Bordeaux Mixture Apr 2026

A common formulation is the 4-4-50 mixture, meaning 4 lbs of copper sulfate and 4 lbs of lime in 50 gallons of water.

) results in a gelatinous, sky-blue suspension of copper hydroxide and calcium sulfate. bordeaux mixture

Pulverized copper sulfate and hydrated lime are added directly to a filling spray tank while the agitator is running to ensure even mixing. A common formulation is the 4-4-50 mixture, meaning

); acidic mixtures are phytotoxic and can burn plant foliage. bordeaux mixture

Two primary methods are used for small-scale and commercial applications:

The mixture is traditionally prepared by dissolving copper sulfate in water and adding a suspension of lime. Mixing copper sulfate ( ) and lime (