimizing fruit and seed development.
The cultivation of coconut palms demands meticulous attention to detail, adherence to optimal growing conditions, and a commitment to nurturing these valuable plants. As the demand for coconut products continues to rise, the coconut industry presents exciting opportunities for growth and sustainability.