Dry Nutrients and Stock Tanks: Mixing Order for Commercial Fertigation

Dry nutrients can reduce freight and storage associated with pre-diluted liquid products, but the advantage depends on accurate weighing and disciplined mixing. Concentrated salts should be treated as a chemistry system.

Use a written mixing order

Products that are compatible in the final irrigation solution may not be compatible when combined as concentrates. Follow the current product label and dissolve each component into water in the specified sequence.

Confirm complete dissolution

Add the next component only after the previous material is adequately dissolved. Water temperature, agitation and concentration can affect dissolution speed.

Separate stock tanks where required

Calcium-containing concentrates can react with concentrated phosphate or sulfate sources and form precipitates. Keep incompatible stocks separate and combine them only after sufficient dilution according to the program instructions.

Verify the injector ratio

The stock concentration and injector setting work together. Record both so another operator can reproduce the same final feed without relying on memory.

Measure the result

Check final EC and pH after mixing and compare them with the facility target. Periodically verify injector output and clean strainers, tanks and lines.

See PURE FUEL® nutrients and the feed guidance in the Pure Technical Library.