fertilizer

38 products

  • The photo shows three containers of Plagron Pure Zym by Bertels B.V., a natural soil conditioner containing enzymes. In the background is a large purple canister, with a medium-sized and a small bottle in front of it. Each bottle has a purple label with white text.
    Vendor:
    Bertels B.V.

    Plagron Pure Zym

    1 total reviews

    Regular price From ¥989 JPY
    Sale price From ¥989 JPY Regular price ¥989 JPY
  • Against a white background are two purple bottles of Plagron pH Plus by Bertels B.V., with white caps and the labels “Universal” and “pH Control.” They are designed to raise the pH level and optimize nutrient uptake.
    Up to 35% off
    Vendor:
    Bertels B.V.

    Plagron PH Plus

    1 total reviews

    Regular price From ¥785 JPY
    Sale price From ¥785 JPY Regular price ¥787 JPY
  • Two bags of Plagron Batmix from Bertels B.V., in green and purple packaging, feature the Batmix logo, are labeled as 100% natural, are enriched with peat to promote plant growth, and are available in various sizes with detailed information on the packaging.
    Up to 2% off
    Vendor:
    Bertels B.V.

    Plagron Batmix

    Regular price From ¥2,540 JPY
    Sale price From ¥2,540 JPY Regular price ¥2,566 JPY
  • Two plastic containers filled with Plagron Bat Guano by Bertels B.V. are on display, with the larger one behind the smaller one. Both have purple lids and labels with product information and the trademark.
    Up to 5% off
    Vendor:
    Bertels B.V.

    Plagron asked Guano

    Regular price From ¥2,228 JPY
    Sale price From ¥2,228 JPY Regular price ¥2,347 JPY
  • The picture shows a 10-ml bottle of Plagron Seedbooster Plus by Bertels B.V. next to its purple-and-white packaging. This essential additive promotes rapid germination of young plants. Instructions in 12 languages are included with the package.
    Up to 7% off
    Vendor:
    Bertels B.V.

    Plagron Seedbooster Plus 10ml - Fast germination | Pack (10 ml)

    Regular price ¥2,508 JPY
    Sale price ¥2,508 JPY Regular price ¥2,696 JPY
  • Two Plagron Silic Rock containers from Bertels B.V. are shown: a large dark purple container on the left and a smaller bottle on the right, both labeled “Silicon Fertilizer.” Their purple labels with white text highlight their role in improving plant resilience and nutrient uptake.
    Vendor:
    Bertels B.V.

    Plagron Silic Rock - improves the absorption of nutrients

    Regular price From ¥1,043 JPY
    Sale price From ¥1,043 JPY Regular price ¥1,043 JPY
  • Two products from Bertels B.V., “Plagron Mega Worm,” serve as natural soil conditioners and come in large white and purple bags and smaller purple containers bearing the brand’s logo. They are additive substrate supplements rich in trace elements and enzymes.
    Vendor:
    Bertels B.V.

    Plagron Mega Worm - natural soil improvement

    1 total reviews

    Only 7 left
    Regular price From ¥2,515 JPY
    Sale price From ¥2,515 JPY Regular price ¥2,515 JPY
  • A bag of Plagron Europebbles from Bertels B.V. features a blue-and-white design with a purple top and the labels “100% Hydro” and “Substrate, unfertilized.” It contains pure, salt-free clay pellets that are ideal for hydroponic systems and plant cultivation.
    Up to 35% off
    Vendor:
    Bertels B.V.

    Plagron Europebbles - clay balls made of pure, salt -free tone

    Regular price From ¥1,021 JPY
    Sale price From ¥1,021 JPY Regular price ¥1,572 JPY
  • A product image of a 50L bag of Plagron Cocos Premium from Bertels B.V. shows primarily white packaging with purple and orange sections. It highlights that the bag is unfertilized, is ideal for hydroponic cultivation, and includes various symbols and product details.
    Up to 3% off
    Vendor:
    Bertels B.V.

    Plagron Cocos Premium 50l - High quality coconut substrate | Sack (50 l)

    Regular price ¥4,049 JPY
    Sale price ¥4,049 JPY Regular price ¥4,174 JPY
  • The Plagron Top Grow Box 100% Natural by Bertels B.V. features a green-and-purple design, includes five bottles—including “Alga Bloom”—uses natural ingredients, supports growth on an area of over 1 m², and offers excellent organic fertilizers for a complete nutrient supply.
    Up to 19% off
    Vendor:
    Bertels B.V.

    Plagron Top Grow Box 100% Natural - Complete Grow Set | 1 piece

    Regular price ¥6,247 JPY
    Sale price ¥6,247 JPY Regular price ¥7,714 JPY
  • A box labeled “Plagron Seedbox – Compact Planting Kit for Seedlings | 1 piece” by Bertels B.V. contains a tray with compartments, a bottle of Seedbooster, and instructions in English, Dutch, and French on the packaging.
    Vendor:
    Bertels B.V.

    Plagron Seedbox - compact planting set for seedlings | 1 piece

    Only 12 left
    Regular price ¥3,598 JPY
    Sale price ¥3,598 JPY Regular price ¥3,598 JPY
  • Five bottles of Plagron Green Sensation from Bertels B.V., in various sizes, improve plant quality. The purple bottles with white caps and green-and-white labels enhance crop quality; the largest one is shown in the back.
    Vendor:
    Bertels B.V.

    Plagron Hydro Roots

    1 total reviews

    Regular price From ¥843 JPY
    Sale price From ¥843 JPY Regular price ¥843 JPY
  • The Plagron Easy Pack Natural from Bertels B.V. contains three bottles with green and purple labels for “Alga Grow” and “Alga Bloom,” as well as a small measuring cup. It uses an organic base fertilizer, ensuring precise plant nutrition in a compact package.
    Vendor:
    Bertels B.V.

    Plagron Easy Pack Natural - Compact plant food | 1 piece

    Regular price ¥3,176 JPY
    Sale price ¥3,176 JPY Regular price ¥3,176 JPY
  • The “Plagron Top Grow Box 100% Terra - Growing Kit for Soil | 1 piece” by Bertels B.V. includes bottles such as “Terra Bloom” and “Terra Grow.” The box is designed in purple and pink and features text describing its features and contents.
    Vendor:
    Bertels B.V.

    Plagron Top Grow Box 100% Terra - Added for Earth | 1 piece

    Regular price ¥6,800 JPY
    Sale price ¥6,800 JPY Regular price ¥6,800 JPY
  • The image shows a white 50-liter bag of Plagron Growmix—without perlite—from Bertels B.V., featuring purple and pink accents and the label “Premium potting soil, pre-fertilized for 100% Terra fertilization to ensure healthy plant growth.”
    Vendor:
    Bertels B.V.

    Plagron Growmix 50L - without Perlite | Bag (50 l)

    Regular price ¥4,345 JPY
    Sale price ¥4,345 JPY Regular price ¥4,345 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.