The use of calcium nitrate (calcium nitrate) in the garden

Calcium nitrate is a chemical that can be used to fertilize plants. In agriculture, it is commonly referred to as calcium nitrate. There are other names for this substance: calcium nitrate, lime nitrate, calcined or Norwegian. It is also used in construction and other industries. Next, let's talk about properties and applications.

Composition and release form of calcium nitrate

Calcium nitrate belongs to the category of nitrogen mineral fertilizers. The composition is as follows. The amount of valuable substances varies from manufacturer to manufacturer. Approximate indicators: nitrogen - 15% (from 11.6%), calcium - from 16 to 19%.

Urea is richer in nitrogen (46%), like ammonium nitrate (34%), but there are no other useful components in them. While less concentrated, calcium nitrate is milder.

This drug is packaged in Russia by different companies. In retail garden shops and small wholesale bases, the brands "Buiskie Fertilizers" (1 kg, 25 g, 20 g) and Fertika (1 kg) are most often presented. DThe shelf life is usually indicated in the range of 1-2 years, however, the shelf life of such chemicals does not imply any specific restrictions (in a sealed package).

The substance is readily soluble in water (especially in warm water). It is produced in the form of snow-white rounded granules or crystals (like salt, sugar). The granular form is more convenient - it absorbs less moisture from the air. Crystals must be stored strictly in sealed packaging, otherwise they quickly damp, blur, and crumble.

The value of the nitrogen and calcium complex

Nitrogen is an essential element in plant nutrition. But it is poorly absorbed when the soil is acidic. Many nitrogen fertilizers (urea, ammonium nitrate) acidify the substrate. Calcium nitrate manifests itself differently. The combination, the interaction of two components is important in it.

Calcium promotes the penetration of nitrogen into plants. It is especially valuable in acidic and slightly acidic soils.

Most cultivated plants do not like high acidity. Calcium nitrate neutralizes or reduces it. The role of calcium in the life of soil and plants is multifaceted. This item:

  1. promotes the development of beneficial soil microorganisms, which improves the structure of the soil;
  2. neutralizes harmful salts and metals, blocks their entry into plants;
  3. stimulates the germination of tubers, bulbs and seeds in the soil;
  4. activates the growth of root hairs;
  5. strengthens plant cell membranes, helping to resist attacks of diseases and pests;
  6. improves the assimilation of nitrogen and other metabolic processes, chlorophyll synthesis;
  7. helps the movement of carbohydrates, increasing sugar content and other nutritional qualities of fruits, seeds;
  8. increases the keeping quality and transportability of the crop.

Regular feeding with calcium nitrate on acidic soils reduces the incidence of apical rot (tomatoes and peppers), keel (cabbage, radish); give a bright color to fruits (apples, etc.).

Crop restrictions

Do not treat lovers of acidic soil with calcium nitrate:

  • conifers, ferns
  • hydrangea
  • rhododendron, azalea
  • heather
  • blueberries, cranberries, lingonberries

This substance is not needed by crops that prefer a slightly increased acidity of the soil solution:

  • honeysuckle, barberry, viburnum
  • acacia, maple (decorative)
  • lupine, chamomile, poppy

Plants responsive to calcium nitrate

The drug is appropriate to use for those crops that are most productive (decorative) on soils close to neutral. The effect is especially noticeable in plants that carry a lot of nutrients - with abundant green mass or a large load of fruits. Main list:


  • cucumbers, zucchini, pumpkins, watermelons, melons
  • tomatoes, peppers, eggplants
  • potatoes
  • cabbage
  • salad and other greens
  • peas, beans
  • onion garlic

Fruit and berry

  • strawberries, strawberries
  • stone fruit crops (cherry, plum, etc.)
  • grapes
  • Apple tree


  • clematis
  • lilies (tubular, LO and OT hybrids)
  • phloxes
  • dahlias
  • gladioli, spring bulbous
  • petunia
  • lawn


Soil type

  1. It is not recommended to use calcium nitrate on alkaline soils.
  2. The most effective application on slightly acidic and acidic soils.
  3. Orchards and vegetable gardens located on sod-podzolic soils respond well to calcium nitrate. This is a territory of mixed forests and forest-steppes in the East European and West Siberian plains.
  4. On heavy clays and loams they feed less often, on light sandy loams - little by little, but more often.

Terms, methods and dosage

It is convenient to measure calcium nitrate, since it is equal in weight and volume to water, that is, 1 liter of this fertilizer weighs 1 kg. In a standard glass - 200 g, in a tablespoon or matchbox - about 20 g.

  1. When plowing the plantation in spring, when digging the beds, dry granules are introduced - from 1 to 2.5 kg per 10 square meters. This method is rarely used - if there is no organic matter.
  2. Dry fertilizer is poured into the holes in the spring before planting. Especially useful for cabbage, tomatoes, peppers on sour soils (1 teaspoon per well).
  3. Fertilizing seasonal watering: 20 g of the drug is dissolved in 10 liters of water, spent on 10 square meters of planting. Under a bush, a young tree, 2-3 liters of solution are poured at a time, under an adult tree - about a bucket.
  • Cherries, plums, apple trees, grapes, ornamental shrubs, perennial flowers - once in the spring before bud break or at the beginning of the growing season.
  • Lilies - 1 time: when the shoots grow to a height of 10 cm.
  • Strawberries, strawberries - after the snow melts and at the beginning of August.
  • Seedlings (tomatoes, peppers, cucumbers, cabbage, celery, flowers) - once every 2 weeks.
  • Cucumbers, zucchini - multiple times, every 7-14 days (according to needs).
  • Onions, garlic, lettuce, celery, potatoes, tomatoes, beans, peas, petunia, siderata - 1-2 times in the growing stage of greens.
  • Lawn - 3 times, every 30 days (from mid-April to mid-summer). Dosage 400 g per 10 square meters.
  1. Foliar dressing
  • allow you to quickly deliver food to plant tissues
  • especially useful in cool or hot weather (when the inflow through the roots is reduced)
  • needed on acidic soils for the prevention of diseases (rot of tomatoes and peppers, bitter pitting of apples)
  • increase the nutritional value of fruits, prolong the shelf life, improve color (apples, tomatoes, etc.)
  • give splendor to ornamental deciduous plants, improve the presentation of seedlings

Solution: 20-30 g of fertilizer per 10 liters of water. Spraying of tomatoes, peppers, cucumbers, cherries, plums, grapes, apple trees is carried out two to four times per season (for early greenery, in the budding stage, at the beginning of fruit formation). Spend 1.5-2 liters per 10 square meters of planting or on a large bush, half a bucket per tree.

This soluble fertilizer can be conveniently applied through drip irrigation and overhead irrigation.

Additional rules

When working with calcium nitrate, the same principles apply as with other nitrogen fertilizers:

  1. Liquid root dressing for perennial crops is given only in the first half of summer, otherwise their winter hardiness decreases.
  2. It makes no sense to fill the earth with saltpeter during the autumn digging: before the next season, nitrogen will be washed out.
  3. Do not feed "fattening" plants with signs of excess nitrogen.
  4. Do not exceed the dose.

Consequences of an overdose:

  • "Fattening" of green mass to the detriment of fruiting
  • plant and soil burns
  • excess nitrates in foods

Alternative application

Fresh sawdust is moistened with a solution of calcium nitrate (60 g per 10 l of water) so that they quickly re-heat. A similar mixture (only the fertilizer concentration is made half as much) is taken as a substrate for forcing tulips.


Experienced gardeners advise not to mix calcium nitrate with any other preparations at all - neither dry nor dissolved.

It is strongly NOT recommended to pair with:

  • other nitrogen fertilizers (both mineral and organic)
  • humates
  • superphosphate
  • potassium chloride
  • lime substances
  • stimulants, pesticides

Dry mixing of granules with phosphate rock, potassium sulfate, ash is allowed - just before application to the soil.


Store calcium nitrate in sealed original packaging. An open pack should be kept in a dry place, used within six months.

The substance belongs to the III hazard class. This means that in normal use it is not hazardous to humans and the environment. Strong concentrations can cause burns to the skin and mucous membranes. All operations with fertilizer must be done carefully, wearing work clothes and rubber gloves. If the chemical comes into contact with the skin and eyes, rinse with running water, if you inhale crystalline dust, wash the mucous membranes, if accidentally swallowed, drink a large volume of water, take activated charcoal and consult a doctor.

Information on the explosiveness of calcium nitrate is very contradictory. Fertilizer manufacturer Buysky Chemical Plant calls the substance "explosion-proof and non-combustible", says Gostekhnadzor. However, the research group "InfoMine" warns that the chemical can ignite with an explosion if it is violently shaken or struck (like ammonium nitrate).

Freight carriers note: calcium nitrate practically does not ignite when ignited, but when heated and severely hit, it can decompose with an explosion and flame, releasing toxins. It is recommended to keep the fertilizer away from any other substances, away from burning organic matter, away from fire. The fire is extinguished with very large amounts of water. The caked fertilizer mass is not split by blows, but dissolved.

Calcium nitrate is a valuable nitrogen fertilizer for gardeners and gardeners, farms and peasant households. Its use is especially beneficial on soils with high acidity. An improvement in nutrition and stimulation of immunity are observed in those cultivated plants that prefer a less acidic reaction of the soil solution.

Fertilizing tomatoes with calcium nitrate allows you to meet the crop's need for nitrogen and calcium. If other fertilizers can serve as a source of nitrates responsible for the formation of vegetative organs and the growth of green mass, then the situation with Ca is different.

Almost all top dressing, except for calcium nitrate, contains the element in a form that is difficult to reach for plants. When applied in autumn, it begins to "work" only in the spring, and the peak of assimilation falls on the 2-3rd season.

But tomatoes without Ca will develop poorly, get sick with apical rot, will not be able to grow a root, assimilate other nutrients, absorb water, and will die with a critical lack of an element. If the necessary fertilizers were not applied in one of the previous seasons, calcium nitrate for tomatoes will be a salvation. A drug:

  1. In the vegetative phase, it allows tomatoes to grow both green mass and root system at the same time.
  2. After the appearance of the ovaries, the need for nitrogen is satisfied. Due to the low content of the element (13-15%), when used correctly, it does not lead to fattening.
  3. Strengthens the root, allows it to develop normally.
  4. Calcium increases the resistance of tomatoes to negative factors: temperature changes, waterlogging, drought.
  5. Prevents the crop from getting sick with top rot, and if a problem appears, quickly eliminates it.
  6. The use of calcium nitrate increases sugar content, improves taste, increases productivity, shelf life of tomatoes.
  7. Slightly deoxidizes the soil.

Fertilizing pros and cons

The drug has its own advantages and disadvantages.

Calcium nitrate has more advantages than disadvantages:

  • it is a good source of nitrogen
  • it facilitates the absorption of calcium because contains nitrogen in the form of nitrates
  • calcium - a constituent element of the substance, is consumed by plants in large quantities
  • supports the porous structure of the soil
  • increases productivity and product quality
  • enhances plant resistance to diseases and pests
  • improves the transportability of products
  • prolongs the shelf life of fruits
  • contains no additives or fillers
  • does not evaporate, does not wash off and does not cause burns
  • does not increase the alkaline composition of the soil
  • does not increase salt in the soil.

Among the shortcomings are noted:

  • it is not organic matter
  • outdoor use is less effective than indoor plants.

The effect of the substance on plants

Calcium nitrate is a unique fertilizer because it contains calcium in a water-soluble form. It allows you to easily and quickly assimilate the second mineral of fat - nitrogen. It is this combination of calcium and nitrogen that allows tomatoes to grow lush and healthy.

It should be noted that nitrogen is responsible for the growth and development of plants, but calcium itself plays an equally important role in the process of plant vegetation. It helps the roots absorb nutrients and moisture from the soil. In the absence of calcium, the roots of tomatoes simply cease to perform their function and rot. In the process of reducing the concentration of calcium in the soil, the transport of substances from the root to the leaves is disturbed, as a result of which one can observe the wilting of old and drying of young leaves. With a lack of calcium, dry edges and brown spots appear on the leaf plates of tomato.

A sufficient amount of calcium nitrate in the soil has a number of positive effects:

  • accelerates seed germination
  • makes plants more resistant to diseases and pests
  • makes tomatoes resistant to low temperatures
  • improves the taste of vegetables and increases productivity.

Thus, it is possible to restore the lack of calcium in the soil and activate the growth of tomatoes, make the harvest tasty and abundant with the help of calcium nitrate.

Calcium nitrate for feeding flowers and crops

Calcium nitrate has several other names like calcium nitrate, calcium nitrate, and calcined nitrate. This mineral fertilizer is used by gardeners, gardeners to provide additional fertilizing to crops and flowers. In this article you will learn about the features, properties of this fertilizer, instructions for use in agricultural work.

What it is?

Calcium nitrate, as a fertilizer in the form of granules or white crystals, can be readily soluble in water and consists of the following components:

  • about 19% calcium
  • 13% to 16% nitrogen present in nitrate form.

Calcined nitrate is predominantly applied to acidic soils due to its ability to neutralize acids. Excess iron and excess manganese are taken from the soil by calcium, which allows accelerating the process of fruit ripening, revitalizes growth and serves as a guarantee of normal vegetation.

Also, calcium nitrate helps to strengthen the immunity of plants, helps to protect seedlings from pests and diseases arising from a lack of calcium.

It is the best fertilizer that suits any soil, can be used in regions with any climatic conditions, but it has the most beneficial effect on plants where there is little rainfall, that is, in arid regions.

Properties, benefits

The use of calcium nitrate in agriculture brings a good harvest, in most crops the yield increases by almost 15%, and also does not have a negative toxic effect on the human body.

Calcined nitrate has the following properties:

  1. High level of hygroscopicity, which means good water solubility.
  2. Does not oxidize the soil compared to urea and other nitrogen fertilizers.
  3. Can be stored for a long time in a sealed sealed package.

That is why the use of calcium nitrate is possible in any type of soil, but this fertilizer will be most useful for sod-podzolic soil.

What are the benefits of calcium nitrate in the garden:

  1. When using this mineral fertilizer, the process of photosynthesis in plants is accelerated.
  2. Calcium nitrate promotes the growth of the plant as a whole and its green part. Also, calcium nitrate provokes the active development of the root system when working with it.
  3. Fast germination of seeds is ensured.
  4. After processing crops and garden plants, they will be resistant to temperature extremes and more resistant to pests and diseases.
  5. The presentation of the harvested crop is much improved and the shelf life of the fruits increases.

The disadvantage of calcined nitrate is that when using it, in no case should you deviate from the prescribed terms for fertilizing the soil and the doses described in the instructions.

If the doses do not correspond to those described in the instructions, calcium nitrate can destroy the root system of the plant. This is due to the fact that the root system ceases to receive a sufficient amount of nutrients that it needs for life. Because of this, the roots cease to absorb moisture and the root system of the plant begins to rot.

When to deposit?

Calcined nitrate, according to the instructions, should be brought in in the spring, when spring work is being carried out to dig up the soil.

In the autumn, the use of a fertilizer containing calcium nitrate is undesirable and even prohibited, because adding calcium nitrate to the soil will not bring any benefit.

The fact is that the nitrogen contained in the fertilizer is washed out along with the melted snow, as a result of which only calcium will remain. Calcium alone is more likely to be harmful than beneficial.

Instructions for use

Fertilizer calcium nitrate is used as a top dressing, which can be both root and foliar. Before planting vegetable crops, the use of calcined nitrate is mandatory, because it has a high nitrogen content.

Calcium nitrate can be used for the following crops:

For cucumbers

The first foliar feeding or processing will begin when the third leaves appear on the stems. Then the cucumbers are fed every 8-10 days until the fruits are formed.

Calcium nitrate helps to protect the root from possible rotting. The solution with which the cucumbers will be processed should consist of a liter of water and 2 grams of calcined nitrate. Root dressing should be the same as for tomatoes.

For tomatoes

Calcium nitrate treatment is also very important, because it will protect young tomato bushes from slugs, black rot and ticks. Tomatoes will be protected almost until the fruits appear and ripen, that is, the treatment will give a prolonged effect and strong immunity is maintained.

For root dressing, a solution is used, diluted with 20 grams of calcium nitrate in a 10 liter bucket, before flowering. Foliar feeding of tomatoes should be carried out a week after you have planted the seedlings in open ground.

For strawberries

Root dressing is done before the beginning of the flowering period from a solution diluted with 25 grams of calcined nitrate in 10 liters of water

Shrubs and other fruit trees are root-fed before buds begin to bloom. In a 10 liter bucket of water, from 25 grams to 30 grams of calcium nitrate is diluted

You should be quite careful, because if cabbage seedlings are very fond of feeding from calcined nitrate, then adult cabbage does not like acidic soil, but calcium nitrate brings undeniable benefits, therefore 1 teaspoon of mineral fertilizer in the form of granules should be applied directly to the planting hole, and not while digging the soil.

Having poured the fertilizer, it is imperative to sprinkle it a little with earth, otherwise the fertilizer will burn the root system of the plant. After you have poured a small amount of soil onto the fertilizer, you can lower the root and plant seedlings.

Thanks to calcium nitrate, cabbage will be least susceptible to various diseases and attacks of pests, cabbage will begin to grow actively, leaves will appear quickly and the head will begin to twist.

Solutions of the following components are used: liters of water and 25 grams of granular calcined nitrate.

For 1 square meter of land, it is approximately necessary (for the exact dosage of use, see the instructions):

  • liter, one and a half liters of calcium nitrate solution for vegetables and berries
  • liter, one and a half liters of solution for flower cultures
  • one and a half, 2 liters for shrubs and fruit trees.

Calcium nitrate for flower crops

Calcium nitrate is well suited not only for crops, but also for flowers. Indeed, during the season, when flower crops grow and contact with the soil begins, then wetting begins to form after watering or heavy rainfall.

In places of contact, rotting begins, which leads to the defeat of flower crops by pests.

Pests spoil the appearance of lilies, therefore, the processing instructions advise using a solution of a liter of water and 1 teaspoon of calcined granular nitrate. Calcium nitrate will help to increase the resistance of lilies to external influences, which are unfavorable, will thicken the leaves and trunks and will begin to contribute to the good development of the green mass.

The favorite flowers of gardeners are also perennial phlox, which look quite impressive in the garden and do not require special care. The minimum care for this flower crop includes fertilization with calcined nitrate, otherwise the stems will begin to become thin, the flowers will become small and the proper effect of the flowers will be lost.

In view of this, perennial phloxes should be fertilized with calcium nitrate at the beginning of the season as the first feeding. In a liter of water, 2 grams of calcium nitrate are diluted, then the plant is fed with root feeding and after 10 days this procedure is repeated. After you have fed perennial phlox twice with root feeding, you can switch to foliar feeding

Another popular plant that gardeners like to plant are petunias.

Petunias have fragile seedlings, so a solution of calcined nitrate is used to strengthen the skeleton and increase the volume of flowers. Root feeding is also necessary for petunia sprouts that have only recently been planted in open soil. A solution of a teaspoon of calcium nitrate dissolved in a liter of water helps to protect petunias from gusts of wind during initial growth.

Calcium nitrate feeding rules

The most common vegetables that are necessarily grown on the plots are tomatoes, cucumbers and cabbage. For them, feeding with calcium nitrate is required.


Stages Top dressing Timing
Seedling Watering under the root with a solution: for 10 liters of water, 20 g of calcium nitrate and 100 g of ash or 20 g of the product in each well A week after planting in open ground, with 3 true leaves
Growing bush during the growing season Spraying the bushes with a solution: for 10 liters of water, 100 g of nitrate Every 2 weeks until the ovaries form
Stage of the beginning of fruiting Stop due to the possibility of accumulation of nitrates in fruits Fruit formation


Stages Top dressing Timing
Seedling Spraying with a solution: for 1 liter of water 2 g of nitrate or add 1 tsp into the hole, mixing with the ground When 3 true leaves appear, repeat every 10 days
Growing lashes during the growing season Root watering with a solution: for 10 liters of water 25 g of the product Every 2 weeks
Stage of the beginning of fruiting Stop due to the possibility of accumulation of nitrates in fruits The beginning of fruit formation



Stages Top dressing Timing
Seedling Adding 1 tsp to the well. saltpeter, sprinkle with earth on top to prevent root burns. Root watering with a solution: for 1 liter of water 1-2 g of the product In the presence of 2-3 true leaves
Adult plant Not recommended The entire ripening period

For such garden crops as onions, beans, potatoes, garlic, celery, it is recommended to use calcium nitrate no more than 2 times in the phase of green formation. Watering is carried out at the root with a solution: for 10 liters of water, 20 g of nitrate.

For fruit trees, the solution is also prepared. Trees are watered before budding at the rate of 5-8 liters per tree, depending on its size.


Feeding flowers with calcium nitrate is recommended for varieties with brittle stems, heavy inflorescences, due to which the stems bend and come into contact with the ground, as a result of which the plant may rot.

Flower type Top dressing
Phlox (against the degeneration of the variety and the crushing of flowers) Watering with the solution in the spring when the first leaves appear and spraying after 10 days. Solution: 2 g per 1 liter of water.
Lilies (against stem breakage and rot) 1 time when the stem grows by 10-12 cm. Solution: 1 tsp. for 1 liter of water.
Petunias (to prevent wind breakage) Watering seedlings and when planting in open ground. Solution: 1 tsp. for 1 liter of water.
Roses (for gradual opening of buds and brightness of colors) Watering in the spring after pruning. Solution: 1 tbsp. l. 10 liters of water.

Reviews on the use of calcium nitrate

Olga Timofeevna Zlotnikova, 49 years old, Tomsk region:

I use calcium nitrate in all cultures. Tomatoes and other nightshades are especially in need of them - our soil is sour, not too fertile. Vertex rot without calcium cannot be avoided. Nitrogen is needed for the development of leaves and stems.

Larisa Igorevna Odintsova, 51 years old, Stavropol region:

My husband and I are farmers. Calcium nitrate for us is nitrogen fertilizer and salvation from top rot. We grow a lot of tomatoes - in greenhouses, open ground, it is difficult to feed from a watering can. We add the drug with drip irrigation, it does not spoil the tubes, it works effectively.

Top dressing of tomatoes with potassium monophosphate: application features

Health for tomatoes: instructions for use

Borofoska: instructions for use for tomatoes

Fertilizing tomatoes with ammonia

Fitosporin-M: instructions for use for tomatoes

Fertilizer Agricola for tomatoes: how to apply

Watch the video: Calcium nitrate for sili na kulot ang dahon

Previous Article

Croton: growing, reproduction and transplantation, species and photos

Next Article

Uzbekistan - Story of my trip to Uzbekistan