Water-soluble & available
Mix with the stated water volume and apply evenly. Never use undiluted.
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- Dilution: 5 ml per 1 l of water.
- Dilute before use · follow the label
A small collection, a world of variety.
Many desert cacti grow with bright light and dry periods. Forest cacti follow a different rhythm. Identify the species first, then coordinate light, medium and watering.
- Declared NPK
- 2.5 + 4.0 + 6.0With declared trace nutrients.
- Dilution
- 5 ml per 1 l of waterEvery 2–4 weeks during growth.
- Application
- Roots & foliageDilute before use.
- Regular application period
- March–September or the species’ active growing seasonFollow the plant’s active growth.
Product information
Application & dosageDose according to actual water volume.
Application in one place
Measure. Mix. Apply.
Dosage calculator for cacti
Enter the water volume you need. The calculator uses this product's stated dilution.
Your water amountRough watering-volume guide
1 l
Matching concentrate amount
5 ml
Measure concentrate using a suitable aid and dilute fully with water.
Enter a water amount from 0.1 to 1,000 litres.
Water needs depend on pot size, compost moisture, roots and conditions. The calculator determines dilution from your water volume.
How the guide is calculated
Concentrate amount = water volume × product dilution. The calculator does not measure water demand.
Prepare a clean container
Use a clean watering can or sprayer; preferably low-lime water or rainwater at 15–25 °C.
Calculate the amount
Enter the water volume and read the calculated concentrate amount.
Add some water first
Start by filling the container with part of the chosen water volume.
Shake & measure
Shake well. Measure the calculated amount using a suitable measuring aid.
Add the concentrate
Add the calculated amount of concentrate to the water.
Top up & mix well
Top up to the chosen water volume and mix well. Watering or spraying: see below.
When to feed? 5 ml per 1 l of water. Every 2–4 weeks during the growing season. Regular application period: March–September or the species’ active growing season.
Watering · through the roots
Moisten the root ball first, then distribute the mixture across the root zone. Let excess water drain through the pot; do not leave nutrient solution standing in a cachepot.
Spray application · check suitability
The label permits spraying. On cacti the solution mainly reaches the green stem; consider species and surface. Apply only diluted, out of sun, not below 5°C or above 30°C; avoid open flowers. Do not add watering and spraying as separate feeds.
Characteristics & pack sizesThe concentrate at a glance.
Net mass: 281 g for 250 ml.
The twin pack contains two bottles of 250 ml each.
| Pack size | Price | Yield at label dilution |
|---|---|---|
| 250 ml | 9.85 € Unit price ( 39.40 €/ l) | 50.0 l |
| 500 ml – twin pack (2 × 250 ml) | 18.95 € Unit price ( 37.90 €/ l) | 100.0 l |
Yield is calculated from the recommended standard dilution.
Does this fertiliser suit your plant?
Identify your plant
For cacti; follow this concentrate's directions.
Follow active growth
The plant is actively growing; moisten the root ball before application.
Check root space
Account for nutrients in fresh compost. Check the cause of care problems first.
Beyond NPK · understand the formulation
Well mixed – available to green stems and roots
Declared main and trace nutrients are applied in diluted form. Refer to the full nutrient declaration for proportions.
Protected trace nutrients
The declaration lists copper, iron, manganese and zinc as EDTA chelates. Individual proportions are listed below.
Fewer hard-water effects
Preferably use low-lime water or rainwater at 15–25 °C. Product pH describes the concentrate, not the prepared solution or compost.
Target nutrition during growth
Dilute according to the label and apply during growth. Check root damage and unsuitable growing conditions first.
Understand plant development
Consider nutrients, light, water and growth stage together. Extra concentrate does not replace suitable growing conditions.
Follow this product's water quality and application directions. These do not establish a general water-treatment programme.
Suitable for compatible fertiliser dosing equipment. Set equipment to this product’s dilution and follow the device instructions.
Products
Use complementary products according to their own directions. This profile does not approve an additional mixture.
Recommendations do not approve mixing. Combine products only when both directions allow that exact mixture. Never mix undiluted concentrates.
Nutrient composition · NPKDeclared nutrients and their forms.
Declared nutrient percentages. Product pH: 6.8.
The product pH describes the concentrate, not a guaranteed pH for the soil or diluted feed solution.
- 2.50% total nitrogen (N)
- 2.00% urea nitrogen
- 4.00% water-soluble phosphate (P₂O₅)
- 6.00% water-soluble potassium oxide (K₂O)
- 0.005% boron (B)
- 0.002% copper (Cu) · EDTA chelate
- 0.010% iron (Fe) · EDTA chelate
- 0.006% manganese (Mn) · EDTA chelate
- 0.0005% molybdenum (Mo)
- 0.002% zinc (Zn) · EDTA chelate
GREEN24 · Plant knowledge
The right care for your plant.
Many desert cacti grow with bright light and dry periods. Forest cacti follow a different rhythm. Identify the species first, then coordinate light, medium and watering.
A small collection, a world of variety.
Many desert cacti grow with bright light and dry periods. Forest cacti follow a different rhythm. Identify the species first, then coordinate light, medium and watering.
Root condition guides watering
Preserve healthy roots. Do not immediately soak freshly damaged roots; consider species and temperature.
Respect spines and growth form
Globes, columns and segments need different support. A group name does not replace species-specific care.
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Growth & nutrient uptake
Leaves use light; roots take up water and mineral nutrients. The diagrams show how plant organs work together and how nutrients are absorbed.
Cacti: roots, stems and areoles
Roots · absorb & anchorExplore the limited root space inside the pot.
Fine roots need contact with moist compost as well as oxygen. An open structure and drainage help provide both. Feed the pre-moistened root ball with diluted solution, never with concentrate applied directly to roots.
Green stem · photosynthesis and storageGreen tissue uses light and can store water.
In many cacti the green stem is the main photosynthetic organ. Water storage does not justify constantly wet medium.
Areoles · characteristic short shootsSpines, shoots or flowers can arise here.
Areoles are characteristic of cacti. Spines are not absorbing roots; use protective handling aids.
Growth · observe the tipAssess development by species and seasonal rhythm.
Feed according to the label during active growth. Pause during rest.
How nutrients enter cacti
Select a point in the picture or choose a stage.
Stage 01 / 04
Water carries nutrients to the roots
The mixture reaches the compost around the fine roots. Dissolved nutrients are available at the interface between roots and growing media.
Good to knowAlways dilute the concentrate and keep to the stated dosage.
A closer look
Watering carries dissolved nutrients into the growing medium around the roots. Contact with the absorbing root surfaces is the first step.
Stage 02 / 04
Roots take up dissolved nutrients
Fine root hairs increase contact with the growing medium. Tiny transport proteins in the membranes surrounding root cells help dissolved nutrients enter the cells.
Good to knowRoots take up nutrients; they do not simply absorb all the fertiliser along with the water.
A closer look
Root hairs increase the contact area. Transport proteins in cell membranes enable mineral ions to enter; water movement and nutrient uptake are distinct processes.
Stage 03 / 04
An inner layer controls the route
On their way into the root, nutrients meet a special layer of cells. It prevents substances from simply flowing through the gaps between cells and helps the plant control uptake.
Good to knowMore fertiliser does not automatically mean better nutrition.
A closer look
Nutrients move through the root tissues. The endodermis acts as a control layer: its barrier interrupts unrestricted movement along the cell walls.
Stage 04 / 04
Transport channels carry water and nutrients
Inside the root are fine transport channels called xylem. Water and absorbed nutrients can travel through them towards shoots and green stems.
Good to knowHealthy roots and suitable growing conditions are important for nutrient supply.
A closer look
After entering the vascular tissue, nutrients can travel with the water stream in the xylem towards the shoot. Uptake and nutrient supply also depend on root health and growing conditions.
Stage 01 / 04
Diluted solution is applied to the stem
The prepared solution wets the green stem surface. Avoid open flowers and always dilute correctly.
Good to knowThis product is labelled for foliar application. Always dilute correctly.
A closer look
Foliar feeding places diluted nutrient solution on the green stem surface. Wetting depends on factors including the green stem surface and the solution.
Stage 02 / 04
Nutrients must cross the protective surface
The green stem surface protects the plant. Dissolved nutrients can pass through this layer; tiny openings in the stem may also play a part. Uptake varies with the type of stem and the conditions.
Good to knowDifferent green stems do not absorb a nutrient solution equally well.
A closer look
Dissolved nutrients can pass through the protective cuticle; pathways involving stomata may also contribute. Their relative importance varies with plant species and conditions.
Stage 03 / 04
Cells inside the stem take up nutrients
Behind the surface lies living stem tissue. Its cells can take up nutrients that have crossed the surface and use them for their activities.
Good to knowA droplet on a stem does not yet mean its nutrients have been absorbed.
A closer look
After crossing the surface, nutrients can be taken up by living stem cells. The amount depends on factors including the nutrient, formulation and environmental conditions.
Stage 04 / 04
Nutrients are used in the stem and may move onward
The plant can use absorbed nutrients within the stem. Some can also reach other plant parts. This depends on the nutrient and the plant's condition.
Good to knowFoliar feeding does not mean every nutrient immediately reaches the whole plant.
A closer look
Absorbed nutrients can be used within the stem. Whether and how far they move to other plant parts depends on the nutrient and the plant's condition.
Development influences requirements
Care that follows each flush of growth
Young plant & establishment
For young plants, consider root establishment, light and nutrients already in compost. Unrooted cuttings are not established pot plants.
Active stem growth
Feed every 2–4 weeks according to the label only during active growth. Assess watering separately from moisture needs.
Lower light · slower growth
Do not feed during rest. Match temperature, light and water to the cactus species.
Actual development matters: species, location and season affect the pace. Plant size alone determines neither dose level nor watering volume.
Application & calculator →Growing conditions & care problems
Adapt care to the growing conditions and stage of growth. If you notice changes, check light, water and roots first — then take targeted action.
Caring for cacti
Choose the position for the species
Many desert cacti grow with bright light and dry periods. Forest cacti follow a different rhythm. Identify the species first, then coordinate light, medium and watering.
Manage changes of position carefully
Many desert cacti grow with bright light and dry periods. Forest cacti follow a different rhythm. Identify the species first, then coordinate light, medium and watering.
Pots & repotting · consider the roots
Repot when needed. Allow for existing nutrients in the medium and preserve healthy roots.
What is changing on your cactus?
Mealybugs and root mealybugs
Inspect cottony deposits around areoles and roots. Check new plants before adding them to a collection.
Soft spots and rot
Persistent wetness, cold and root damage can interact. Assess affected plants separately; fertiliser is not a treatment.
Long thin growth
Insufficient light can produce unusually thin growth. Improve light gradually rather than moving abruptly into full sun.
Understand care problems
These details help distinguish growing conditions, root or nutrition problems and an infestation:
- Photos of the whole plant, ribs, areoles, stem base and affected areas.
- Species or cultivar, pot size, compost and position near a window; root photos where relevant.
- When symptoms began and progressed, pot moisture, repotting date and previous fertiliser or plant protection applications.
Check the cause, crop and authorised growing location first. A product recommendation does not approve mixing.
PLANTS A–Z
The right care for your plant.
The group profile explains desert and forest cacti, areoles, grafts and safe handling of spines. Its calendar is a starting point to adapt to the species.
View the plant profile
PRACTICAL ADVICE
Coordinate repotting and feeding
Consider pre-fertilised medium and extra feeds together: the guide explains the relationship.
Read the plant nutrition guide
Quality products
Horticultural expertise
Our own production
Made in GermanyGREEN24's own products
Quick answers before you buy (FAQ)
How far do the pack sizes go?
250 ml makes 50 litres and the twin pack 100 litres of feed solution.
Do all cacti need the same care?
No. Desert cacti, tropical forest cacti and hardy species differ in light, water and rest requirements. The label defines dilution; the plant determines when feeding is appropriate.
When should I feed?
Only during active growth and when needed. 5 ml per 1 l of water, every 2–4 weeks. Account for existing nutrients and freshly pre-fertilised compost.
Which compost fits?
PRO Humus for cacti and succulents needing some humus; not an automatic choice for every specialist.
Will fertiliser firm up a soft cactus?
Soft tissue may relate to wetness, root damage or cold. Assess the cause and root condition before adding nutrients.
Safety and storage
Safety instructions
SDS – Safety data sheet available on request.
- Do not use undiluted. Shake well before use.
- Keep out of reach of children and animals.
- Preferably use low-lime water or rainwater at 15–25 °C.
- Do not apply in direct sunlight or at temperatures below 5 °C or above 30 °C.
- Apply to a pre-moistened root zone or spray the foliage. Do not spray open flowers.
Wear protective clothing, rubber gloves and safety glasses, and use clean, suitable equipment.
Wash your face and hands thoroughly. Use diluted fertiliser promptly and keep it out of water bodies and wastewater.
Product GPSR safety information
The original leaflet supplements safe application. This product's dilution stated above remains authoritative.
Storage
Storage & product quality
Store in a dry, dark place above +8 °C and no higher than +38 °C. Keep out of reach of children and animals.
Keep tightly closed in the original container, separate from food and animal feed.
Avoid strong temperature fluctuations. Excessively high or low storage temperatures can cause discolouration and crystals. These crystals dissolve by the time the product is diluted; this does not affect product quality.
The packaging is suitable for material recycling and marked accordingly. Only send thoroughly cleaned containers to the appropriate recycling system. Never empty residual product or rinsing water into sewers, other drains or bodies of water.
Our information reflects current knowledge and describes the product and its uses. When the instructions are followed, the product is suitable for the recommended purposes. Storage and application are outside our control, and not all circumstances can be foreseen. We stand behind sound product quality at the time of delivery.
Manufacturer / company placing the product on the market
Guides for this product
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