NPK Fertilizer - The Foundation for Every Plant

NPK fertilizers contain all three basic elements needed for plant growth and development. The abbreviation NPK stands for Nitrogen (N), Phosphorus (P), and Potassium (K) – three macronutrients that play irreplaceable roles in plant metabolism. What Do the Individual Elements Mean? Nitrogen (N) is essential for the formation of chlorophyll and proteins. It supports vigorous vegetative growth, leaf development, and overall plant vitality. Plants deficient in nitrogen show yellowing of older leaves and stunted growth. Phosphorus (P) is crucial for root development, flowering, and fruit formation. It participates in energy transfer within the plant and supports the formation of DNA and RNA. Phosphorus deficiency manifests as purple discoloration of leaves and poor root development. Potassium (K) strengthens plant immunity, improves water management, and increases resistance to diseases and stress. It's important for fruit quality and overall plant hardiness. Potassium deficiency causes browning of leaf edges and weakening of stems. NPK Ratio and Its Significance On fertilizer packaging, you'll find numbers such as 10-5-5 or 5-10-10. These numbers indicate the percentage ratio of individual nutrients. For example, fertilizer marked 10-5-5 contains 10% nitrogen, 5% phosphorus, and 5% potassium. Different growth phases require different NPK ratios : Vegetative phase : Higher nitrogen content (e.g., 10-5-5) for vigorous leaf and stem growth Flowering phase : Higher phosphorus and potassium content (e.g., 5-10-10) for flower and fruit development Universal fertilizers : Balanced ratio (e.g., 10-10-10) suitable for general plant nutrition Types of NPK Fertilizers Mineral fertilizers contain nutrients in readily available form that plants can absorb immediately. They're ideal for quick correction of deficiencies but require careful dosing to avoid over-fertilization. Organic fertilizers release nutrients gradually as organic matter decomposes. They improve soil structure, support beneficial soil microorganisms, and provide long-term nutrition. Popular organic NPK fertilizers include BioBizz and Plagron products. How to Use NPK Fertilizers Correctly Always follow the manufacturer's recommended dosage . Over-fertilization can damage roots and cause nutrient burn. It's better to use a lower concentration more frequently than risk over-dosing. Monitor your plants' response to fertilization. Healthy plants show vigorous growth, intense green coloration, and resistance to diseases. If you notice signs of deficiency or excess, adjust the fertilization schedule accordingly. For best results, combine NPK fertilizers with regular soil testing and proper irrigation. Balanced nutrition is the foundation for healthy plants and rich harvests.

In short: NPK fertilisers supply the three basic plant nutrients: nitrogen for leaf growth, phosphorus for roots and flowering, potassium for resilience. Numbers such as 10-5-5 give the percentage of each. They are mostly worked into the soil before planting; a universal NPK contains 11% N, 7% P2O5 and 7% K2O.

Universal NPK11% N + 7% P2O5 + 7% K2O
NPK with guano5% N + 2% P2O5 + 8% K2O
Basic fertilisation before planting (guano)1.5–2.5 kg per 10 m²
Vegetables and fruit (guano)100–150 g per plant
Balcony flower box (guano)80–100 g per 50 cm
Autumn fertilisation (guano)2 kg per 10 m²

Fertilisers are used to improve plant growth. Continuous cultivation of crops in a limited space leads to very rapid depletion of nutrients from the soil and a reduction in its fertility, making it almost necessary to supply nutrients to the soil through various fertilisers. There are many types of fertilisers, from simple ones containing only one element, through double to triple ones, also called complete fertilisers. Complete fertilisers are a combination of all three basic elements needed for growth - nitrogen (N), phosphorus (P) and potassium (K). The Latin names of these three elements have also given rise to the commonly used designation for complete fertilisers - NPK.

NPK fertilisers combine nitrogen, phosphorus and potassium - the basic elements supporting healthy plant growth. NPK fertilisers are used for basic soil fertilisation at the beginning of the growing season - i.e. before planting. Some plants are very demanding in their consumption of these three basic substances, so they can also be supplied with NPK fertiliser during the season. During the season, NPK preparations are often used to fertilise plants with a short growing period. Special types of NPK fertiliser are designed for autumn fertilisation. The pre-prepared combination of nitrogen, phosphorus and potassium in NPK fertilisers for use in different seasons is an enormous advantage. Gardeners don't have to worry about finding the right ratio of these substances or complex mixing. Application of NPK fertilisers is also very simple - the prepared granules are worked into the soil.

Universal NPK

For universal use, granulated NPK fertiliser with a chemical composition of 11%N + 7% P2O5 + 7% K2O is intended. This type of fertiliser is worked into the soil before sowing and planting. The highest efficiency is achieved in slightly acidic and neutral soils. It is mainly used for fertilising vegetables, orchards, field crops, ornamental plants and vineyards. NPK fertilisers are of great benefit for leafy vegetables. On the other hand, NPK fertiliser is not suitable for fertilising plants sensitive to chlorine (fruit vegetables, flowers). Universal NPK fertiliser granules are evenly spread over the area and worked into the soil. Fertilisation must be carried out in dry conditions, watering follows only after fertilisation.

Hoštické NPK with Guano

Hoštické NPK fertiliser with added guano is a purely natural, organic fertiliser without any industrially manufactured components. As the name suggests, in addition to the three basic components, it also contains guano, which comes from seabird droppings. Hoštické NPK with guano is also designed for universal use throughout the garden. It can be applied in spring or autumn. After working it into the soil, the fertilised earth should be well watered. Application during the season is the same - the prescribed dose of NPK fertiliser is spread around the plants, worked into the soil and thoroughly watered. NPK fertiliser mixed with substrate can also be added to growing boxes. The chemical composition of Hoštické fertiliser with guano is 5%N + 2% P2O5 + 8% K2O.

NPK fertiliser with guano dosage:

Use Recommended dose
basic fertilisation before planting 1.5 - 2.5 kg per 10 m2
greenhouse fertilisation before planting 2 - 3 kg per 10 m2
balcony flower box 80 - 100 g per 50 cm
roses and perennials 1.5 - 2 kg per 10 m2
vegetables and fruit 100 - 150 g per plant
conifers and ornamental shrubs 150 - 200 g per plant
autumn fertilisation 2 kg per 10 m2

Autumn NPK with Guano

Autumn NPK fertiliser with added guano is a purely natural product that meets all the requirements for ecological plant nutrition. Adding NPK fertiliser to the soil does not burden it with any chemical compounds, on the contrary, it enriches it and provides humus, improving the uptake of nutrients contained in the soil. Autumn NPK fertiliser is primarily intended for use in autumn, but can also be used for basic soil fertilisation in early spring. This special type of NPK fertiliser is particularly suitable for fertilising trees and shrubs, and is also useful for autumn planting of seedlings.

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