Seaweed extract or seaweed fertilizer is derived from various types of seaweed or marine algae, is a valuable and versatile agricultural input used in crop cultivation. It contains a range of beneficial compounds, including plant growth regulators, trace elements, amino acids, vitamins, and carbohydrates. 
 
 
Benefits of seaweed extract:
Bioactive Compounds:
Seaweed fertilizer contains bioactive compounds like auxins, cytokinins, gibberellins, betaines, mannitol, and alginates. These compounds can have positive effects on plant growth and development.
Plant Growth Promotion:
It is known for promoting root development, increasing nutrient uptake, and enhancing overall plant growth. It provides plants with essential growth stimulants.
Stress Tolerance:
The application of seaweed fertilizer is believed to enhance the stress tolerance of plants, making them more resistant to various environmental stressors such as drought, salinity, and temperature extremes.
Nutrient Content:
Seaweed fertilizer is a rich source of trace elements (micronutrients) such as iron, zinc, manganese, and copper. It also contains vitamins and amino acids, contributing to plant health.
Improved Yield and Quality:
The use of seaweed extract has been associated with increased crop yields and improved quality of harvested produce. It can enhance the nutritional content of fruits and vegetables.
Biostimulant Properties:
It is often categorized as a biostimulant, a substance that promotes plant growth, nutrient uptake, and stress resistance. Biostimulants are used to complement traditional fertilizers.
Seed Treatment:
It can be applied as a seed treatment or seedling dip to promote uniform germination, enhance seedling vigor, and improve early plant development.
Foliar Application:
Foliar sprays of seaweed extract are commonly used to deliver nutrients directly to the leaves, promoting quick absorption and utilization by plants. This can be especially beneficial during critical growth stages.
Organic Farming:
Seaweed fertilizer is often favored in organic farming practices as it aligns with principles of sustainability and environmental friendliness. Many seaweed manure are OMRI (Organic Materials Review Institute) listed.
Soil Health:
It can contribute to improved soil structure and microbial activity, promoting a healthy and balanced soil environment for plant growth.
 
It's important to note that the effectiveness of seaweed extract can vary depending on the type of seaweed, extraction methods, and specific crop requirements. Application rates and timing should be based on agronomic practices and the developmental stage of the crops. As with any agricultural input, it's advisable to follow recommended guidelines for sustainable and responsible use.
 
How to use seeweed fertilizer?
 
1. Dilution:
Seaweed manure is often concentrated, so it needs to be diluted before application. Follow the manufacturer's instructions for the recommended dilution rates. Common rates range from 1:100 to 1:500 (1 part seaweed fertilizer to 100 or 500 parts water).
2. Application Methods:
Foliar Spray: Mix the diluted seaweed fertilizer with water and spray it directly onto the leaves of plants. This allows for quick absorption of nutrients through the plant's stomata. This method is particularly useful for providing a quick boost during periods of stress or rapid growth.
Soil Drench: Apply the diluted seaweed manure directly to the soil around the base of the plants. This method allows the roots to absorb the beneficial compounds over time, promoting overall plant health and nutrient uptake.
Seed Soaking: Soak seeds in a diluted seaweed fertilizer solution before planting. This can enhance germination rates and provide seedlings with an early boost of nutrients.
3. Timing of Application:
Apply seaweed extract during the growing season, especially during critical growth stages such as seed germination, transplanting, flowering, and fruiting.
For foliar applications, it's often recommended to spray in the early morning or late afternoon when the stomata are open, allowing for better absorption.
4. Frequency:
Regular applications, typically every 2 to 4 weeks, can provide continuous benefits. However, follow specific product recommendations for the best results.
Adjust the frequency based on the needs of the plants and the specific growth stage.