Why Iron Sprays Work Better at Night ?
Iron (Ferrous) is an important nutrient that keeps crops green and healthy. When plants don’t get enough iron, their young leaves turn yellow and growth becomes slow. Many farmers spray iron to correct this quickly, and the best results are always seen when the spray is done at night.
Here is the simple reason behind it.
Why Daytime Sprays Don’t Work Well
• In daytime heat, the spray dries very fast.
• Sunlight converts ferrous (Fe²⁺) into ferric (Fe³⁺), which plants cannot absorb properly.
• Leaves may face slight stress due to hot temperatures.
Because of these reasons, the plant absorbs very little iron.
Why Night-Time Is the Best for Iron Spray
• Cool temperature allows the spray to stay longer on leaves.
• High humidity at night helps the nutrient enter more easily.
• No sunlight means no oxidation, so the plant gets the full active form of iron.
• Plants stay relaxed at night, which improves nutrient uptake.
This is why greening happens faster when iron is sprayed after sunset.
Which Crops Benefit More?
Banana, grapes, pomegranate, sugarcane, citrus, vegetables, and almost all fruit crops respond very well.
Best Timing for Maximum Effect
• After sunset (6:30–9:00 PM)
• Early morning before sunrise
