fertilizer

91 products

  • Pictured is a purple-white bag with the inscription “Plagron Perlite – Aeration for plant substrates”. The 60-liter bag from Bertels B.V. describes its contents as an additive and substrate supplement to improve soil structure.
    Up to 20% off
    Vendor:
    Bertels B.V.

    Plagron Perlite - ventilation for plant substrates

    3 total reviews

    Regular price From ¥1,092 JPY
    Sale price From ¥1,092 JPY Regular price ¥1,127 JPY
  • The Plagron Growmix with Perlite bag from Bertels B.V. is presented in a unique purple-pink design with striking white text. It consists of 100% Terra, enriched with worm humus for better air permeability, and the brand logo is prominently visible at the top.
    Up to 10% off
    Vendor:
    Bertels B.V.

    Plagron Growmix with Perlite

    3 total reviews

    Regular price From ¥1,886 JPY
    Sale price From ¥1,886 JPY Regular price ¥2,095 JPY
  • A bag of Plagron Lightmix with perlite substrate from Bertels B.V. in purple and pink contains 100% Terra-fertilized soil with white text. The upright bag displays product information and perlite details at the bottom, highlighting the Plagron quality soil.
    Vendor:
    Bertels B.V.

    Plagron Lightmix with Perlite

    1 total reviews

    Regular price From ¥1,938 JPY
    Sale price From ¥1,938 JPY Regular price ¥1,938 JPY
  • Two containers of Plagron Terra Bloom from Bertels B.V. stand against a white background. The larger dark purple container features a pink-white label that mirrors the design of the smaller one and is ideal for promoting vigorous flowering in your garden.
    Up to 18% off
    Vendor:
    Bertels B.V.

    Plagron Terra Bloom

    1 total reviews

    Regular price From ¥1,325 JPY
    Sale price From ¥1,325 JPY Regular price ¥1,616 JPY
  • Pictured are two Plagron Sugar Royal - Premium Bloom Enhancer containers from Bertels B.V.: a larger square one and a smaller cylindrical one, both with bright purple labels, white text, and a green logo that guarantees quality enriched with essential amino acids.
    Up to 9% off
    Vendor:
    Bertels B.V.

    Plagron Sugar Royal - Premium flower amplifier

    4 total reviews

    Regular price From ¥2,083 JPY
    Sale price From ¥2,083 JPY Regular price ¥2,147 JPY
  • A plastic bottle labeled „Plagron pH Min“ by the brand Bertels B.V. in purple-white design acts as a pH regulator. It ensures the balance of the nutrient solution and features a screw cap with a detailed, small-print user manual for precision.
    Up to 1% off
    Vendor:
    Bertels B.V.

    Plagron pH min

    2 total reviews

    Regular price From ¥1,081 JPY
    Sale price From ¥1,081 JPY Regular price ¥1,081 JPY
  • Four bottles of Plagron Alga Bloom Natural Plant Fertilizer by Bertels B.V., ideal for the flowering phase, are presented in two large and two small bottles. Each bottle features a bright purple design and green "100% Bio" labels, stylishly presenting these essential plant nutrients.
    Up to 35% off
    Vendor:
    Bertels B.V.

    Plagron Alga Bloom of natural plant fertilizers

    Regular price From ¥466 JPY
    Sale price From ¥466 JPY Regular price ¥716 JPY
  • Two containers of Plagron Terra Grow mineral-based fertilizer from Bertels B.V. are set against a white background. The larger purple container and the similar smaller bottle have pink and white labels promoting an improved formula for faster plant growth during the growth phase.
    Up to 13% off
    Vendor:
    Bertels B.V.

    Plagron Terra Grow

    1 total reviews

    Regular price From ¥442 JPY
    Sale price From ¥442 JPY Regular price ¥442 JPY
    Unit price ¥4,420  per  l
  • Five Plagron Green Sensation bottles from Bertels B.V. in various sizes enhance plant quality. The purple bottles with white caps and green-white labels improve harvest quality, with the largest one at the back.
    Up to 21% off
    Vendor:
    Bertels B.V.

    Plagron Green Sensation

    1 total reviews

    Regular price From ¥2,605 JPY
    Sale price From ¥2,605 JPY Regular price ¥3,299 JPY
  • Image of two Plagron Power Roots containers from Bertels B.V.: a large square and a smaller bottle, both purple. The labels emphasize "faster root development" with a "new formula" featuring humic acids in bright yellow and purple.
    Up to 35% off
    Vendor:
    Bertels B.V.

    Plagron Power Roots

    1 total reviews

    Regular price From ¥1,612 JPY
    Sale price From ¥1,612 JPY Regular price ¥1,688 JPY
  • Pictured are two containers of Bertels B.V. Plagron PK 13-14 – for firmer and harder fruits, both in dark purple with white and purple labels featuring the brand, product name, and usage information.
    Up to 35% off
    Vendor:
    Bertels B.V.

    Plagron PK 13-14 - for firmer and harder fruits

    Regular price From ¥842 JPY
    Sale price From ¥842 JPY Regular price ¥863 JPY
  • Four containers of Plagron Alga Grow Natural Growth Fertilizer by Bertels B.V. include two large purple jugs and two smaller bottles. Green and white labels show "100% Organic" and emphasize its role as an essential base nutrient for your garden.
    Up to 35% off
    Vendor:
    Bertels B.V.

    Plagron Alga Grow natural growth fertilizer

    1 total reviews

    Regular price From ¥716 JPY
    Sale price From ¥716 JPY Regular price ¥716 JPY
  • Two plastic containers with Plagron Bat Guano from Bertels B.V. are displayed, with the larger one standing behind the smaller one. Both have purple lids and labels with product information and trademarks.
    Up to 1% off
    Vendor:
    Bertels B.V.

    Plagron asked Guano

    Regular price From ¥2,661 JPY
    Sale price From ¥2,661 JPY Regular price ¥2,687 JPY
  • Against a white background, there are two purple bottles of Plagron pH Plus from Bertels B.V. with white caps and the labels "Universal" and "pH Control". They are intended to increase the pH value and optimize nutrient uptake.
    Up to 2% off
    Vendor:
    Bertels B.V.

    Plagron PH Plus

    1 total reviews

    Regular price From ¥833 JPY
    Sale price From ¥833 JPY Regular price ¥833 JPY
  • Two products from Bertels B.V., "Plagron Mega Worm", act as natural soil improvers in large white and purple bags and smaller purple containers that bear the brand's logo. They are additive substrate supplements rich in trace elements and enzymes.
    Up to 12% off
    Vendor:
    Bertels B.V.

    Plagron Mega Worm - natural soil improvement

    1 total reviews

    Regular price From ¥2,689 JPY
    Sale price From ¥2,689 JPY Regular price ¥2,689 JPY

Fertilizer - for healthy growth and strong plants

A nutrient-rich soil is the foundation for vigorous growth, vibrant blooms, and a bountiful harvest. Fertilizer provides plants with exactly the nutrients they need for healthy development - from seedlings to full maturity. Whether in the garden, on the balcony, or in professional cultivation: The right fertilizer ensures optimal conditions and sustainably strengthens plants from within.

High-quality fertilizers not only improve nutrient supply but also soil structure. They promote root formation, increase resistance to diseases, and help maintain a balanced soil life in the long term.

 

This is what distinguishes high-quality fertilizer

A good fertilizer convinces with a balanced composition and easy application. Depending on the type of plant and season, plants require different nutrients - nitrogen, phosphorus, potassium, and trace elements are the most important building blocks.

In addition to classic mineral variants, organic and biological fertilizers are gaining importance. They act gently, promote soil life, and contribute to sustainable gardening.


Advantages of modern fertilizers at a glance:
  • Promote vigorous plant growth and root formation
  • Strengthen resistance to pests and diseases
  • Improve soil structure and nutrient absorption
  • Environmentally friendly and effective in the long term
  • Suitable for gardens, houseplants, and professional cultures

An example of natural plant nutrition is the liquid Neudorff Azet Universal Fertilizer, which contains all important nutrients and is suitable for almost all plants. The Neudorff Azet Citrus & Mediterranean Fertilizer ensures healthy leaves and aromatic fruits in Mediterranean plants with organic components. For sustainable soil revitalization, the Neudorff Sandy Soil Improver is recommended, which loosens the structure and improves water retention - ideal for sandy soils.


Application and practical tips for optimal fertilization

The correct application of fertilizer is crucial for success. Too much can harm plants just as much as too little. Therefore, the recommended dosage and the individual needs of the plants should always be considered.

Tip:

  • Spring: Initial fertilization for vigorous growth and new shoots
  • Summer: Subsequent fertilization to support flowering and fruit formation
  • Autumn: Potassium-rich fertilization strengthens plants for winter
  • Year-round: Liquid fertilizers or organic alternatives for potted and indoor plants

When applying, it is important to distribute fertilizer evenly in the root area and then water well. Liquid fertilizers can be conveniently administered through the irrigation water, while granules and pellets are ideal for beds or lawns.

Organic fertilizers work more slowly but more sustainably, as they enrich the soil with humus and promote natural soil life. This creates a healthy balance that ensures strong and resilient plants in the long term.


Sustainability Meets Effectiveness – Your Partner for High-Quality Fertilizers

Fertilizer is much more than a nutrient source – it is a key to sustainable plant care and healthy garden culture. With the right products, the balance between powerful supply and environmentally conscious action is achieved.

In addition to fertilizers, you will find many other product areas at Altruan that perfectly complement your gardening and care work:

Altruan stands for quality, sustainability, and expertise. With high-quality fertilizers and complementary accessories, you create ideal conditions for strong plants, blooming gardens, and healthy harvests – year after year.

Why is fertilizer important for plants?

Fertilizer provides plants with essential nutrients such as nitrogen, phosphorus and potassium. These promote growth, flowering and fruit formation and prevent deficiency symptoms that can lead to weak or diseased plants.

What types of fertilizer are there?

There are mineral, organic and biological fertilizers. Mineral ones work quickly, organic ones promote long-term soil health. Biological fertilizers combine both advantages and are particularly environmentally friendly.

How often should you fertilize?

This depends on the type of plant and the season. In spring and summer, regular fertilization is usually carried out every two to four weeks. Houseplants can be supplied with liquid fertilizer at longer intervals all year round.

Are organic fertilizers better for the environment?

Yes, organic fertilizers are made from natural raw materials and sustainably promote soil life. They improve humus formation and reduce the risk of over-fertilization - ideal for ecologically conscious gardeners.