Copper 5.4% Micronutrient - 2.5 Gallons

Copper 5.4% - Liquid Copper Micronutrient Fertilizer for Crop Health and Enzyme Function

Copper 5.4% from PowerAg is a liquid micronutrient fertilizer derived from copper sulfate, formulated to deliver an easily absorbed source of copper to crops through foliar application. Each gallon provides 5.4% water-soluble copper (Cu) and 2.0% combined sulfur (S), two complementary nutrients that are frequently deficient together in sandy, highly leached, or organic soils. Copper is an essential micronutrient involved in photosynthesis, enzyme systems, protein synthesis, pollen viability, and disease resistance, and its deficiency can result in significant yield losses and quality reductions, even when macronutrient programs appear well-managed. Copper 5.4% is designed for foliar application across a wide range of field crops, fruits, and vegetables, and is best applied under moderate temperatures and adequate soil moisture and humidity, with early morning or late evening timing preferred for optimal foliar uptake.

Key Benefits

• Water-soluble copper for rapid foliar uptake - the copper sulfate-derived formula provides copper in a water-soluble form that is quickly absorbed through leaf tissue, delivering a fast, nutritional response without the slow solubilization required by some dry copper fertilizers.
• Supports photosynthesis and chlorophyll synthesis - copper is a component of plastocyanin, the protein responsible for electron transfer in the photosynthetic chain; adequate copper maintains efficient light energy conversion and greener canopy color.
• Critical for enzyme systems and protein synthesis - copper activates a range of enzymes involved in carbohydrate metabolism, nitrogen reduction, and the synthesis of lignin and other structural compounds that support plant integrity and standability.
• Improves pollen viability and reproductive performance - copper is essential for normal pollen tube formation and fertilization; deficiency during reproductive stages can reduce grain set, fruit set, and seed development even when vegetative symptoms are absent.
• Supports natural disease resistance - lignin deposition in cell walls is copper-dependent; adequate copper strengthens physical barriers against fungal and bacterial pathogens, contributing to the plant's intrinsic resistance capacity.
• Sulfur included - 2% combined sulfur provides a secondary nutrient that complements copper uptake and supports amino acid and protein metabolism, making Copper 5.4% a two-in-one micronutrient input in a single application.
• Fits any foliar program - compatible with most foliar spray programs; can be applied alongside other foliar fertilizers, fungicides, or insecticides as permitted by the label; liquid formulation mixes readily and leaves no residue in the tank.

Technical Information

• Guaranteed Analysis:
  • Copper (Cu): 5.40% (5.4% water-soluble copper)
  • Sulfur (S): 2.00% (2.0% combined sulfur)
• Derived From: Copper Sulfate
• Formulation: Liquid
• Application Method: Foliar

Crops & Application Rates

Apply foliar at the growth stages listed below for best results. For maximum effectiveness, apply during moderate temperatures with adequate soil moisture and humidity present. Foliar applications are most effective when applied in the early morning or late evening when stomata are open and conditions favor uptake. Always follow label directions for tank mixing, compatibility, and any crop-specific restrictions:

• Corn: 1–2 pt/acre at V4–V8
• Soybeans: 1–2 pt/acre at V3–R1
• Cereal Grains: 1–2 pt/acre at growth stage 2 through stage 8
• Forage Crops & Pastures: 1–2 pt/acre
• Fruiting & Leafy Vegetables: 1–2 pt/acre
• Tree Fruit: 1–2 qt/acre

Avoid application during heat stress, drought stress, or periods of very low humidity, as these conditions can reduce foliar absorption and increase the risk of leaf scorch. Perform a compatibility test before mixing with other products not previously used together.

ALWAYS READ AND FOLLOW LABEL DIRECTIONS BEFORE USE.

Resources

Product Overview (PowerAg)
Copper 5.4% Label (PDF)
Safety Data Sheet (SDS PDF)

Why Professionals Choose Copper 5.4%

Copper deficiency is one of the most agronomically costly micronutrient gaps precisely because it tends to show up late - reproductive failure, poor standability, and reduced disease resistance often occur well before visible leaf symptoms develop. Copper 5.4% gives growers a concentrated, water-soluble liquid source that can be applied precisely at the growth stages where copper demand is highest, whether as a preventive program step or a responsive correction based on tissue test results. The included sulfur adds additional nutritional value without requiring a separate product, and the liquid formulation integrates cleanly into existing foliar programs alongside fungicide and insecticide passes - keeping application trips to a minimum.