Instructions for the use of copper sulfate in gardening and how to dilute it

Instructions for the use of copper sulfate in gardening and how to dilute it

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Copper sulfate is widely used as a fungicide and fertilizer for gardening. This remedy is well known to gardeners and vegetable growers. The use of copper sulfate in horticulture gives the result in the form of good plant development and increased productivity. Consider when and for what to use it, how to dilute the solution, in what dosage for different agricultural practices. What vitriol is compatible with, the rules for its storage, similar preparations.

What is copper sulfate, principle of action

This is a copper salt of sulfuric acid, crystals of a beautiful bright blue-blue color. They are tasteless and odorless. They dissolve well in heated water and are hygroscopic.

Vitriol is used in horticulture as a fungicide and copper fertilizer. The effect of the drug is due to the content of copper ions, in the first case - their destructive effect on fungi, in the second - the need of plants for this element. In both cases, the action of copper enhances the immunity of plants, they become more resistant to diseases.

The element takes part in the formation of enzymes responsible for the metabolism of carbohydrates and nitrogen, which ultimately has a positive effect on the quality of fruits: root crops acquire a sweeter taste, cereals and oilseeds contain more fat, protein, sugars and acids, potatoes become starchy ...

When and why it is used

The branches and trunks of shrubs and trees are treated with vitriol, the vine in the spring, while they are at rest, or in the fall, when the leaves have already flown. It is important that there are no leaves on the plants, and the buds remain unopened, because during spring and autumn treatments, a concentrated solution is used, which leaves burns on the leaves.

The purpose of using copper sulfate is as follows: to disinfect the bark on branches and trunks from fungi, to destroy pests under it and to prevent infection or the release of pests and their reproduction.

During the season, sulfate is used to feed plants with copper. The lack of this element is observed especially strongly on peat and sandy soils, less on fertile ones, for example, on chernozems.

Copper sulfate is also used as an antiseptic, which is used to treat wooden structures to prevent the development of mold on the walls of cellars, greenhouses and other utility structures. The frequency of treatment is once every six months, the solution is applied with a brush or from a spray bottle. For better adhesion and strengthening of the fungicidal action, the substance is mixed with lime.

How to dilute copper sulfate

Depending on the purpose, the concentration of the drug will be different. General rules for preparation: only a non-metallic container is suitable for stirring the solution; you can take a plastic, glass or ceramic container. Do not take cold water, it is best warmed up to 50 ˚С. In cold conditions, dissolution takes longer, crystals quickly settle to the bottom. Dissolving and preparing the solution take longer.

For feeding

Once a season, you need to fertilize the soil with copper-containing fertilizers. Add vitriol at the rate of 1 g per 1 sq. m. Since it is difficult to evenly scatter such an amount of powder, you need to dissolve it in water and water the earth. For spraying, the dosage will be different - dilute 1-2 g per 10 liters.

For treatment

To prepare a solution for processing tree branches and bushes, you need to dissolve 300 g in 10 liters, thereby obtaining a 3% solution. Vegetables in the garden cannot be sprayed with such a concentrated agent; a 1.5% solution is prepared for them. It is necessary to carry out the last spraying 1-2 days before harvesting the fruits, be sure to rinse before use.

For burning out

The proportions for dilution are 500 g per 10 l, that is, a 5% solution. It is used, for the most part, to decontaminate and destroy areas of mold on the walls of buildings and structures. In the garden, a solution of this concentration is used to combat mosses on trees. It is necessary to process extremely carefully, only on sleeping trees.

For whitewashing trunks

It is customary to process the trunks and lower parts of the branches in spring with copper sulfate from fungi. It is simply dissolved in water, with a concentration of 3%, or mixed with lime in the same proportion. Trees are whitened 1 time with the onset of heat. The purpose of the treatment is to destroy pathogens and pests that are under the bark. It is important to whitewash on time, if you are late, the pests will spread throughout the plant and begin to multiply.

From pests

Such treatments can be carried out in spring and autumn, but if pests appeared on the plant during the growing season, use a 1% solution (you need to dilute 100 g of powder in 10 liters of water). The maximum spraying frequency is after 2 weeks.

Instructions for use

The spray liquid should be prepared before use and used quickly, it does not have a long shelf life. Stir until completely dissolved and shake from time to time during use to maintain uniformity. When diluting, it is important to accurately dose the powder, if you exceed the norm, the solution will be toxic to plants, especially if you apply it on green leaves.

Spraying should be carried out in dry weather, on a calm day. The solution works best in warm weather. If rain is expected, it is best to postpone the treatment. If the solution is washed off, it cannot be reapplied immediately. With an excess, copper accumulates in the plant, fruits, and when it gets on the soil, it also accumulates in it. An excess is just as harmful to the life of plants as a deficiency. The action of the substance begins in 2-4 hours and lasts a week and a half.

Expert opinion

Zarechny Maxim Valerievich

Agronomist with 12 years of experience. Our best summer cottage expert.

As a fertilizer, vitriol is used more often for quick feeding with copper. It is applied by watering or spraying. A single application to plants is usually enough to get everything back to normal.

Security measures

Copper sulfate belongs to class 3 drugs in terms of toxicity. It contains agents with moderate toxicity. If you use the drug according to the instructions, poisoning is rare. However, upon contact with skin and mucous membranes, vitriol often causes irritation; to reduce the likelihood of this, you only need to work with it with rubber gloves. Protect eyes with glasses, wear a respirator. Do not drink, smoke or eat during processing.

The solution that has got on the skin must be washed off with warm water. If signs of malaise appear, which may indicate poisoning, conduct self-treatment: drink activated charcoal, drink at least 1 liter of water. Wait 15 minutes. and induce vomiting. If there is no improvement, consult a doctor.

Compatibility with other substances

The drug should not be diluted in general mixtures with drugs from the FOS group and agents that can decompose when interacting with alkaline substances. Despite generally good compatibility, copper sulfate is not recommended to be mixed with any other pesticide. It is advisable to maintain the interval between treatments at least 1-2 weeks.

Storage rules

The shelf life of copper sulfate, as indicated by the manufacturers, is 3 years. But many gardeners have found in practice that, subject to the storage conditions, this substance can be stored without loss of properties for much longer.

Expert opinion

Zarechny Maxim Valerievich

Agronomist with 12 years of experience. Our best summer cottage expert.

The main storage condition is a dry room. The powder, which is in the air, constantly absorbs moisture. The substance cakes and hardens. This does not affect its properties, but the lumps dissolve worse.

It is recommended to use the prepared solution on the same day, but it can also be stored for no more than 3 months. That is, if something remains after processing, you do not need to pour out the solution, you can pour it into a plastic canister and store it under a closed lid.

Storage temperature range - from minus 30 to plus 30 ˚С. The powder is not afraid of freezing, so it is not necessary to keep it in a warm room. Copper sulfate should be placed separately from food, feed and household products. Store in a place where it will be inaccessible to children and animals.


Copper sulfate in agriculture and private households is replaced by preparations containing copper. For example, you can use the tools "Speed", "Chorus", "Hom", "Strobi". They are effective fungicides that are used in the same way as vitriol - to treat fungi and to prevent their appearance. Trees and bushes are treated with fungicides in autumn and spring, but they can also be used on vegetables and berries throughout the season. As a fungicide, copper sulfate can be replaced with iron sulfate, this substance has a similar effect on fungi.

As a fertilizer, the substance is replaced with complex ready-made fertilizers with a high copper content. If you need to add only this element, especially with a pronounced deficiency, it is best to use copper chelate, in which it is presented in the form most assimilable by plants.

Copper sulfate is actively used as an antiseptic and antifungal agent, which always gives the expected result. We can say that for the treatment of bark from fungi and pests, this is an irreplaceable drug. Despite the large selection of synthetic fungicides, gardeners continue to use it, because the substance is easy to use, inexpensive, easy to buy at a gardening store, and has a long shelf life.

Watch the video: Fall Spray for Peach Leaf Curl using Copper Fungicide and check out the graft! (January 2023).