The use of calcium nitrate as a fertilizer

Plants in the garden, vegetable garden, and flower garden need various fertilizers, among which calcium nitrate is not the least important. In retail chains it can most often be bought under the name “Fertika”, less often - “Calcium nitrate”.

We will tell you what is remarkable about this fertilizer, what its composition is, method of application and storage rules. We will also talk about the features of application on different crops.

Calcium nitrate - what is it?

Calcium nitrate, also known as calcium nitrate or calcium nitrate, is an alkaline mineral fertilizer of chemical origin. Calcium in this form is best absorbed by plants, especially if they are grown in acidic soils. The properties of calcium nitrate are fully revealed on wood-podzolic soil.

Calcium nitrate is produced in the form of powder or granules, highly soluble in water. Chemical formula of the fertilizer: Ca (NO3)2. The detailed composition can be found in the table.

SubstanceQuantity (%)
Calcium19
Nitrogen13–16
Bor0,3

Calcium nitrate can be used on all soils and to fertilize most crops. Farmers often buy calcium nitrate in the form of granules: they dissolve faster in water and do not generate dust.

The packaging of calcium nitrate depends on it, usually packaged in small bags weighing 1 kg. If the drug is from, then the packaging can be 20 g, 25 g, and 1 kg. Some manufacturers package fertilizer in 30 and 50 kg bags.

The nitrogen contained in the fertilizer can accumulate in plants in the form of nitrates. Therefore, the dosage must be strictly observed.

Safety precautions

A novice gardener must work carefully with mineral fertilizers, because they are chemicals. Among the most common mistakes made by beginners is working without a respirator or gloves. Fertilizers can cause poisoning. They enter the body through the nose, eyes, and wounds on the skin. Poisoning, in turn, provokes problems with nerves and kidneys. It is important to follow safety precautions.


Fertilizing should only be done with gloves.

Feeding should only be done in clothes that are specially prepared for this procedure. When working, you should use a respirator and thick rubber gloves. After completing all procedures, the gardener needs to wash himself.

Mineral fertilizers are undoubtedly very useful for a summer cottage. It's easy to buy them. They are sold in all garden stores. However, before use, you must read the instructions and follow all recommendations. Strawberries will be healthy only if you feed them properly.

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Features of fertilization

Calcium nitrate from any manufacturer can be applied to the soil in the spring, and also used as a systematic fertilizer in the summer. At this time of year, fertilizer solutions are used for root and foliar feeding.

Calcium nitrate should not be applied in the fall, during plowing or digging. In this case, the fertilizer will decompose over the winter, releasing nitrogen. Calcium without it will not be absorbed by plants, so there will be no benefit from this approach.

The easiest way to measure fertilizer is with spoons. A tablespoon contains approximately 20 g of calcium nitrate, a teaspoon contains 6–8 g. To prepare solutions of more precise concentrations, it is better to buy electronic scales.

The effect of calcium nitrate

Typically, the most widely used fertilizers in home gardening and vegetable growing are those containing potassium, phosphorus and nitrogen. This is explained by the low need for calcium in plants and its high content in the soil.

However, in depleted areas with an acidic reaction, calcium nitrate, subject to dosage, will show its properties in all its glory. Here gardeners and gardeners note:

  • acceleration of ripening of tomatoes and other fruit plants;
  • accelerating the development of seedlings planted in open ground;
  • increasing the period of fruiting;
  • improving the integrity of the fruit shell;
  • positive changes in the taste of fruits and berries.

Calcium nitrate stimulates the development of the root system. Therefore, plants are better able to withstand periods of drought and require less water for normal growth and fruiting. At the same time, resistance to prolonged rains and sudden cold snaps increases. Resistance to fungal and bacterial diseases is increasing.

In regions with frequent, prolonged rains, calcium nitrate is recommended to be used as a nitrogen fertilizer.

Why feed strawberries?

Without transplanting, strawberries can grow on one piece of land for at least three to four years. Over such a long period of time, the soil under the bushes is depleted, useful elements such as phosphorus, potassium, nitrogen, magnesium and boron are washed out. Therefore, it is necessary to add fertilizers when caring for this berry crop.

Remontant varieties of strawberries, capable of bearing fruit many times during one season, need feeding once every ten days.

These are varieties such as “Queen Elizabeth”, “San Andreas”, “Diamant”.

What does feeding strawberries provide:

  • increases the yield, accelerates the ripening time of berries;
  • improves the taste of the berry, saturates it with vitamins, fructose, pectin;
  • increases the resistance of seedlings to fungal diseases and adverse weather conditions;
  • provides the plant with necessary macro- and microelements;
  • promotes the formation of flower and stem buds;
  • accelerates the appearance of green mass in early spring;
  • stimulates the formation of buds and ovary.

Interaction with other fertilizers and drugs

Calcium nitrate cannot be applied to the soil simultaneously with pesticides and herbicides. It is also unacceptable to simultaneously liming the soil with lime, which destroys calcium nitrate and makes it unsuitable for absorption by plants.

Fertilizers with which calcium nitrate should not be combined:

  • superphosphate;
  • other fertilizers with nitrogen;
  • growth stimulants.

You cannot use manure and humus at the same time as calcium nitrate; it is better to wait at least a week between these feedings.

The fertilizer combines well with urea and wood ash.

When do you fertilize?

When planting strawberries in a new place in spring or autumn, they need to be fed a week after transplantation. The land for planting is also enriched by adding peat, nitrophoska, and wood ash.

In summer, feed strawberries during the fruiting period, when the plant needs potassium (early June). Potassium sulfate, potassium humate or wood ash are recommended for use.

There is a scheme for feeding strawberries during the season: spring, summer, autumn.

Autumn feeding

After harvesting, it is necessary to carry out preventive treatment against diseases and pests. The deadline for applying fertilizers should be moved to mid-September - early October.

Feed strawberries with a complex of chemicals with a low nitrogen content. Phosphorus will prepare the bushes for winter and help them recover for the next harvest. Recommended for use are simple superphosphate or double superphosphate, potassium monophosphate.

Spring feeding

  1. The first application of fertilizer in the spring is carried out as soon as the snow melts. The signal for feeding is the first two or three leaves on the bush at the end of March. Fertilizers with a high nitrogen content are used, such as ammonium nitrate, urea or cow and poultry humus.
  2. The next treatment is in the spring - before flowering (late April) . It prolongs flowering time and promotes ovary formation. At this stage, complex fertilizers containing essential elements are used. These can be Nitroammofoska, Kemira Lux, Master for strawberries.

Rules for storing calcium nitrate

It is best to store calcium nitrate in airtight bags and in rooms with low humidity levels. In damp rooms, granules will accumulate moisture, and under its influence, chemical compounds will decompose. As a result, the powder will become unsuitable as a fertilizer.

It is better to prepare solutions for root and foliar feeding immediately before processing. It is not advisable to store leftovers for similar reasons: plants will not be able to absorb substances obtained as a result of the breakdown of the compound under the influence of water.

How to grow more crops?

Any gardener and summer resident is pleased to receive a large harvest with large fruits. Unfortunately, it is not always possible to obtain the desired result.

Plants often lack nutrition and useful minerals

In such cases, our readers recommend using innovative biofertilizer BioGrow.

It has the following properties:

  • Allows you to increase yield by 50% in just a few weeks of use.
  • You can get a good harvest even on low-fertility soils and in unfavorable climatic conditions.
  • Absolutely safe.

Nuances of use on different crops

The exact dosage can be found in the instructions for use from the manufacturer - calcium nitrate is available in different versions, with the addition of excipients. You can find approximate dosages and recommendations for use on different crops below.

For cucumbers and tomatoes

Good results are obtained by foliar feeding with a solution of calcium nitrate (2 g/1 l of water). Processing of cucumbers begins with the appearance of the third full leaf until the ovaries form. The interval between spraying is 10 days. This method stimulates plant growth and prevents the development of fungal infections of the stem.

Tomatoes are fed with calcium nitrate 2 weeks after planting them in open ground and before flowering. It is best to apply fertilizer to the ground in the form of a liquid solution or by embedding granules into the soil and then watering it. This feeding stimulates the development of the root system, which is especially important for tomatoes.

For cabbage and potatoes

Calcium nitrate is used when preparing a place for planting cabbage seedlings. To do this, add a teaspoon of powder to each hole, then sprinkle it 2-3 cm with soil so that there is no direct contact with the roots of the young seedlings.

The nutritional value of the soil is important for cabbage; it is better to apply mineral fertilizers immediately before planting the seedlings in open ground. This is why calcium nitrate is not added when digging cabbage beds in the spring: its effectiveness will be several times lower.

Calcium nitrate promotes the growth of potatoes, so on clay soils with an acidic reaction, it is placed in a hole along with ash, then lightly sprinkled with earth. Another option is to apply it to the ground before the first hilling. The dosage in this case should be determined by the instructions for use.

For hot and bell peppers

Peppers often suffer from blossom end rot, a disease caused by a calcium deficiency in the soil. When the first signs of the disease are detected, calcium nitrate (the same Fertik) is added in the form of a 0.2% solution. If necessary, the fertilizer application is repeated after 10 days.

It is important to stop fertilizing after the ovaries form.

For strawberries

It is acceptable to use calcium nitrate to feed strawberries in order to prolong fruiting and improve the taste of the berries. The method of root feeding is used. To do this, 25 g of powder or granules are dissolved in 10 liters of water. Consumption rate - 1 l/sq.m.

You need to fertilize strawberries with calcium nitrate carefully, at the root, so that the solution does not get on the leaves and stems. It is advisable to do this in the evening or early morning. After applying fertilizer, strawberries need to be watered.

Repeated application is permissible immediately after harvesting, but not in the fall. In autumn, calcium nitrate is not used on strawberries.

For fruit trees and shrubs

Fruit trees need fertilizer only when there are signs of calcium deficiency. These include yellowing and deformation of the leaf blade, stunted growth, shedding of ovaries and damage to growth points.

The dosage depends on the crop and its age, usually indicated on the package. The average dosage is 30 g/10 l of water, but it can be adjusted down or up. Foliar feeding is acceptable, but the air temperature should be within 10–15 °C. It is advisable to carry out the treatment before flowering begins.

The consumption rate for shrubs is up to 2 liters per bush, for mature fruit trees (from 5 years old) - 1–1.5 buckets. A third or half of a bucket is poured under the seedlings.

For flowers and ornamental shrubs

Calcium nitrate has a positive effect on all flowering plants, including perennial flowers. With regular and correct use, leaves grow faster and the likelihood of putrefactive processes developing on the stems is reduced. Typically, root feeding is used by dissolving a teaspoon of powder in a liter of water. The consumption rate is 1.5 l/sq.m of flower bed. You can also use foliar feeding by dissolving 2 g of powder in 1 liter of water.

Not all ornamental shrubs need calcium nitrate feeding. You cannot fertilize with this substance:

  • any coniferous plants;
  • ferns;
  • heather;
  • hydrangeas;
  • azaleas

These plants prefer an acidic environment; alkaline calcium nitrate will have a detrimental effect on them.

Some plants like slightly acidic soil, these include:

  • honeysuckle;
  • decorative maple;
  • viburnum;
  • barberry;
  • chamomile.

Calcium nitrate can be used for them with caution and only if necessary. The dosage and frequency of treatment should be reduced.

The fertilizer is best suited for phlox, dahlias, lilies, gladioli and clematis.

Useful properties for tomatoes

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

Almost all fertilizers, except calcium nitrate, contain the element in a form that is difficult for plants to reach. When applied in the fall, it begins to “work” only in the spring, and the peak of absorption occurs in the 2-3rd season.

But tomatoes without Ca will develop poorly, develop blossom end rot, will not be able to grow roots, absorb other nutrients, or absorb water, and if there is a critical shortage of the element, they will die. 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 simultaneously grow green mass and root system.
  2. After the ovaries appear, it satisfies the need for nitrogen. Due to the low content of the element (13-15%), when used correctly, it does not lead to fattening.
  3. Strengthens the root and allows it to develop normally.
  4. Calcium increases the resistance of tomatoes to negative factors: temperature changes, waterlogging, drought.
  5. It prevents the crop from contracting blossom end rot, and if a problem appears, it quickly eliminates it.
  6. The use of calcium nitrate increases the sugar content, improves the taste, increases the yield and shelf life of tomatoes.
  7. Deoxidizes the soil a little.

Features of application for seedlings

When growing seedlings, especially in purchased ready-made soil, calcium nitrate is not used. Only in case of signs of calcium deficiency - dying off of growing points, deformation of leaves, curvature of the stem in the shape of a hook, you can use fertilizers for foliar feeding

To do this, plants are sprayed with a solution at a concentration of 0.2% early in the morning or after sunset. To prepare it, 2 g of calcium nitrate is diluted in 1 liter of water.

If there are no signs of calcium deficiency, the seedlings are fertilized with this substance only after planting in open ground after 7–10 days. This technique will stimulate root growth, which means the seedlings will take root faster and begin to develop normally.

Fertilizing seedlings with calcium nitrate is advisable on acidic or severely depleted soils.

Making calcium nitrate with your own hands

If it is impossible to buy calcium nitrate or you want to experiment, you can make it yourself. To do this you will need ammonium nitrate, water and slaked lime.

Method for obtaining calcium nitrate:

  1. Dissolve 300 g of ammonium nitrate in 0.5 liters of water.
  2. Pour the solution into a saucepan with a volume of at least 3 liters.
  3. Boil.
  4. Gradually add 140 g of slaked lime. It should take at least half an hour to add this volume, and the portions should be very small.
  5. Keep on fire until the smell of ammonia disappears.

Allow the solution to cool. Lime will fall to the bottom in the form of a dark sediment. Once it all settles, you get a clear solution of calcium nitrate. It is carefully poured into another container so as not to shake it and used for root feeding of plants.

For safety reasons, work outdoors, protect your eyes, respiratory organs and lessons from contact with vapors and substances.

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