1. Application Methods & Dosage
(1)Foliar Spray (Ideal for correcting iron-deficiency chlorosis on fruits, vegetables and flowers)
Mixing concentration: 0.2%~0.3% (2~3 kg ferrous sulfate per 50 kg water).
Application time: Spray on cloudy days or dusk; avoid high-temperature noon.
Frequency: Repeat 2~3 times at an interval of 7~10 days.
Applicable crops: Citrus, blueberry, peach tree, nursery stock and greenhouse vegetables with yellow leaves.
(2)Drench & Drip Irrigation
Dosage: 10~15 kg per mu. Mix thoroughly with organic fertilizer and apply in furrows; prevent direct contact with crop roots for long-term soil acidification and iron supplement.
2. Important Precautions
(1)Never blend with phosphate fertilizer, lime or alkaline pesticides, as insoluble ferric phosphate precipitate will form and reduce fertilizer efficiency.
(2)Prepare solution right before use; aqueous solution oxidizes rapidly and cannot be stored long.
(3)Suitable for saline-alkali land with soil pH＞7.5; limited application on acidic soil.
(4)Avoid overdosage to prevent leaf scorch and iron accumulation poisoning in soil.(5)Seal and keep dry during storage; caked ferrous sulfate after damp can be crushed for normal usage.