Bordeaux Mixture May 2026

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

Pulverized copper sulfate and hydrated lime are added directly to a filling spray tank while the agitator is running to ensure even mixing. bordeaux mixture

); acidic mixtures are phytotoxic and can burn plant foliage. The mixture is traditionally prepared by dissolving copper

Separate concentrated solutions of copper sulfate and lime are prepared in non-metallic containers. These are then diluted and combined in a spray tank. Separate concentrated solutions of copper sulfate and lime

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

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

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.

Bordeaux Mixture May 2026