Fertilizers for Bonsai

Bonsai Fertilizers are nutrients for bonsai trees grown in a small volume of substrate, where nutrient reserves quickly deplete. Here you will find liquid concentrates and foliar mists that support fine leaf structure, even growth, and leaf coloration. Regular, balanced fertilization helps maintain the condition of roots and shoots. The offer includes trusted brands Growth Technology and Mairol. Shipping to the entire European Union.

If you are just starting your bonsai journey or looking for a product for a specific species, explore the full range and compare available fertilizer forms. See all fertilizers and choose the right product for your needs.

How to choose bonsai fertilizer? Form and application

The choice of fertilizer mainly depends on the form of application and the stage of tree cultivation. The two basic groups are liquid concentrates and foliar mists, which are best used complementarily to provide bonsai with complete root and foliar nutrition.

Liquid concentrates are the foundation of bonsai nutrition. They dissolve in water and are used to water the substrate, delivering a full set of macro- and micronutrients to the roots in a controlled dose. Check out Bonsai Focus and Bonsaifreude Mairol — both products create a balanced nutrient solution supporting shoot growth and overall tree condition throughout the growing season.

Foliar mists are a convenient way to quickly supplement micronutrients directly through the leaves when the tree needs immediate support. Ready-to-use mists Bonsai Myst 300ml and Bonsai Myst 750ml are sprayed directly onto leaf blades without the need for prior dilution.

Tip: The small volume of substrate requires regular but lighter fertilization than potted plants — it is better to apply nutrients more often and at lower concentrations. Foliar mist effectively supplements micronutrients between concentrate waterings and reduces the risk of deficiencies.

Concentrates and mists — what you will find in this category

In the bonsai fertilizer category, we have gathered products in two complementary forms. Liquid concentrates form the basis of root nutrition and allow precise dose control, while foliar mists enable quick support of leaf condition and micronutrient supplementation during periods of intense growth.

This set covers the needs of both beginners and experienced growers — from daily care to emergency feeding. The full range of nutrients can be found in the all fertilizers category.

How to use bonsai fertilizer

Dosage — dilute the concentrate in water according to the manufacturer's recommendations, using rather lower concentrations. For bonsai, the rule is: more often but weaker, as the small substrate volume is easily overfertilized.

Frequency — fertilize most intensively during the growing season, from spring to late summer, when the tree produces new shoots and leaves. Regular feeding then gives the best results.

Foliar fertilization — spray the mist evenly on the leaves, preferably in the morning or evening, avoiding full sunlight. This is a quick way to supplement micronutrients.

Caution — do not fertilize dry root balls; the substrate should be slightly moist beforehand. After repotting the tree, wait a few weeks for the roots to regenerate before resuming fertilization.

Frequently Asked Questions

How often should bonsai be fertilized?
During the growing season (spring–summer), usually every 1–2 weeks using lower concentrate concentrations. In winter, when the tree rests, fertilization is reduced or stopped.

Concentrate or mist — which to choose?
Liquid concentrate is the basis of root nutrition, and foliar mist supplements micronutrients. The best results come from alternating the use of both forms.

Can bonsai be fertilized after repotting?
Not immediately. After repotting, wait a few weeks for the roots to regenerate. Fertilizing too early can damage the freshly trimmed root system.

Should bonsai be fertilized in winter?
During winter dormancy, fertilization of deciduous and coniferous trees is reduced or stopped. Tropical species kept warm can be fed lightly year-round.

Do you ship bonsai fertilizers to the entire EU?
Yes, we ship to all countries in the European Union.

4 products

  • Bonsai Focus 300ml - nawóz do roślin bonsai

    Growth Technology Bonsai Focus 300ml - fertilizer for bonsai plants

    Bonsai Focus 300 ml – fertilizer for bonsai plants Bonsai Focus is a concentrated liquid fertilizer specially developed to meet the specific needs of bonsai plants. Growing bonsai involves a limited amount of substrate in shallow pots, which significantly affects the availability of nutrients. The fertilizer formula is designed to effectively compensate for these limitations and provide plants with stable nutrition conditions. Regular use of Bonsai Focus supports healthy growth, maintains proper root system condition, and ensures even development of the above-ground parts. The properly balanced composition helps preserve the intense leaf color and overall vitality of the plants, which is especially important in long-term bonsai care. The fertilizer is enriched with humic acid and fulvic acid, which support soil fertility and improve mineral nutrient uptake by the roots. In conditions of limited soil volume, these additives play a crucial role in maintaining a stable soil environment that promotes even plant development. Bonsai Focus provides key macro- and microelements essential for the proper functioning of bonsai plants. The content of nitrogen, phosphorus, and potassium supports basic growth processes, while calcium and magnesium ensure tissue stability and proper metabolism. Microelements such as iron, manganese, zinc, and copper are present in EDTA-chelated forms, facilitating their absorption even under challenging growing conditions. Benefits of use composition tailored to the specific needs of bonsai plants, compensates for the limited substrate volume in pots, supports healthy root development and even growth, maintains intense leaf coloration, contains humic and fulvic acids that improve soil fertility. Dosage dilute 5 ml of fertilizer in 1 liter of water, apply at least once a week during the growing season. Composition The fertilizer contains essential macroelements: nitrogen, phosphorus, potassium, calcium, and magnesium, as well as microelements – iron, manganese, zinc, and copper in EDTA-chelated forms, supporting the proper growth and condition of bonsai plants. Safety and storage avoid contact with eyes, keep out of reach of children and protect from direct sunlight, store at a temperature of 6–25°C. Capacity: 300 mlEAN code: 5025644912675Manufacturer: Growth Technology

    35,00 zł

  • Bonsai Myst 750ml - nawóz mgiełka do bonsai

    Growth Technology Bonsai Myst 750ml - Bonsai Mist Fertilizer

    Bonsai Myst – fertilizer mist for bonsai Bonsai Myst by Growth Technology is an innovative fertilizer in the form of a gentle mist, specially developed to meet the needs of all bonsai plants. The product allows precise delivery of nutrients both through the leaves and the substrate surface, which is especially important in the cultivation of miniature trees growing in a limited substrate volume. The Bonsai Myst formula is designed to support even growth, maintain a compact shape, and enhance the intense coloration of leaves. The content of essential macronutrients – nitrogen, phosphorus, and potassium – promotes proper plant function, while micronutrients such as iron, manganese, zinc, and copper ensure correct metabolic processes and maintain a healthy leaf appearance. Application as a mist allows simultaneous moistening of leaves and substrate surface, facilitating daily bonsai care. Regular use of the product supports the overall condition of the plants throughout the year, both for bonsai grown indoors and under controlled conditions. Product Benefits balanced fertilization specially developed for bonsai, supports healthy growth, root development, and intense leaf coloration, easy application as a mist on leaves and substrate, can be used regularly throughout the year, efficient packaging suitable for long-term care. How to Use spray leaves and substrate surface 2–3 times a week, for indoor bonsai, use throughout the year, avoid excessive wetting of the plants. Safety and Storage Store the product at a temperature of 6–25°C, away from sunlight. Keep out of reach of children and avoid contact with eyes. To enhance the care effect, the fertilizer can be used together with the Bonsai Focus 300 ml product. Capacity: 750 mlManufacturer: Growth TechnologyEAN Code: 5025644920977

    65,00 zł

  • Bonsaifreude 500ml Mairol - nawóz do bonsai

    Mairol Bonsaifreude 500ml Mairol - fertilizer for bonsai

    Bonsaifreude 500 ml – liquid mineral fertilizer for bonsai trees Bonsaifreude 500 ml by Mairol is a specialized liquid mineral fertilizer designed specifically for the unique needs of bonsai plants. Due to the limited soil volume and regular pruning, these trees require precisely tailored fertilization that supports stable growth, healthy foliage, and good condition throughout the growing season. The fertilizer formula is adapted for long-term and safe care of bonsai grown both indoors and outdoors. Mairol Bonsaifreude provides plants with essential macro- and micronutrients in an easily absorbable form. Regular use of the fertilizer promotes the development of green mass, improves shoot quality, and increases the plants’ resistance to environmental stress. Thanks to its liquid form, nutrients are quickly available to the root system, which is especially important for bonsai grown in shallow containers. Composition and importance of nutrients Nitrogen (N) 3% – in ammonium (1.1%), urea (1.3%), and nitrate (0.6%) forms; supports green mass development and overall plant growth. Phosphorus (P2O5) 7% – stimulates root system development and supports flowering. Potassium (K2O) 5% – improves plant resistance and affects the quality and durability of shoots. Micronutrients – boron (0.02%), copper (0.005%), iron (0.11%), manganese (0.02%), molybdenum (0.001%), and zinc (0.002%) in EDTA-chelated forms, essential for proper metabolic processes. The use of micronutrients in chelated form allows for their rapid and effective uptake, even under conditions of limited nutrient availability in the substrate. Mode of action Thanks to its balanced formula, the fertilizer promotes even plant growth, improves leaf condition, and supports the development of new shoots. Regular fertilization also increases bonsai resistance to diseases and adverse weather conditions. The result is healthier-looking plants and better control of their development over the long term. Dosage and application dilute 2 ml of fertilizer in 1 liter of water, apply once a week from May to October, shake the bottle well before use, wait about 2 weeks after repotting before starting fertilization. Yield One bottle of Bonsaifreude 500 ml allows you to prepare up to 250 liters of fertilizer solution, providing regular and long-lasting fertilization of bonsai throughout the growing season.

    59,00 zł

  • Bonsai Myst 300ml - nawóz mgiełka do bonsai Bonsai Myst 300ml - nawóz mgiełka do bonsai

    Growth Technology Bonsai Myst 300ml - mist fertilizer for bonsai

    Bonsai Myst 300 ml – nourishing mist for bonsai Bonsai Myst by Growth Technology is an innovative fertilizer in mist form, specially developed for the care of all types of bonsai plants. The product allows gentle yet effective delivery of nutrients directly to the leaves and the top layer of the substrate, which is especially important for plants with limited root space. The Bonsai Myst formula is designed to support the health and vitality of miniature trees throughout the year. The content of essential macronutrients such as nitrogen, phosphorus, and potassium supports key growth processes, while micronutrients – iron, manganese, zinc, and copper – are responsible for proper plant metabolism and maintaining the intense, natural coloration of the leaves. Application as a fine mist allows even coverage of the leaves and substrate surface while moisturizing the plant. This form of fertilization works particularly well in the daily care of bonsai, complementing traditional watering and soil fertilization. Regular use of the product promotes harmonious growth and an attractive appearance of the plants. Benefits of use balanced fertilization tailored to the needs of bonsai plants, supports healthy growth and root system development, maintains intense leaf color and good plant condition, easy application in mist form, can be used regularly throughout the year. How to use spray leaves and substrate surface 2–3 times a week, for indoor plants, use throughout the year. Safety and storage avoid contact with eyes, keep out of reach of children, protect from direct sunlight, store at a temperature of 6–25°C. Capacity: 300 mlEAN code: 5025644920960Manufacturer: Growth Technology Bonsai Myst is a practical solution for those who want to care for the condition and aesthetics of their bonsai in a simple and controlled way, adapted to the specifics of this unique form of cultivation.

    35,00 zł

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