Sapropel as a fertilizer: description, rules of use

What is sapropel

Sapropel is a unique natural fertilizer that is formed from the remains of plant and animal origin at the bottom of freshwater reservoirs. Many people think that sapropel can be found in rivers and ponds. However, this resource accumulates only in stagnant lakes.

Advice: many people confuse river silt with sapropel, but these are substrates with different compositions.

This substance accumulates at great depths for decades. Due to its high mineral content, the product is used as a soil fertilizer.

Interesting: sapropel as a fertilizer was developed back in Ancient Egypt and Mesopotamia. The black slurry was added to the soil after harvesting.

The mud substrate is obtained in a ready-made form. The largest reserves of this natural resource are in the Central and Far Eastern regions. Natural material is also collected in the Urals and Siberia. Biological material is removed from the bottom of the reservoir using technology. Huge hoses pump dirty viscous liquid into containers - this is sapropel. It does not need to be processed or changed in composition. In its pure form, the material is only dried to the state of crumbly earth and packaged for ease of use.

Fact: the effect of using sapropel lasts about 8 years.

Where and how is it mined?

There are many reserves of sapropel in Russia, primarily in the Central and Far Eastern districts. In addition, many different lakes located on the territory of the Northwestern, Ural, and Siberian economic regions also store its reserves.

To extract this natural raw material, both special equipment and dredgers are used to lift it to the surface. After which it is delivered to the shore, dehydrated and processed, producing sapropel (fertilizer) or other products.

Advantages of sapropel

Nature itself knows more about what it needs for fertility. Therefore, sapropel has incredible advantages over man-made fertilizers.

Product advantages:

• is a natural product, does not contain chemicals;
• improves soil fertility;
• increases the yield of any crop up to 100 percent;
• prolongs flowering;
• increases plant viability;
• has a bactericidal effect;
• accumulates nutrients;
• stimulates root development;
• helps the soil control water and gas exchange;
• loosens clayey, heavy soils;
• used in medicine and cosmetology.

Fact: sapropel is an absolutely safe product for both the soil and plants.

Beneficial features

In crop production, sapropel is considered one of the best organic fertilizers. Among the advantages of using a natural supplement:

• stimulating the growth and development of crops;
• increasing productivity indicators;
• increasing the duration of flowering in ornamental plants;
• improving the taste characteristics of fruits and vegetables;
• increase in the survival rate of seedlings and seedlings.

Experts recommend storing root vegetables in powdered sapropel. They do not spoil, do not dry out, and retain their taste and juiciness perfectly.

Raw materials extracted from the bottom of reservoirs are a good help in situations where it is necessary to improve the quality of the soil on the site. Positive action is expressed in the following:

• soil enrichment, saturation with humus;
• increasing moisture capacity;
• change in the structure of heavy (clayey) soils, which become light and loose;
• cleansing of pathogenic microorganisms, soil improvement;
• increasing fertility.

Limestone-type raw materials are suitable as a deoxidizer for soils with high pH.

On a note! It is enough to enrich the soil once every 4-7 years.

Experts note that proper application of sapropel is similar to completely replacing the soil on the site, but the result is achieved faster and at lower financial costs.

The advantages of this type of fertilizer are highlighted:

• more effective than manure, compost, peat (rich in nitrogen);
• has no specific odors;
• does not contain pathogenic bacteria or weed seeds;
• non-toxic for humans and animals;
• can be used all year round;
• prolonged period of action (up to 7-8 years);
• ease of application.

The raw materials are environmentally friendly and can be used for a wide variety of crops and on any type of soil. The main thing is to carefully study the description, instructions and work with the additive correctly.

Composition of the product

Chemical and biological processes occurring in a rarefied aquatic environment form a viscous mass that is saturated with elements favorable to soil and plants. The composition of sapropel is truly extraordinary. It contains decomposed remains of animals and plants, and mineral elements such as ash, sodium, potassium, phosphorus, copper, zinc. As well as humic and amino acids, growth stimulants, beneficial microflora, vitamins A, E, B2, B5, B12 and others. Sapropel is simply a storehouse of vitamins, enzymes and carotenoids.

Interesting: the word “sapropel” comes from the Greek “sapros” - rotten and “pelos” - silt, dirt.

Sapropel consists of organic and mineral parts. Depending on their proportions (ash content and organic matter), sapropel is distinguished:

• mineralized (consists of 80-85% useful substances);
• mineral-organic (50-70%);
• organomineral (30-50%);
• organic (up to 30%).

Each species has its own color. For example, sapropel with a low content of useful substances is colored black. Suspensions richer in vitamin content are gray in color.

Fact: sapropel is a healer of the earth, also created by the earth itself. It is the only fertilizer that has the properties to heal the soil and nourish plants.

What it is?

Sapropel is a natural product that is formed naturally at the bottom of fresh water bodies. The remains of plants and animals that sink down to the bottom surface decompose due to the action of microorganisms living in an environment with low oxygen content. As a result of physical-mechanical, biochemical and microbiological processes, a stable suspension is formed over time, which, in addition to organic components, includes various inorganic components and mineral impurities.

Types of sapropel

Since the soil in reservoirs differs in composition, the sapropel formed is different. There are four types of this product:

• carbonate;
• organic;
• glandular;
• siliceous.

Depending on the type of sapropel, the method of its use is determined.

By type of processing there are:

• granulated;
• loose;
• pasty;
• liquid.

As a fertilizer, it is better to work with sapropel in granular and bulk form.

Bulk mixtures are easier to use over large areas on an industrial scale, as it is easier to spray over the field. For example, loose powder is used to restore land after its unfavorable use (in places where there were landfills, chemical waste accumulated, in areas where drilling operations were carried out).

Sapropel in liquid or paste form is applied to the soil when changing crops.

Description of Sapropel fertilizer

“Bottom humus” is another name for sapropel, which looks like ash – a bluish powdery substance. The product in granules and tablets has the same color. An important property of the fertilizer is that when processed, dried, granulated, it does not lose its natural properties: minerals P, Fe, Mg and many others.

The beneficial properties of the fossil are an inexhaustible source of mineral and vitamin compounds. After processing, the fertilizer should feel moist and crumbly to the touch. The liquid form of the product is not suitable for feeding plants; it is used to restore depleted fallow land.

It “works” equally successfully with medicinal mud and is used in balneotherapy in sanatoriums and health centers.
This medicinal substance strengthens the immune system and treats skin diseases. Microelements contained in sapropel improve skin metabolism and enrich the skin with nutrients at the cellular level. Important! By its nature, the substance contains very little phosphorus, so experienced summer residents, in combination with Sapropel, use other mineral products to fertilize their gardens.

What it is?

Several varieties of sapropel are mined in the lakes. They differ in the composition of minerals. The most significant for enriching the soil and growing cultivated plants is the organomineral fertilizer Sapropel; when extracted from the lake bottom, it is distinguished by its black color. When a substance rises from the bottom in a jelly-like or liquid form, this indicates the content of ferrous compounds, which exclude the possibility of using a natural resource as a fertilizer.

Gardeners know that it is necessary to fertilize the soil with Sapropel in the fall, once every 3-5 years. The long-term effect of the fertilizer components during this time perfectly improves the quality of the soil. But you can feed plants individually, taking into account that each crop requires its own proportions of fertilizer.

The modern fertilizer Sapropel is a product with soil-forming properties; it nourishes plantings and at the same time increases soil fertility. There are several types of Sapropel, differing in the percentage composition of minerals.

In crop production, the most effective are two types:

• organic;
• organomineral.

They are recognized by their almost black color. They are taken out from the bottom almost ready for processing. In each regional lake, the extracted bottom fertilizer has its own composition.

According to the regional location of the lakes, varieties of sapropel are distinguished with:

• carbonate characteristics;
• organic;
• glandular;
• siliceous.

Crop growing finds application for each type of fertilizing.

Important! Sapropel fertilizers increase productivity up to 100%, which happens in the first season in the garden.

Advantages of Sapropel

The high advantages of Sapropel over various organic fertilizers are due to the high content of micro- and macroelements, due to which it significantly improves soil biological processes.

Advantages of sapropel series fertilizers over:

1. Peat. Sapropel contains a lot of nitrogen. No other natural resource, neither peat nor shale, contains so much nitrogen. It also contains more organic matter than peat.
2. Animal composts. There are no weeds, no pathogenic bacteria and flora in Sapropel. Long-term storage in closed bags does not result in nitrogen loss.
3. Fertilizers of chemical origin. Bottom fertilizers are environmentally friendly and have no toxic effects on the environment. It is safe for a person to work with such fertilizers, even without using protective equipment.

Important advantages of Sapropel:

• improves the natural qualities of the soil;
• is an environmentally friendly product;
• significantly increases productivity;
• retains moisture in the ground;
• cleanses the soil of bacteria and fungi;
• develops a strong root system of all plants;
• benefits the earth for a long time, up to 5-7 years.

There are no questions about how to use Sapropel as a fertilizer. The timing and methods of introducing it into the soil are the same as for other organic means. Before plowing, Sapropel is scattered throughout the garden, even if plowing is delayed due to domestic or weather conditions, nitrogen from the fertilizer is not lost.

Need to know! Heavy, wet, clay-containing lumps of bottom soil are living sapropel, not fertilizer. The extracted raw material becomes an organic fertilizer only after processing by drying, grinding, and granulating.

Compound

Plants and animals dying in the pond settle to the bottom so densely that oxygen access to this layer is limited. This is how natural bottom substance is formed; under natural conditions, bottom soil is transformed into a homogeneous thick raw material for further extraction and processing.

During the formation of bottom fertilizer, physical and chemical mechanisms occur that last for decades in the reservoir. The longer sapropel matures, the higher the assessment of its geological quality.

Hydrogeologists calculate the content of raw materials and decide on its use as follows:

• mud for medicinal purposes;
• raw materials for the production of fertilizers;
• Eliorants - reclamation agents,
• soil formation.

The different chemical composition of sapropels makes it possible to produce fertilizers that are clean from an environmental point of view and suitable for various uses. Bottom fertilizers differ in the composition of organic and mineral substances, the content of nitrogen, phosphorus, potassium, and sulfur compounds. The organics of sapropels are biologically active substances, humic acids, and vitamins. The quality of the fertilizer depends on the level of ash content, acidity, percentage of silicon and ferrous compounds. These indicators make it possible to combine raw materials when producing fertilizers for various purposes, to combine them with other natural components.

Sapropel fertilizers contain:

• carotenoids;
• enzymes;
• catalase;
• peroxidase;
• reductase;
• protease.

The significance of the fertilizer is given by the content:

• fulvic acids;
• macro- and microelements;
• vitamins – A, E, B2, group B;
• organic substances;
• amino acids;
• ash;
• natural stimulants;
• beneficial microflora.

The ecological purity of Sapropel allows it to be used on any type of soil, for plants, without exception, of any type. The use of Sapropel makes the soil richer and more fertile.

Operating principle

This fertilizer is applied to vegetable and cereal crops, as well as as a top dressing for fruit trees. Sapropel can be used as a separate fertilizer, but you can often find combining fertilizers that contain this amazing substance.

Tip: A quality substrate is usually crumbly and moist. When a substance is viscous and jelly-like in consistency, this indicates the presence of ferrous compounds in it. This sapropel cannot be used to fertilize soil and plants.

For ease of use, a classification of this fertilizer was invented. For example, sapropel is produced under brand A, which can be used to fertilize all types of soils. Grade B is suitable for highly oxidized soils, grade B is used in slightly alkaline soils.

Fact: studies have shown that adding sapropel to the soil increases productivity several times.

What are the benefits of sapropel for soil and plants?

Sapropel is a valuable, natural organomineral raw material widely used in modern gardening. The value lies in the unique properties.

This organic fertilizer, created by nature itself, actively improves soils, and therefore helps improve the quality of life of garden plants.

Sapropel added to the soil:

• activates biological processes in soils,
• increases the quantitative level of organic matter, important macro- and microelements,
• helps improve the mechanical composition of the soil (loosens clay and loamy soils),
• increases soil aeration,
• increases the moisture-saving function, especially on sandstones (perfectly retains water in the soil), thereby saving water resources,
• reduces excessively acidic soil conditions,
• promotes the formation of a fertile layer on damaged soils,
• eliminates nitrates, nitrites, heavy metal salts and dangerous microorganisms in soils.

Organic fertilizer is very beneficial for plants. Fertilizer with sapropel:

• increases the yield and quality characteristics of fruit and berry crops,
• activates the process of seed germination,
• promotes active growth and development of the root system,
• promotes better adaptation of seedlings of tree and shrub species,
• increases the flowering time of flower crops,
• due to the slow dissolution of bioactive substances, it ensures complete nutrition of plants with these substances during all periods of their life,
• used at all stages of plant development and throughout the summer season.

Sapropel has no contraindications for use; it is also a fairly inexpensive and economical material.

Sapropels are also promising for minimizing the harmful effects of industrial waste on soils. Humic acids contained in organic sediments form strong compounds with metal ions and, therefore, serve as a powerful geochemical barrier to potentially hazardous substances.

To improve garden lands, sapropel was used as a fertilizer already in the 19th century. Currently, sapropel fertilizers are actively used in gardening for all soils and plants, since it increases the level of organic matter in the soil, macroelements important for plants (for example, nitrogen, phosphorus, sulfur), microelements (copper, barium, titanium), as well as enzymes ( for example, catalase) and vitamins (A, D, group B).

Sapropels have many advantages over other types of fertilizers:

• contain a lot of nitrogen,
• have a high heat capacity compared to peat fertilizers,
• organic matter is rich in amino acids, carbohydrates, nitrogen-containing substances,
• in comparison with fertilizers of animal origin, they contain a small amount of residues of unwanted plants and dangerous microorganisms,
• a pure natural product compared to chemicals for plant nutrition and soil improvement.

Taking into account the pH value of soils, sapropel fertilizers come in three grades:

1. A - for all types of soils,
2. B - for soils with pH less than 7,
3. B - for soils with pH more than 7.

Sapropel fertilizers can be used pure or in combination with other fertilizers.

How to use sapropel

Sapropel for soil

To successfully grow a particular type of plant, it is always necessary to enrich the soil for minerals and vitamins. Sapropel was created in order to improve the quality of soil. If the earth is tired or impoverished, then this product is perfect. It helps improve moisture exchange and breathability. If you add sapropel to the soil during autumn digging, then rest assured that the seeds will germinate better, the root system of the plants will be strong, and the fruits will be large and healthy.

Fact: the product works well in clay, sandy and poor soils. With its composition, it improves the structure of the soil, its properties and increases fertility.

Sand is often added to the soil to lighten the soil composition. You can also add sapropel. To do this, distribute the powder over the area at the rate of 3 liters per 1 square meter and dig up the soil to a depth of no more than 10-12 cm. By the way, if you go too far with the amount of organic matter added to the soil, you can oxidize the soil too much. This fact can contribute to the development of pests and diseases.

Thus, by using sapropel, you can get healthy enriched soil with enhanced immunity, which will grow healthy, high-yielding plants. And all this thanks to sapropel alone. And most importantly - no chemicals. Sapropel can be added to compost. To do this, it is mixed with manure or other organic waste.

Tip: to prepare a universal composition, use one part powder and three parts earth.

Sapropel for plants

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When adding sapropel, it is necessary to maintain the correct proportions when planting certain plants. So, when planting crops that are planted with seeds, fertilizer is added to open ground, mixed with soil in a 1:1 ratio. Scheme: 3 liters of substance per 1 square meter of area (digging of the earth should not be deep).

For seedling soil, mix sapropel and soil in a ratio of 1:3. If you add a teaspoon of sapropel to the hole before planting, the seeds will take root better and grow faster.

When planting fruit and berry crops, sapropel is mixed with soil in a ratio of 1:4. The finished mixture is added to the hole. As a top dressing, you can sprinkle the soil near the trunk with sapropel (a layer of mulching for shrubs up to 2 centimeters, trees - 5-7 centimeters), and then loosen it and moisten it well. Usually 2-3 feedings with this fertilizer are done per season.

When growing crops such as zucchini, cucumbers and watermelons, a 4:6:3 scheme is used (sand: soil: sapropel).

For tomatoes, peppers and eggplants the proportions are 1:2:7 (sapropel: sand: soil).

For cabbage and leaf crops, a composition of 2:4:3 (soil: sand: sapropel) is suitable.

For vegetable crops, you can use a combined soil mixture, which includes one part of compost and humus and two parts of sapropel.

Sapropel for flowers

Sapropel is also considered an excellent fertilizer for growing indoor flowers. The product is mixed with soil when replanting plants. In a short time, you can well nourish tired plants with all the necessary elements and significantly improve the health of your home flora.

Sapropel when planting potatoes

For a better harvest, potatoes always need effective fertilizers. It has been experimentally proven that the use of sapropel as a fertilizer when growing potatoes can almost double the yield. Moreover, the fertilizer is very easy to apply, so you don’t need to spend a lot of effort to prepare the required composition, etc. The gardener only needs to add miracle powder to the ground when digging it (at the rate of 3-6 kilograms per square meter) or add a handful of biogenic material to each hole.

Generous feeding can improve the quality of tubers and the entire crop as a whole.

Sapropel is often applied to the ground together with manure in a 2:1 ratio. This fertilizer is prepared 3-4 months before application to the soil, so that the mixture is thoroughly infused.

Instructions for use

What Sapropel is and how to use it in the garden is explained in the Instructions for Use. It has sections - a description of the product, properties to improve the soil, rules for applying to plants. A separate chapter is devoted to applying fertilizer to potatoes and precautions. The instructions for use of Sapropel indicate that this is an organic fertilizer of high ecological purity, used both by direct application to the soil and partly in the preparation of compost.

Submission rules

The fertilizer is not harmful to plants, so it is recommended to take 5 kg of Sapropel per 1 sq. m. Exposure to organic matter reduces the acid content and enriches the soil with micro- and macroelements.

Fields with potatoes can be fertilized with Sapropel up to 120 t/ha. The application of such fertilizing significantly increases the yield. For other vegetables you should take 100 t/ha. On agricultural land, fertilizer is enhanced by combining it with manure, mullein, and compost.

Row crops and vegetable crops require the application of Sapropel at the rate of 50-100 t/ha. Fertilizer application significantly increases the yield of many agricultural plants.

Application in greenhouses

Healthy seedlings grow in greenhouses when Sapropel is mixed with soil at a ratio of 1:10. When transplanting seedlings into the ground, you should add fertilizer directly to the hole. Then the plants take root easily and grow quickly.

The instructions for use will advise how to choose fertilizer in the store according to its brand.

The brand indicates the purpose of using the fertilizer:

A – universal type, for use on any soil;

B – organic fertilizer intended for use on “acidic” soils;

B – for use on neutral or slightly alkaline soils.

The finished fertilizer is sold in wholesale and retail quantities. For this purpose, special bags or standard containers are used. When packaging fertilizer for retail sale, an important condition is ensured - complete preservation of nutritional components.

As a rule, the following packaging is offered for retail sale:

• bulk Sapropel in bags;
• granules in buckets;
• liquid product in tanks.

The instructions for using Sapropel must be carefully read in order to get acquainted with the various properties of this amazing fertilizer, and use them at your dacha with the greatest efficiency.

How to use for plants

The benefits of Sapropel in growing plants have been experienced by many summer residents and homestead owners. It is used in combining soil mixtures.

In plants:

• the quality of the harvest improves;
• plant growth is activated;
• a healthy root system develops;
• seedlings adapt more easily to the ground;
• stimulates plant development in all phases.

Fertilizer benefits plants, all gardeners have known this for a long time. It is used for garden, garden, and ornamental plants.

Use when planting potatoes

The use of sapropel fertilizer on potato fields increases the yield by up to 35%. To do this, 130 tons of fertilizer are applied per hectare. On acidic soil, geotechnicians recommend applying 80–110 t/ha. Biogenic fertilizer is applied to the soil in the fall, when plowing the field for spring planting of potatoes. Additionally, in the spring, when planting root crops, a powdered product is added directly to each hole. There is a way to “bathe potatoes” before planting them. In summer cottages intended for growing potatoes, fertilizer is applied at the rate of 3-6 kg per 1 sq.m. In addition, to preserve the quality of potatoes in storage, they are sprinkled with dry powdered fertilizer in piles.

Often a mixture of Sapropel with manure after compost aging is used in a 2:1 ratio. Fertilizer is purchased in accordance with its composition, which is indicated on the factory accompanying sheets on each package.

Use for soil

High-quality fertilizer Sapropel is used to improve the mechanical structure of the soil, moisture levels, and aeration. Sapropel activates the natural processes of self-cleaning of arable land from pathogenic fungi and organisms.

Today, scientists have scientifically confirmed the benefits of using bottom fertilizer to improve the soil's fertile layer and its air regime. Sapropel reduces the possibility of accumulation of heavy metals from the environment in potato tubers and root crops.

Earth receives:

• saturation with useful substances;
• reducing the frequency of irrigation;
• reduction of nitrate content;
• activation of the life of the earth.

Russia has developed a set of measures for the ecological restoration of land resources and increasing their fertility. Particularly important is the reclamation of sandy quality land, where the layer of soil and turf is recreated. This is how abandoned lands are saved, impoverished after previous human activity - the territory after spent oil and gas wells, sanded by the proximity of the sea and desert. During land reclamation, Sapropel is valid for 7-14 years. For this purpose, a liquid form of fertilizer is applied and evenly distributed during shallow plowing - up to 12 cm, at the rate of 3 kg per 1 sq.m.

Common mistakes when using sapropel

Many gardeners cannot fully appreciate all the positive qualities of this product due to improper use of sapropel.

Typical mistakes of summer residents:

1. Many people use sapropel alone, not taking into account that it does not contain all the elements necessary for the life support of plants (for example, it is low in phosphorus). Therefore, its presence in the soil does not give excellent results. It is better to use the substance in combination with other mineral fertilizers, in combination with which it is more effective.
2. A common mistake gardeners make is to feed the soil with sapropel when digging up the site each year. It is enough to add the substrate once every few years.
3. To feed each crop, certain proportions must be used. After all, what, for example, is good for a tomato is bad for an apple tree.

How is sapropel obtained?

Future garden fertilizer is extracted only from the bottom of stagnant lakes; other bodies of water are not suitable for this. The main conditions for its formation are fresh water (stagnant) and limited access to oxygen. Sapropel is formed over many decades, which means that it contains an incredibly large amount of useful substances.

Do not confuse sapropel with silt. The latter is present in all reservoirs, and its formation takes much less time. But in its composition it is significantly inferior to sapropel

Sapropel extracted from the lake is well dried, after which it turns into a light and free-flowing powder. If this is not done, the organic matter will rot and lose its beneficial properties.

For ease of use, blue powder (similar to ash) is pressed into granules or tablets. It is in this form that sapropel can be found on sale.

Healing properties

Sapropel is used not only in agriculture. Every person can experience its healing properties for themselves. This product is effectively used in sanatoriums and rehabilitation centers for the treatment of diseases of the nervous system, cardiovascular diseases, and ailments associated with the genitourinary system. Sapropel masks are excellent for skin rashes, psoriasis and other dermatological ailments.

In the field of cosmetology, the use of a natural product helps in the fight against excess weight.

Toxicity of the substance

Industrial sapropel, which is sold as fertilizer, is safe. It is classified as a low-hazard substance, which corresponds to hazard class 4.

When extracting independently, it is necessary to check the toxicity of lake sludge, which is associated with the environmental conditions of the extraction site.

The presence of chemical and biological pollutants, including heavy metals, in a reservoir can make sapropel unsuitable for agriculture.

Forms of release of finished sapropel

Adapting sapropel to the needs of gardeners, manufacturers produce it in different forms:

Powder and granulated sapropel have a universal purpose. They are convenient to use in open ground or in greenhouses, where you need to quickly distribute fertilizer over a large area.

Tablets are more often used as an additive to the soil for growing seedlings or in indoor floriculture, where small volumes of sapropel are needed.

The paste-like mass can be purchased for spot planting when transplanting seedlings into the ground or under potato tubers.

Tip #1. Sapropastes can be used to prepare liquid fertilizers. You need to dissolve 300 ml of paste in 10 liters of water and water the plants 3-4 times per season or spray them leaf by leaf.

Current questions about sapropel as a fertilizer

Question No. 1. How to feed old trees in the garden with sapropel?

There are two ways. In the spring, after the soil has warmed up and the leaves have unfurled, spread dry sapropel in a circle around the trunk over the entire area of ​​the crown projection. The minimum dosage is 2 liters per 1 m2 of soil, but if possible, it is better to put more - up to 5 liters. Using a flat cutter, mix the sapropel with the soil surface, water it generously and mulch. The second method is to prepare a liquid fertilizer from sapropaste - 300 ml per 10 liters of water. This solution can be used to feed trees when the buds are awakening, before flowering and in the half-ripening phase of fruits.

Properties of sapropel as a fertilizer

As a fertilizer, sapropel has a lot of useful properties, both for the soil and for the plants themselves:

Sapropel has a prolonged effect. When applied to the soil, it restores it in 2-3 years and continues to maintain a good structure for about 5 years. Unlike many other types of organic matter, this material can be used on any type of soil, regardless of its acidity, and has no seasonal restrictions. You can fill the soil with sapropel at any convenient time.