Biostimulants’ legal definition has yet to be decided. Yet, it can be define as.

Substances and/or microorganisms that will stimulate all natural processes in plant growth. If it’s applied directly to the plant, it will increase its nutrient uptake and utilization. That will result in higher tolerance to abiotic stresses. And will improved crop quality.

In recent years, biostimulants have sparked an interest with many crop producers. With these products getting more attention, we find there is much to debate on their effectiveness. 

(https://blog-crop-news.extension.umn.edu/2018/12/biostimulants-what-are-they-and-do-they.html)

The use of biostimulants can start in the seed germination phase and continue throughout the plant’s life cycle.

In order for plants to develop properly, they should absorb nutrients efficiently. Biostimulants can enhance the plants’ ability to do it. To improve microbial population, it should be added to the soil. And these can help a plant’s roots thrive and form a beneficial symbiotic relationship.

MaximumYield – explains Biostimulants

• Strengtheners
• Conditioners
• Enhancers
• Phytostimulants
• Bioactivators.

They should all be derived from natural and biologically ingredients.

The benefits that plant get from it are,

• Higher yields
• Stronger growth
• Enhanced water absorption
• Better appearance
• Improved tolerance for heat, cold, and transplanting

Depending on the manufacturer, biostimulants can contain a large group of biological ingredients. That will help in plant growth. These are as follows.

• Humic and Fulvic Acids
• Biochemical Materials
• Microbial Inoculants
• Amino Acids
• Seaweed Extracts

The continued usage of this product is believe to enhance fruit colors, taste, and sugar content.

https://www.maximumyield.com/definition/3378/biostimulant