Soluble Copper Sulfate for Fertigation, Hydroponic & Organic Use

This copper sulfate fine crystal formula delivers 25% copper (Cu) minimum derived from copper sulfate pentahydrate — packaged in a convenient 2-gallon white plastic pail for easy handling, storage, and dispensing. OMRI listed and certified for use in organic agriculture under USDA NOP rules, it dissolves rapidly for precise dosing in fertigation systems and hydroponic nutrient solutions.

Copper is an essential micronutrient driving enzyme activation, photosynthesis, and lignin synthesis. The fine crystal particle size ensures fast, complete dissolution — critical when working at the low concentrations required in recirculating hydroponic systems.

Guaranteed Analysis

• Copper (Cu): 25.0% minimum — derived from Copper Sulfate Pentahydrate

Hydroponic & Fertigation Application Rates

• Target range: 0.01–0.1 ppm copper in working nutrient solution
• Stock solution: Dissolve 0.15 g in 1 liter of water; apply at 1–10 mL/gallon of working solution to achieve 0.01–0.1 ppm Cu

Key Features

• 25% copper minimum — high-analysis, efficient copper delivery per pound applied
• Fine crystal format — rapid dissolution with minimal agitation; no clogging of injectors or emitters
• OMRI listed — certified for use in certified organic production under USDA NOP
• 2-gallon white plastic pail — resealable, stackable, and easy to store; protects contents from moisture
• Versatile — suitable for fertigation, hydroponic, foliar, and Bordeaux mixture applications

State restrictions: Not available for shipment to Oregon.

⚠️ Ships as a HAZARDOUS MATERIAL: Environmentally hazardous substances, solid, n.o.s. (cupric sulfate) — UN3077, Class 9, PG III. Hazmat shipping surcharges apply.