Physical Characteristics

Copper sulphate, blue stone, blue vitriol are all common names for pentahydrated cupric sulphate, CuS04.5H20.

Crystalline Copper Sulphate contains about 25% Copper and is an effective rotational way to fertilise for copper deficiency.

Product Analysis

Copper 25%
Sulphur: 13%S = 32% SO3

It is an alternative to expensive foliar applications, which have to be repeated throughout the season.

Crystalline Copper Sulphate is a hazardous Material. See our MSDS Sheet

Fertilising for Copper

Where copper deficiency has been confirmed by soil analysis or field diagnosis, whether in plants or animals, it can be corrected very simply by applying 50 kg copper sulphate per hectare in the form of a fertiliser before sowing. This supplies 12.5Kgs/ha elemental Copper.

Bunns Standard Full Copper Application is 30kgs/ha Copper Sulphate which supplied 7.5 Kgs/ha Elemental Copper.

Bunns Standard Half Copper Application is 15kgs/ha Copper Sulphate which supplied 3.75 Kgs/ha Elemental Copper.

Alternatively by spraying the foliage of the young cereal plants, when they are about 150 mm high, with 750 grams copper sulphate (dissolved in from 400 to 2,000 litres water) per hectare.

The soil application has generally given the better results and has the advantage that it may have a residual effect for more than ten years. The foliar application has to be given annually to each crop. An alternative is to add a copper containing slag (normally about 1% to 2 % copper) at a rate of a tonne to the hectare.

At Bunns, we often blend-in Copper Sulphate to root fertilisers on light land to fertilise for copper deficiency. It is an alternative to expensive foliar applications, which have to be repeated throughout the season.