Foliar spray is a vital technique in modern agriculture, used across a wide range of crops including vegetables, fruits, and field crops. It involves applying liquid fertilizers, micronutrients, growth regulators, or pesticides directly to the leaves of plants. This method provides rapid nutrient absorption and plays an essential role in enhancing crop yield, correcting nutrient deficiencies, and protecting against pests and diseases. 1. What Is Foliar Spray? Foliar spray is the process of spraying nutrient solutions or agrochemicals onto the foliage (leaves) of plants. Unlike soil fertilization, where nutrients are absorbed through the roots, foliar application allows nutrients to be absorbed directly through the stomata and epidermis of the leaf surface. This method is particularly effective when root uptake is hindered due to poor soil conditions, drought, or root damage. 2. Importance and Benefits Rapid Nutrient Uptake : Nutrients sprayed on leaves can ...
. Controlled Environment = Higher Medicinal Quality Hydroponics allows precise control over nutrients , pH , light , and humidity , which: Enhances the production of secondary metabolites (like alkaloids, flavonoids, terpenoids) — the bioactive compounds responsible for medicinal effects. Ensures consistency in the chemical profile of plants (important for pharmaceutical use). Example: Hydroponically grown Ashwagandha or Basil (Tulsi) may have higher concentrations of withanolides or eugenol due to stress management and optimal nutrient supply. 2. Faster Growth and Higher Yields Plants grow 30-50% faster in hydroponics due to direct nutrient availability and optimal conditions. Multiple cycles per year are possible, increasing productivity — important for rare or slow-growing medicinal species. 3. Pesticide-Free and Clean Produce Controlled, soil-free systems reduce the risk of pests and ...