Liquid Boron 5% Fertilizer: Foliar Spray Guide for Cotton and Fruit Crops
Boron is needed in very small quantities compared to macronutrients, but it plays a disproportionate role in pollen germination, flower retention, and fruit or boll set — deficiency often shows up not as visible leaf damage but as poor fruit set and lower yield with no obvious explanation.
Our Bukhara (5% liquid boron) is formulated for foliar application, delivering boron directly to the plant during flowering, the growth stage when boron demand is highest and soil-applied boron often can't keep pace with plant uptake.
Cotton, sunflower, and a range of fruit crops respond well to a foliar boron spray timed just before or during early flowering, when improving pollen viability and flower retention has the biggest impact on final yield.
Boron has a narrow safety margin compared to most micronutrients — overapplication can cause its own toxicity symptoms — so it's worth following label dosage carefully and avoiding boron sprays on crops that haven't shown a deficiency history or soil test indication.