Composition and instructions for use of Ammophos, how to dissolve the fertilizer in water

Ammophos is widely used in gardening; it has a comprehensive effect. It is used to fertilize crops deficient in nutrients. Phosphorus deficiency leads to reduced crop productivity and decreased absorption of nitrogen and other nutrients. Ammophos helps increase plant fertility and normalize their growth and development. Its low price—approximately 35 rubles—is a significant advantage, distinguishing it from expensive organic fertilizers and others. Before using it, it's important to familiarize yourself with all the details.

Active ingredients, description

Ammophos is an effective type of phosphorus fertilizer used during sowing and various stages of vegetation. Its formula is a complex concentrate obtained by neutralizing orthophosphoric acid with ammonia. The phosphorus contained in the fertilizer is highly water-soluble and quickly absorbed by plants. It is important to fertilize crops during their growth period. During this period, phosphorus supplementation is especially necessary for healthy root development and easy nitrogen absorption.

Active ingredients:

• nitrogen, 12%;
• phosphorus, 15%;
• potassium, 14%;
• sulfur, 14%;
• magnesium.

The fertilizer poorly absorbs moisture from oxygen but dissolves well in water. This allows it to be used as a solution for foliar and root feeding. A chemical reaction during its production produces 10% ammonia and 50% phosphorus. This ratio is ideal for plants. The herbicide is available as granules up to 3.5 mm in size under brand "A" and as a powder under brand "B."

1. Granulated ammophos is recommended for local use before sowing.
2. Ammophos "B" is used as a base and top dressing for continuous crops. These include perennial grasses in forage fields, natural lawns in parks, and sports fields.

For retail consumption, ammophos is sold in soft containers or polyethylene bags. When purchased by large agricultural enterprises, the fertilizer is shipped in bulk.

How effective is the product?

When used correctly, ammophos fertilizer has the following effects:

• develops a powerful rhizome;
• improves the taste of fruits;
• increases resistance to bad weather;
• increases crop yield;
• extends the shelf life of fruits.

If you ignore the instructions and dilute the substance incorrectly, there will be no effect.

Pros and cons

The chemical composition suggests a number of positive and negative qualities that need to be examined.

Pros	Cons
The composition can be applied at any time, except during the cold season.	Care must be taken when handling fertilizer.
The fertilizer is non-toxic, does not absorb excess nitrogen, and does not increase the nitrate content in the finished fruits.	If the dosage is not observed, the acidity level in the soil will increase.
Due to the balanced content of elements, they are effectively absorbed by the plant
The composition is easily soluble in water and can be used in any form.
The complex is used as a fertilizer during crop growth and as a primary fertilizer during planting.

Rules for application to soil

Ammophos is first added in the fall, when the soil is tilled. The fertilizer is applied to trees and bushes, then incorporated into the soil. Further application is carried out in the spring, in March, when the snow melts. Ammophos is scattered over the soil surface. The melting snow dissolves the fertilizer, drawing it into the soil.

A complex fertilizer is also added to crops at least three times per season. Fertilization is stopped in August, as nitrogen stimulates the growth of green mass, which is undesirable in the fall. Fruits, not foliage, should ripen. Young shoots of trees and bushes are unnecessary; they will die in winter.

Dilution of the product

Place the chemical granules in a prepared container and add warm water at a ratio of 1:3. Stir the mixture thoroughly and let it dissolve for 2-3 days. Sediment at the bottom is normal. Ammophos can be combined with ammonium nitrate, urea, nitrophoska, potassium salt, and potassium chloride only before using the solution. Do not mix the substance with lime, ash, or manure.

Fertilizer can be added to a hole near the rhizome using drip irrigation through a separate container connected to the system.

It's recommended to administer the combination 15 minutes after starting irrigation for 30 minutes. Then, continue watering for 30 minutes. Before spraying, it's important to introduce the solution into the drip irrigation system without any sediment to prevent clogging.

Official annotation

Potatoes require nutrients, and ammonium phosphate (AMP) is often necessary. Add 1 tablespoon of it to each hole when planting the vegetable. 2.5 kg of ammonium phosphate is used per 100 square meters of land. This substance increases the starch content of the tubers, enhancing their nutritional value and flavor. Diammophoska is still used as a potato fertilizer..

Precautionary measures

The chemical is nonflammable and nonexplosive, but requires safety precautions. These include:

• wear protective clothing and gloves;
• protect the respiratory tract with a mask;
• avoid contact of the chemical with exposed skin and mucous membranes;
• After treatment, wash your face and hands with soap.

If the substance comes into contact with mucous membranes, immediately rinse with purified water. If accidentally ingested, induce vomiting and immediately call a qualified healthcare professional.

Storage rules and duration

Like any chemical, ammophos should be stored properly. Opened sachets should not be stored; any leftovers should be transferred to a tightly sealed, non-metallic container. Store the product in a low-humidity area at temperatures between 0 and 30 degrees Celsius. Keep it out of reach of children and animals. The shelf life is 9 months.

Analogues of the product

There are a number of fertilizers similar in their mechanism of action to ammonium phosphate. They differ in price and composition.

1. Nitroammophos. This product contains a combination of ammonium phosphate and ammonium nitrate. The mixture is high in nitrogen and works best on low-humus soils. This substance can cause nitrate accumulation and acidifies the soil.
2. Nitrophoska. This fertilizer contains ammophos, ammonium and potassium nitrate, calcium hydrogen phosphate, and potassium chloride. It is a dense NPK complex enriched with calcium. It can be used without additional potassium additions. It strongly acidifies the soil, contains chlorine, and promotes the accumulation of nitrates.
3. Nitroammophoska. In addition to ammophos, it contains potassium chloride and ammonium chloride. This fertilizer complex contains a high amount of nitrogen and does not require additional nitrogen or potassium fertilizers. It is not suitable for plants sensitive to chlorine.
4. Ammophoska. This is a combination of ammophos, ammonium sulfate, and potassium sulfate. A complete fertilizer complex containing a lot of nitrogen. It strongly acidifies the soil.

When analyzing the fertilizers listed, it can be assumed that ammophos has only two disadvantages: the absence of potassium in the composition and a lower nitrogen content. The main advantage of this product is that it can be used without fear of nitrate accumulation in fruits and leaves. Compared to its analogs, ammophos has fewer restrictions on application times and the crops it can be used for.

Reviews of the drug

Feedback on ammophos is generally positive. This will help you understand its effectiveness and learn about its pitfalls.

Grigory Antipov, 60 years old, Kyiv

Hello! I fertilized my potatoes with ammophos in the summer of 2025. The results were immediate. My yield increased, and I harvested about 50 kg of potatoes from 10 plants. The potatoes are large and healthy. There were no Colorado beetle attacks this year. I applied ammophos three times over the summer. I supplemented my care with regular weeding and watering.

Anna Nikitenko, 59 years old, Moscow

Hello everyone! I've been using ammophos for over five years, fertilizing potatoes, beets, and zucchini. The plants bear fruit abundantly, without delays, and the harvest is good. I sell the fruit with a bang and share it with my neighbors. Compared to growing vegetables without ammophos, the taste wasn't as good. I applied the fertilizer myself and it didn't cause any problems.

Oleg Orlov, 39 years old, Zaporizhzhia

Hi everyone! A neighbor recommended fertilizing my tomatoes with ammonium phosphate fertilizer. I'm wary of chemicals, but I decided to give it a try. I fertilized the tomatoes with a solution diluted according to the instructions three times a year. The tomatoes became a richer color, tastier, and the harvest increased.