Foliar feeding
/ˈfoʊliɚ ˈfidɪŋ/
Definition
Foliar feeding refers to applying a diluted fertilizer solution directly to plant leaves so nutrients can be absorbed through the leaf surface and stomata, the tiny pores used for gas exchange. It is a horticultural technique, not a natural feeding process by the plant itself. Unlike soil fertilization, which supplies roots, foliar feeding delivers small amounts of nutrients to above-ground tissues and is often used for quick correction of minor nutrient deficiencies.
Practical Relevance
- Fast correction of shortages: foliar feeding can help address some nutrient deficiencies more quickly than soil application because nutrients enter through leaf surfaces and can be used soon after absorption.
- Best for micronutrients: It is most often used for small-amount nutrients such as iron, manganese, or zinc, especially when root uptake is limited by high soil pH or other soil conditions.
- Not a full fertilizer replacement: foliar feeding works best as a supplement, not the main feeding method. Plants still depend on roots for most water and for larger nutrient needs over time.
- Application conditions matter: Results depend on leaf age, solution strength, temperature, humidity, and timing. Sprays applied in cooler parts of the day are less likely to dry too fast or damage leaves.
Related Terms
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