How to use boric acid to process tomatoes

In order to grow a good crop of vegetables, every gardener should know that this requires high-quality seedlings, weeding beds, timely watering and the destruction of pests. One of the main components of plant care is planting fertilizer. For fertilizer, both organic solutions and chemical preparations are used. Organic fertilizers include mullein, bird droppings and extracts from rotted weeds. But we will consider a substance such as boric acid for tomatoes and find out what it is and how to use it.

Boric acid for processing tomatoes

Description of the drug

This is a chemical that can be found in nature. It is found in mineral springs, hot geysers and the sassolin mineral. Isolated chemically, with a mixture of sodium tetrabonate (borax) and hydrochloric acid, it is odorless. Powder of white or transparent color, upon closer examination, consists of layered flakes. Orthoboric acid is relatively poorly soluble, relative to others, but its suspension can be obtained in hot water.

When working with this drug, care must be taken and personal hygiene. If ingested orally, in the human body, it can lead to death. Fatal for an adult, is considered a dose of about 15 grams, and for children 4 grams is enough to kill a child. So, when applying it to fertilize plants, you need to be extremely careful.

How to determine the lack of boron in the soil

The most true, to determine the presence of various substances in the soil, is naturally its chemical analysis. But in the private economy this can be determined by the state of the plants.

  1. If it is noticed that with a green top, the leaves of tomatoes have yellowness.
  2. It often happens that the leaves become stained and curled.
  3. The stem itself can break, because it becomes fragile.
  4. Flowers of vegetable crops are few in number and do not give an ovary.
  5. Assorted fruits may, in part or in full, crumble.
  6. The bush becomes ugly curved and there are very few leaves on it.

These signs are sufficient to understand that there is not enough boron in the soil, as can be seen in the video. If everything is left to chance, then the point of growth will die, and eventually the whole plant.

Chemical benefits

Tomato seeds are often treated with a mixture of boric acid with potassium permanganate, so that the tiny plant becomes stronger. This is especially necessary when seeds are planted in containers on the windowsill. The lack of light is slightly offset by the fact that the mass of plants will absorb more organic matter from the soil. If you spray our tomatoes with boric acid, then the risk of infection of dense plantings with late blight is reduced.

When you take it to process tomato seedlings, before planting, the seedlings will be strong and will quickly take root. But for this they make up a solution of weak concentration. Fertilizing tomatoes with a warm solution of boric acid is twice effective. It not only fertilizes, but also fights late blight and other plant diseases.

The benefits of using boron

Feeding flowering tomatoes with a solution of boric acid is very useful. It is necessary to process plants in order to prevent.

It significantly increases the number of flowers in the brushes of the plant. And, practically, all flowers will give an ovary that does not crumble.

  1. Boron increases the resistance of plantings to fungal diseases, and reduces to zero the occurrence of putrefactive processes on leaves and fruits.
  2. The sugar content of fruits increases and their taste improves.
  3. With regular and proper feeding, the ripening time of the crop is reduced.

It follows that if we take boric acid for processing tomatoes and cucumbers, spraying with the drug will not only increase the yield, but also collect it earlier than on the beds without using boron.

After transplanting seedlings, we used to most often water plants with potassium permanganate, to disinfect the soil and stimulate growth. But using a solution of boric acid to process our tomatoes and adding mullein, we will see that the organics will be more successfully and more fully absorbed by the plant. Weaker seedlings, compared to those that grow in the field, are grown hydroponically or in balcony boxes. Boron will give them a chance to grow strong, give abundant flowering and successfully bear fruit.

When to use boric acid

To improve germination, seeds can be processed

We know that the use of boric acid solution for the treatment of tomato seeds increases their germination. But if you do not, then all the same tomato seedlings will be viable. But you need to know when you can spray tomatoes with boric acid. That it was enough for plants and they did not get a burn, it is necessary to correctly determine the timing of fertilizer plants.

We need to start when we see that the condition of the seedlings has worsened, and there are signs of a lack of boron. The first feeding of young cucumbers and tomatoes with boric acid is carried out before the first flowering wave. If it is carried out correctly, then each flower brush will retain all the ovaries. They will be shaped to match the variety, and the skin of each fruit will be smooth and shiny.

After the first wave of flowering, fruit set begins and a mass of flower brushes is formed, up to 12, on one plant. Then it’s time to treat the tomatoes with boric acid a second time. Spraying the tomato with boric acid for the ovary will help preserve all the fruits and the plant will not weaken. Boron helps the movement of juice, inside the stem, which carries a huge amount of sugar, and other beneficial substances, to the fruits.

The third time the tomato is treated with boric acid is when the fruits have poured and begin to stain. This will help the plant to fully maintain the crop and prevent the development of diseases. It is very disappointing when the tomatoes are already reddening, but at the same time, spots of rot on the fruits appear. But in order for the foliar and root dressing of tomatoes to bring results, you need not to overdo it.

Solution preparation

In order not to raise questions about whether it is possible to spray tomatoes with boric acid, it is necessary to correctly follow the recommendations for the preparation of solutions. First you need to heat the water because the crystals do not completely dissolve in cold water. Instructions are always available on the packaging of the drug, where the table contains a prescription for the preparation of solutions. A solution is prepared, and then, after cooling, the liquid is added in the proportions necessary for a certain treatment.

To preserve all the ovaries, 1gr boric acid for spraying tomatoes is dissolved in a liter of very hot water. To protect the plant from phytophthora, add a teaspoon of the powder to hot water. Before this, in a week, to improve the action of boron, one can spray the plantings with weak potassium permanganate. After boron, again after seven days, a weak solution with iodine is used in the garden. If a finished preparation is purchased, then it can only be diluted to the desired concentration and used.

How to process tomatoes

How to spray tomatoes with boric acid so as not to harm the fruits? Topping tomatoes with a solution of boric acid should take place according to the rules.

  1. The first processing of tomatoes with boric acid is carried out when bushes are just formed, before flowering.
  2. If the pollination of flowers takes place, then it is forbidden to spray tomatoes with boric acid, it is better to fluff the trunk area with ash.
  3. With a weak solution, the bushes are fed during watering, which also brings a positive result, if you can not use foliar methods of fertilizer.
  4. It is impossible to exceed the concentration of boron because its excess in the soil can destroy the stands.
  5. Before spraying tomatoes with boric acid for the second time, at least 10 days have to pass.
  6. If the condition of the plants worsens after treatment, then it is necessary to postpone or stop the procedure completely.

Listening to the tips and watching the development of vegetable bushes, you can find out whether to spray tomatoes with boric acid right now or wait a bit. When and how to sprinkle tomatoes with boric acid, for growth or for a better ovary of tomatoes can be found on the sites by reading the table of contents.

Spray only on a calm day.

When it is better to spray tomatoes with boric acid, it also depends on the weather. On a rainy and windy day, you need to refrain from such a procedure. The solution will be blown away from the leaves and the concentration on different bushes will be different. And if the rain will wash off the boron, then yes, fertilizer will occur, but only in the form of watering. And the concentration of boron will be much less necessary for our vegetables.

For the setting of tomatoes, boron treatment will help if it is carried out before flowering.

Spraying with iodine, plus potassium permanganate, is a necessary procedure before applying boron. If planned treatments do not bring benefits, then the norm for subsequent ones depends on the condition of the plants. You can use foliar top dressing such as spraying your tomatoes with boric acid, if you see that the leaves curl and fall off.

Work Precautions

The main thing when working with chemicals is that safety rules must be observed. Before you dilute the solution and apply it in horticulture or for the garden, you need to protect yourself. To protect a person, it is necessary to prepare:

  • respirator;
  • rubber gloves
  • apron.

They are especially useful in a greenhouse where cucumbers and tomatoes are grown. There, the solution fumes have a high concentration and can breathe on the mucous membranes when breathing, causing irritation and burns. Why risk health in vain?

Suspension is prepared outdoors in warm weather. The finished solution is poured into nebulizers, the face is protected using glasses, and a respirator. If the treatment is carried out at home, then you need to protect the animals from getting the drug on them. For both humans and animals, one-time exposure to the respiratory tract will be unpleasant, but when reapplied, it becomes life threatening. Boron is poorly excreted from the body and has the ability to accumulate in it.


Tomatoes and soluble boric acid, together with iodine, for their fertilizer, can provide a large and tasty crop of fruits. Different proportions are needed, both for root dressing, and in order to spray the plants. We told how much and what is needed to successfully grow a crop and protect it from late blight. They answered the question about how to process our tomatoes with a boron mixture, and how tomatoes and concentrated boric acid interact. Therefore, using this drug, we will be sure that we will get to the table an abundance of delicious products.


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