Foliar nutrition of cucumbers with urea, boric acid, calcium nitrate


For the full development of cucumbers requires the flow of nutrients. Foliar nutrition of cucumbers allows to provide them with minerals, protect against diseases and pests. Processing is performed by spraying the stems, leaves and inflorescences of cucumbers. Fertilizing should be carried out regularly throughout the entire life cycle of plants. Such measures have a positive effect on the growth of cucumbers and contribute to their fruiting.

Foliar feeding rules

To get the maximum effect from foliar feeding you need to follow a number of rules:

  • When forming sprouts, concentrated fertilizers will not have a beneficial effect on cucumbers. With an excess of nutrients leaves turn yellow and inflorescences fall. Therefore, weak solutions are used first. Over time, their concentration gradually increases.
  • Cucumbers need to be sprayed in the morning or in the evening when there are no sun rays. When exposed to the sun, some substances cause burns on cucumber leaves. Another condition is the absence of rain and wind, which is especially important for plants growing in open space.
  • Determine by the appearance of cucumbers, what nutrients they lack, it is difficult. Therefore, it is better to use solutions on several plants. If their condition has improved, then proceed to the processing of the remaining cucumbers. Another option is the treatment of complex fertilizer.
  • Spraying is more often used for preventive purposes. Processing is necessarily carried out in cold weather, when the root system of cucumbers cannot fully function.
  • Organic fertilizers are not used in the heat.
  • Extra root processing is carried out in the morning or in the evening surely in cloudy weather.

Attention! Spraying is an effective method that improves the condition of cucumbers in a few hours.

Non-root cultivation of cucumbers is distinguished by its economy. All the beneficial substances are stored on the leaves of plants for several days. At different stages of development, certain microelements are required for cucumbers. Active growth is possible due to nitrogen, and the formation of the fruit requires potassium.

Time spending

A foliar dressing of cucumbers is carried out at each stage of cucumber development:

  • before flowering;
  • before fruiting;
  • at harvest time to extend his life.
Important! Spraying is necessary when cucumbers are deficient in nutrients.

At the same time, the leaves of the plants turn yellow, the shape of the fruit changes, and the inflorescences fall. Then top dressing will be a mandatory measure of support for cucumbers.

Feeding methods

Foliar nutrition of cucumbers in the greenhouse involves the use of special solutions containing water and mineral substances. Spraying is performed using a special watering can or spray with a fine nozzle. In the open field, processing is carried out in the absence of rain and wind.

Urea use

Urea is a common fertilizer that comes in the form of granules. This substance is for cucumbers a source of nitrogen, necessary for the full growth and development of plants. This is a universal fertilizer that dissolves well in water.

Important! With a lack of nitrogen, cucumbers slowly develop, have a weakened appearance. The leaves lose their bright color, become pale or turn yellow.

The first dressing with urea is performed during the growing season. First sprayed cucumber seedlings, transferred to open ground or greenhouse. The following feeding is made before the formation of fruits.

Urea should be stored in a dry place, where moisture is excluded. How much you need to take substances for spraying depends on the type of crop being treated.

Tip! For spraying cucumbers need to be diluted in 10 liters of water 15 g of urea.

When processing leaves with urea, cucumbers get nitrogen, which is quickly absorbed and promotes the emergence of new shoots. Urea is used to control pests. An additional effect of its use will be to protect cucumbers from weevil and aphids.

Boric acid

Due to boric acid you can get a good harvest and protect cucumbers from diseases. After spraying this substance, the plant is saturated with oxygen, and the fruit - with calcium. As a result, improves the taste of cucumbers.

Seed treatment with boric acid increases their germination, normalizes metabolic processes, strengthens the immunity of seedlings.

Important! Processing with boric acid is performed before the flowering of plants.

It is not recommended to constantly use boric acid. The second feeding is made when forming the ovary. To attract pollinating insects, add honey or sugar to the solution. Boric acid is necessary for the following adverse symptoms:

  • leaves have yellow spots;
  • formed a small number of ovaries;
  • fruits fall.
Tip! 10 g of water requires 10 g of acid.

The substance dissolves only in warm water. Therefore, first the solution is made in a small volume of water, then cool water is added for spraying.

On the basis of boric acid various means are issued. For foliar feeding cucumbers suitable drug "Mag-Bor." One package is diluted in water and then sprayed on the stems and leaves of cucumbers.

Calcium Nitrate

Calcium nitrate belongs to alkaline fertilizers, soluble in water. The substance contains calcium, which is quickly absorbed by cucumbers. Calcium nitrate is effective even under adverse conditions: cooling, high humidity, no precipitation. The use of the substance has the following effects on cucumbers:

  • cell walls and membranes are formed;
  • the metabolism and work of enzymes is activated;
  • increases the resistance of cucumbers to stress factors;
  • the plant becomes immune to diseases;
  • increases the storage time of the fruit;
  • productivity, appearance and taste of cucumbers increases.

To saturate the cucumbers with calcium, a solution is prepared containing 1 l of water and 2 g of calcium nitrate. The first spraying is performed after the third leaf appears on the seedling. The procedure is repeated every 10 days before the start of fruiting. Calcium nitrate protects cucumbers from diseases, ticks and slugs. After treatment, the effect persists for a long time, and plants acquire additional immunity to pathogenic bacteria.

Spraying iodine

In the flowering stage, cucumbers are especially susceptible to diseases. For their prophylaxis, cucumbers are sprayed with a solution containing iodine. The procedure begins after the appearance of the third and fourth leaf cucumbers. The solution is prepared by mixing 30 drops of iodine, 1 l of milk and 10 l of water. Additionally, soap is added to it, so that the liquid remains on the leaves longer.

Tip! A solution based on milk and iodine is used every 10 days.

At the expense of iodine, pathogenic bacteria are destroyed, causing the development of root rot, powdery mildew and other diseases. Milk forms a film on the surface of the sheet that protects against pests.

Important! Non-fat milk is selected for spraying to provide foliage access to oxygen.

If signs of the disease have already appeared, then a more concentrated solution is required. To obtain it requires iodine and water in a 1: 2 ratio. The solution is sprayed on the stems and leaves of cucumbers. The affected parts of the plant must be removed and burned to avoid spreading the disease.

Comprehensive dressing

Cucumbers are useful complex feeding, including several types of nutrients. This requires two types of solutions consisting of macro- and microelements. The solution of macronutrients is prepared in 10 liters of water and contains:

  • urea - 20 g;
  • superphosphate - 10 g;
  • potassium sulfate - 7 g

Trace elements are diluted in 10 ml of water:

  • ammonium - 0.01 g;
  • copper sulphate - 0,008 g;
  • magnesium sulfate - 0.18 g;
  • boric acid - 0.2 g

For 10 liters of solution with macronutrients you need 10 ml of liquid containing trace elements. 300 ml of prepared solution is required per square meter of cucumber beds.

Folk methods

Traditional methods of feeding cucumbers are no less effective than the use of chemical components. Such products contain safe substances that are affordable and available in stores.

Yeast solution

Yeast contains carbohydrates, proteins, vitamins, minerals. When dissolved in water, compounds are formed that positively affect the growth of cucumbers.

Yeast fungus has a high resistance. It retains its viability under mechanical stress, high and low temperatures. However, the fungus does not withstand the aggressive effects of other microorganisms.

Tip! Yeast should not interact with chopped grass or manure.

First, prepare a solution containing fresh yeast and warm water in a ratio of 1: 5. For spraying cucumbers 5 more parts of water are added to it. Another solution is the use of dry yeast. First, heated 3 liters of water to a temperature of up to 38 degrees, which add 10 tablespoons. sugar and 10 g of yeast.

Attention! The solution will require a capacity of 6 liters or more, because at the expense of the yeast the mass of the solution will increase.

After mixing the components, the solution is left for 5-10 hours. Stir the mixture periodically. For the preparation of yeast solution is best to choose the morning time, and feeding in the evening.

The final solution contains 3 liters of starter and 7 liters of water. You can use the tool every week. One plant is enough 1 liter of solution. Yeast feed is used for both spraying and irrigation of cucumbers. After spraying the cucumbers with a yeast top dressing a few days later, the leaves turn bright green, more inflorescences are formed.

Bread infusion

An alternative means for yeast is bread infusion. The composition of the bread also includes yeast, which have a beneficial effect on plants. For processing cucumbers, a loaf of bread is taken, which is drawn in a bucket of water. After a day, you need to knead the bread and add 10 ml of iodine. 1 l of bread infusion diluted with 10 l of water. The resulting tool is used for spraying cucumbers every 5 days.

Ash treatment

Ash serves as a universal fertilizer for cucumbers, which is introduced into the soil and used for spraying. Ash is formed after the complete combustion of organic matter. For spraying suitable substance obtained after burning wood or plant residues. If plastic or garbage remains are present in the ashes, then it is not used for fertilizer. Ash contains useful components necessary for the growth of cucumbers: calcium, potassium, magnesium, phosphorus.

Tip! Spraying solution is prepared from 100 g of ash and 10 l of water.

The product is infused for a week, after which they sprayed cucumbers. To keep the solution on the leaves longer, add 50 g of soap to it. Processing takes place every 10 days.

Foliar fertilization of cucumbers with a solution containing ash protects plants from aphids and other harmful insects. Ash is also used as a preventive measure to protect cucumbers from powdery mildew.

Infusion on the onion peel

Onion peel has a complex effect on cucumbers, which receive the necessary additional feeding and protection from harmful bacteria. Onion peel contains a complex of useful substances: vitamins, phytoncides, antioxidants, organic acids, potassium, manganese, iron, phosphorus. Husk stimulates the development of cucumbers, enhances their immune properties.

Tip! Onion husks are used when yellow leaves appear on cucumbers.

For the preparation of onion dressing requires 20 g of husk and warm water of 5 liters. Infusion is left for 4 days, then filtered. The resulting husk is used for mulching the soil.

Onion solution is indispensable in the fight against aphids, spider mites, as well as diseases of cucumbers. If there are signs indicating the presence of disease or pests, treatment is carried out every 5 days.

"Herbal tea"

The so-called herbal tea for spraying cucumbers is prepared on the basis of any weeds (nettle, wood louse, sow thistles). The stems and leaves of plants are crushed, then poured water in an amount of 10 liters. In a week, he gets ready fertilizer. "Herbal tea" is used for watering or spraying cucumbers. With it, cucumbers are saturated with nitrogen.

Tip! Instead of weed, for the infusion used hay.

Infusion on fresh hay is prepared within 2 days. They sprayed cucumbers at the fruiting stage to extend the life of the plants. An additional action of the infusion is protection against powdery mildew and other diseases.


Foliar nutrition supplies cucumbers with nitrogen, phosphorus, calcium and other microelements. To obtain solutions used minerals that are diluted with water. Spraying is necessary at each stage of cucumber development. Folk sprayers are no less popular with gardeners. They do not require large expenditures and at the same time provide additional nutrition for cucumbers.