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GREEN24

Hydroculture Fertiliser

4.54/5 · 13 reviews

Liquid NPK concentrate for plants grown in hydroculture

Regular price €9,85
Regular price Sale price €9,85
Unit price €39,40/L
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SKU: HYA25N50K50

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5+ units−7 %
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Per fertiliser type; pack sizes can be combined. One twin pack counts as one unit. The discount is applied automatically at checkout.

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At a glance

Hydroculture Fertiliser

Liquid NPK concentrate for plants grown in hydroculture

NPK declaration
6.4 + 4.5 + 6.7

With declared trace nutrients.

Prepared mixture
5 ml per 1.5 l of water

Determine the subsequent container application separately.

Growing method
According to water demand

Account for water level and nutrients already present.

After moving plants
Pause for at least 2 weeks

Feeding pause from the product’s own hydro instructions.

Use the product’s own hydro instructions together with actual plant needs.

Original hydro instructions (German) Opens in a new window.

The instructions here cover the described hydroculture with granules and a water-level indicator. They do not establish a complete recipe for every NFT, DWC or aeroponic system. Water quality, species, nutrient requirements and technical operation need to be matched separately.

Product information

Application & dilutionDistinguish preparation from refilling.

Label preparation: 5 ml concentrate per 1.5 litres of water. This describes preparation of the fertiliser mixture, not a universal concentration for every filled hydro container.

The product’s own hydroculture leaflet describes a container with a water-level indicator: for the first application, add plain water to the middle mark, then fill the remaining space to the maximum mark with the prepared mixture. Actual component volumes depend on the container. Do not fill the entire reservoir indiscriminately with concentrate or full-strength prepared mixture.

When water is needed again, the leaflet divides the refill volume as follows: light feeders, ⅔ water + ⅓ prepared fertiliser mixture; moderate feeders, ½ of each; heavy feeders, ⅓ water + ⅔ prepared fertiliser mixture. Select the category for the particular plant. These fractions refer to the mixture already prepared with 5 ml per 1.5 litres of water, never to the concentrate.

Do not feed during dormancy. After repotting or conversion to hydroculture, the product’s own leaflet specifies at least two weeks without fertiliser. Adjust subsequent care to growth, root condition and nutrients already available.

Mandatory application instructions

Label preparation: 5 ml concentrate per 1.5 litres of water. This describes preparation of the fertiliser mixture, not a universal concentration for every filled hydro container.

When water is needed again, the leaflet divides the refill volume as follows: light feeders, ⅔ water + ⅓ prepared fertiliser mixture; moderate feeders, ½ of each; heavy feeders, ⅓ water + ⅔ prepared fertiliser mixture. Select the category for the particular plant. These fractions refer to the mixture already prepared with 5 ml per 1.5 litres of water, never to the concentrate.

Do not feed during dormancy. After repotting or conversion to hydroculture, the product’s own leaflet specifies at least two weeks without fertiliser. Adjust subsequent care to growth, root condition and nutrients already available.

Original hydro instructions (German) ↗

The general information sheet describes liquid fertilizer concentrates. Ready-to-use and solid fertilizers have their own application instructions on the product label.

View the complete original hydro instructions Opens in a new window.

PropertiesProduct characteristics and guidance

The instructions here cover the described hydroculture with granules and a water-level indicator. They do not establish a complete recipe for every NFT, DWC or aeroponic system. Water quality, species, nutrient requirements and technical operation need to be matched separately.

  • Net mass:290 g per 250 ml;1161 g perlitre according to the respective rear labels.
Nutrient compositionNPK 6.4+4.5+6.7

Product pH: 6.9. This describes the concentrate. Calcium and magnesium contents are not specified in this declaration; no complete recipe for arbitrary source water is inferred.

  • 6.4% total nitrogen (N), including 6.0% urea nitrogen. The rear declaration does not specify the remaining nitrogen form.
  • 4.5% water-soluble phosphate (P₂O₅).
  • 6.7% water-soluble potassium oxide (K₂O).
  • 0.0075% boron (B).
  • 0.003% water-soluble copper (Cu), as EDTA chelate.
  • 0.0150% iron (Fe), as EDTA chelate.
  • 0.0090% manganese (Mn), as EDTA chelate.
  • 0.0008% molybdenum (Mo).
  • 0.003% water-soluble zinc (Zn), as EDTA chelate.

250 ml – rear label Opens in a new window.

1 litre – rear label Opens in a new window.

Mixing with other productsMixing, combining or applying separately

Using products as part of the same care routine is different from mixing them in one container. Follow the labels and application instructions of all products involved.

  • Tank mixing: Combine products in a watering can or spray tank only when the manufacturer instructions confirm the specific combination and use. Do not mix undiluted concentrates together.
  • Separate application: Applying products separately or at different times does not automatically establish compatibility. Check the species, location, plant condition and instructions for both products. No universal waiting period follows from this.
  • Complementary products: A recommendation for suitable growing media, accessories or another care product does not mean that it may be mixed with the fertiliser.
  • Plant protection products: The crop, target organism, application method and pack instructions must also be suitable. The fertiliser calculator does not calculate plant protection product quantities or confirm compatibility.

The recommendations cover products for different care tasks. Combining them in the same solution requires the instructions for both products to allow that combination. Otherwise, apply the products separately.

Go to plant protection advice →

Pairs well with

Selected additions for your plant care.

PRODUCT KNOWLEDGE

Hydroculture Fertiliser

Overview

Original close-up of GREEN24 crushed expanded clay 4–8 mm.

Support roots and manage water

The photograph shows the product’s own crushed expanded clay. It is a possible companion for a suitable granular growing system. Water level and nutrients are managed separately from the bulk volume of material.

Details & background

Granules support the roots while water and nutrients are added deliberately. First dilute this hydroculture fertiliser with water. The amount of prepared mixture added to the container then depends on the plant, water already present and the product’s own hydroculture instructions.

The instructions here cover the described hydroculture with granules and a water-level indicator. They do not establish a complete recipe for every NFT, DWC or aeroponic system. Water quality, species, nutrient requirements and technical operation need to be matched separately.

Application

General measuring photograph for liquid concentrate.

Prepare the mixture first

Label preparation: 5 ml concentrate per 1.5 litres of water. This describes preparation of the fertiliser mixture, not a universal concentration for every filled hydro container.

  1. Prepare equipment and instructions

    Prepare equipment and instructions

    Use clean measuring equipment and check the container’s water-level indicator. Account for residual nutrients or other residues; do not mix different concentrates without confirming compatibility.

  2. Calculate the prepared mixture

    Calculate the prepared mixture

    The product label specifies 5 ml per 1.5 litres of water. For example, measure 10 ml for 3 litres of water. This is the prepared mixture; the subsequent container dose is determined separately.

  3. Add water first

    Add water first

    Put part of the intended water volume into a clean container. The label prefers low-lime water or rainwater at 15–25 °C. Water quality must also suit the crop.

  4. Shake and measure

    Shake and measure

    Shake the bottle well and measure the required concentrate accurately. The checked front labels define one cap as 5 ml. Never put concentrate directly onto roots or leaves.

  5. Mix and identify

    Mix and identify

    Add concentrate to the water, mix, and add the remainder of the intended water volume. Clearly identify the prepared mixture and use it promptly.

  6. Apply for the particular container

    Apply for the particular container

    Distinguish the first application from later refills using the hydroculture instructions. Its fractions refer to this prepared mixture, not concentrate. Account for plant demand, fill level and the feeding pause after moving plants.

Refill according to demand

For later water refills, the proportion of prepared mixture varies with plant demand. The complete proportions appear under “Application & prepared mixture” in the product information. Check water level and growing conditions before each new application.

Nutrition & properties

Original 250 ml GREEN24 hydroculture fertiliser bottle.

Use this product’s own label

The instructions here cover the described hydroculture with granules and a water-level indicator. They do not establish a complete recipe for every NFT, DWC or aeroponic system. Water quality, species, nutrient requirements and technical operation need to be matched separately.

Details & background

Feed through the hydro container

The product’s own hydroculture leaflet describes a container with a water-level indicator: for the first application, add plain water to the middle mark, then fill the remaining space to the maximum mark with the prepared mixture. Actual component volumes depend on the container. Do not fill the entire reservoir indiscriminately with concentrate or full-strength prepared mixture.

Choose foliar feeding selectively

The label permits spraying foliage. First check species, leaf surfaces and conditions; avoid open flowers. This is not a second full nutrient supply in addition to existing root feeds.

Care problems

Yellow leaves, soft roots or weak growth have several possible causes. Check water level, roots, light and previous nutrition before adding more fertiliser. This product is not a treatment for plant disease.

Plant protection advice

The plant species, photographs and details of location, moisture and previous care help assess plant damage. Identify the cause and a suitable application before treatment.

More fertiliser is not a general solution to growing problems. A recommendation to buy products together does not confirm that they can be mixed.

Plant protection products and application

General manufacturer information: these products have not been selected here as suitable treatments for the plant shown here. Before use, check the plant species, pest, application site and current instructions.

This overview does not confirm suitability for this plant or approval to mix products.

Schädlings-Frei-Organic
Schädlings-Frei-Organic

€16,95

For spraying or watering, depending on the authorised use. The method depends on the plant, pest and location.

View product in our shop →
Trauermückenfrei Organic
Trauermückenfrei Organic

€9,99

Watering treatment for fungus gnat larvae; further uses include spraying. The particular application and plant must match the instructions.

View product in our shop →
Kiron® Milben-Ex
Kiron® Milben-Ex

€12,95

Spray treatment for the mites and other pests specified in the instructions. Check the plant and location before use.

View product in our shop →

Use plant protection products safely. Always read the label and product information before use.

Plant care

Understand the growing method

Hydroculture describes how a plant is grown. It does not replace the botanical species or its needs. Granules in a closed container and technically aerated or circulating systems are not the same application.

Choose light and position

Even without soil, the plant determines light and temperature needs. Position the container securely and avoid unnecessary heating of the roots. Extra fertiliser cannot compensate for insufficient light or an unsuitable position.

Check water level and roots

Observe the water-level indicator and actual demand. Do not refill solely by the calendar or keep the entire root system permanently submerged. Existing water and nutrients count towards every further application.

Distinguish repotting from conversion

A plant already grown in hydroculture needs gentle root handling and a suitable new container volume when moved. Converting a soil-grown plant is a separate intervention. Check species and root condition; then follow the leaflet’s minimum two-week feeding pause.

Care for leaves and shoots

Remove dead plant material and clean leaf surfaces gently when necessary. Pruning and pinching depend on species and growth habit; there is no single pruning rule for every hydroculture plant.

Account for growth and dormancy

A warm, lit crop may develop differently from a cool houseplant in winter. Actual growth and species-specific dormancy determine nutrition. The source does not establish one unambiguous refill schedule for every container.

Nutrients, deficiency and excess

Frequently asked questions

How do I prepare the basic mixture?

Use 5 ml per 1.5 litres of water, or 10 ml for 3 litres of water. This calculation applies only to the prepared mixture. Adding it to the hydro container then follows the product’s own hydroculture instructions and plant needs.

How is the refill diluted?

When water is needed again, the leaflet divides the refill volume as follows: light feeders, ⅔ water + ⅓ prepared fertiliser mixture; moderate feeders, ½ of each; heavy feeders, ⅓ water + ⅔ prepared fertiliser mixture. Select the category for the particular plant. These fractions refer to the mixture already prepared with 5 ml per 1.5 litres of water, never to the concentrate.

Is this a universal solution for all hydro systems?

The instructions here cover the described hydroculture with granules and a water-level indicator. They do not establish a complete recipe for every NFT, DWC or aeroponic system. Water quality, species, nutrient requirements and technical operation need to be matched separately.

Is there a matching one-litre bottle?

Yes. The 1 litre bottle carries the same nutrient declaration and prepared-mixture rate as the 250 ml size. The twin pack contains two individually closed 250 ml bottles. Choose the size for your actual needs.

Can I feed immediately after conversion?

Do not feed during dormancy. After repotting or conversion to hydroculture, the product’s own leaflet specifies at least two weeks without fertiliser. Adjust subsequent care to growth, root condition and nutrients already available.

Is the product pH the same as the water pH?

No. The declared pH of 6.9 describes the concentrate. It guarantees neither the pH in the hydro container nor one shared EC target. Leaf and root care still depend on species and conditions.

Safety and storage

Safety instructions

SDS – Safety data sheet available on request.

Do not feed during dormancy. After repotting or conversion to hydroculture, the product’s own leaflet specifies at least two weeks without fertiliser. Adjust subsequent care to growth, root condition and nutrients already available.

  • Shake before use. Never apply undiluted.
  • Prefer low-lime water or rainwater at 15–25 °C; check water quality for the crop.
  • Do not apply in sun, below 5 °C or above 30 °C.
  • Feed only pre-moistened roots; avoid open flowers when spraying.
  • Keep away from children and animals. Official advisory recommendations take precedence.

Storage

Dry and dark, above 8 °C to no more than 38 °C

Store in a dry, dark place above 8 °C and no higher than 38 °C. Keep out of reach of children and animals.

Manufacturer / company placing the product on the market

GREEN24 GmbH
Am Neggenborn 125
44892 Bochum, Germany
info@green24.de
www.green24.de

  • 5 stars: 8 (62%)
  • 4 stars: 4 (31%)
  • 3 stars: 1 (8%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
J
Jens G.

Ok aber ich war überrascht wie wenig es war. Macht was es soll und die Pflanzen sind glücklich.
Versand was schnell und die verladen ordentlich zum Öffnen

E
Ein K.

Habe vor einiger Zeit meine Hydrokultur auf diesen Flüssigdünger umgestellt. Kann bis jetzt keinen Unterschied zum Granulat feststellen, aber ich finde dazu ist der Zeitraum zu kurz um eine verlässliche Meldung abzugeben.

C
Chris Z.

Ich verwende den Dünger seit ein paar Wochen, um meinen Ficus Benjamini wieder aufzupäppeln, der seit einiger Zeit viele Blätter verlor. Mit dem Dünger könnte eine Trendwende geschafft sein, die Pflanze zeigt weniger Blattverluste und grünere Blätter.

P
Pencil V.

der Dünger ist wirklich hervorragend! Die Grünlinge explodieren regelrecht u sehen satt grün aus! ist bei mir im Dauerwarenkorb! supi!

E
Ein K.

Wollte diesen Hydrokultur- Dünger verwenden um eine Nährstofflösung herzustellen für hydrosystem in denen ich unter anderem Salat, Chillis und Basilikum züchten will. (Kein eigener Garten). Für diesen Zweck eignet sich der Dünger wohl nicht. Für die Büro- mäßigen Töpfe mit Dekopflanzen und Seramis darin, sollte er jedoch funktionieren.

Trotzdem 3 Sterne, denn als ich Ihn nicht verwenden konnte, begonn ich damit etwas höher verdünnt als empfohlen meinen Topfpflanzen beizugießen. Diese scheinen das Zeug zu mögen.

J
Jochen S.

dieser Dünger hat wirklich den grünen Daumen verdient (auch die anderen Sorten). Offensichtlich ist die Zusammensetzung sehr gut auf den Bedarf der Pflanze abgestimmt, denn meine Pflanzen gedeihen prächtig. Bei manchen Sorten wäre eine größere Flasche wünschenswert!

k
kant

I use it in my trygen herbie! all plants are growing very well with this and i can recommend it!

M
Matthias H.

Wir haben mehrere Hydrokulturen in unserer Wohnung, u. a. auch 2 knapp 20 Jahre alte, 2,50 Meter hohe Ficus Benjamini.
Diese wurden in den letzten Jahren immer "blasser" und so kam ich auf die Idee, es mal mit diesem Dünger zu versuchen.
Seit einigen Monaten verwende ich ihn in jedem Gießwasser und, ohne Zweifel, die nachwachsenden Blätter sind kräftiger und dunkelgrüner geworden.
Auch 2 andere, kleinere Ficus Benjamini, zeigen genau den gleichen Effekt - das kann kein Zufall sein.

Fazit:
Wir sind von der Qualität dieses Düngers absolut überzeugt, werden ihn auf jeden Fall wieder kaufen und können ihn mit bestem Gewissen empfehlen!

E
E. K.

diesen Dünger habe ich nun schon länger im Einsatz, um einen großen Hydrokultur-Ficus zu düngen. Es bekommt ihm sehr gut, und er will jetzt noch größer und noch dichter werden.

H
Heide

Ich dünge damit meine Hydrokulturpflanzen und denke dass der Dünger meinen Pflanzen gut tut. Es wird wohl noch etwas dauern bis ich einen richtigen Erfolg sehe, weil ich gerade vor kurzem erst einige Pflanzen von Erde auf Hydrokultur umgestellt habe. Ich würde ihn wieder kaufen.

D
Dirk D.

Für diesen Preis ist dieses Dünger- Konzentrat sehr gut, man gibt eine Kappe auf 1,5 Liter Wasser. Die Pflanzen wachsen merklich besser in der Wachstumsphase und sie haben ein kräftiges Grün.

U
Ursula W.

Den Dünger habe ich gewählt, weil ich kein Granulat wollte sondern einen Flüssigdünger. Ich habe bis jetzt einmal alle meine Hydrokulturpflanzen ausgewaschen , mit neuem Wasser und Dünger versehen. Sie gedeihen viel besser, bekommen viele neue Blätter und schauen viel kräftiger aus.

R
Regina S.

Meinen Pflanzen tut das Zeug richtig gut!
Selbst leicht gelb gewordene Blätter werden wieder satt grün. Ich benutze es regelmäßig einmal im Monat.