Water-soluble & available
Phosphate and potassium oxide are declared water-soluble. Add the measured concentrate to water and mix thoroughly.
Click the image to explore the details
Move your mouse over the image for a closer look
- NPK concentrate with trace nutrients for bonsai
- For root and foliar feeding
- Product-specific dilution calculator
Small pot. Individual character.
For bonsai within the labelled use. Bonsai is a growing form: an indoor ficus, an outdoor maple and a juniper have different requirements.
- Declared NPK
- 1.5 + 3.1 + 3.2With declared trace nutrients.
- Dilution
- 5 ml per 1 litre of waterEvery 1–2 weeks during active growth.
- Application
- Roots & foliageDilute with water before use.
- Regular application period
- March–SeptemberApply only during active growth.
Product information
Application & dosageMix and apply to suit the growth stage.
Application in one place
Measure. Mix. Apply.
Dilution calculator · bonsai
Dilution: 5 ml per 1 litre of water.
Your water amountRough watering-volume guide
1 l
Matching concentrate amount
5 ml
1 capful = 5 ml. Use a suitable measuring aid for smaller partial amounts.
Enter a water amount from 0.1 to 1,000 litres.
Use the water volume actually needed. Plant height alone does not provide a reliable watering volume.
How the guide is calculated
Concentrate (ml) = water (l) × 5 ÷ 1.
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 actually needed. Check root-ball moisture and drainage before watering.
Add some water first
Start by filling the container with part of the chosen water volume.
Shake & measure
Shake the bottle. 1 capful = 5 ml; use a measuring aid for smaller partial amounts.
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 litre of water. Every 1–2 weeks during active growth. Regular application period: March–September.
Watering · through the roots
Moisten the root ball first, apply the diluted solution and allow it to drain fully.
Spraying · onto the leaves
Spray foliage only, using the stated dilution. Avoid open flowers and follow sunlight and temperature limits.
Characteristics & pack sizesThe concentrate and pack sizes at a glance.
Net mass: 269 g for 250 ml.
| 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 at the labelled standard dilution; account for pack size and existing nutrients.
Does this fertiliser suit your plant?
Bonsai
For bonsai within the labelled use. Bonsai is a growing form: an indoor ficus, an outdoor maple and a juniper have different requirements.
Follow active growth
Every 1–2 weeks during active growth. March–September.
Consider the root zone
Check moisture in the bonsai pot frequently and moisten before feeding. After substantial root pruning, allow for recovery first. Temperate hardy species need their seasonal rest outdoors.
Beyond NPK · understand the formulation
Well mixed – available to leaves and roots
The full product-specific nutrient declaration is shown in the product information.
Protected trace nutrients
Refer to the chelates and trace nutrient amounts declared on this bottle.
Reduce hard-water effects
Prefer low-lime water or rainwater at 15–25 °C, following this product’s own instructions.
Measure accurately and feed to need
Follow the complete original pack declaration and storage instructions.
Nutrients and plant development
Nitrogen contributes to chlorophyll and proteins, phosphorus to energy transfer and potassium to water regulation. Growth also depends on light, water and healthy roots.
Account for water quality and existing nutrients. The dilution does not establish a fixed soil or prepared-solution pH.
Use clean, suitable watering or spraying equipment. Measure the water and calculated concentrate quantity carefully.
Products
Use other care products according to their own instructions. A product recommendation does not confirm tank mixing.
Do not mix undiluted concentrates. Follow each product’s own application method and dose.
Nutrient composition · NPKDeclared nutrients and their forms.
Declared nutrient percentages.
Concentrate pH: 6.8.
Product pH is not a guaranteed pH for soil or diluted feed solution.
- 1.5 % total nitrogen (N)
- 1 % urea nitrogen
- 3.1 % water-soluble phosphate (P₂O₅)
- 3.2 % water-soluble potassium oxide (K₂O)
- 0.003 % boron (B)
- 0.0012 % copper (Cu) · EDTA chelate
- 0.006 % iron (Fe) · EDTA chelate
- 0.0036 % manganese (Mn) · EDTA chelate
- 0.0003 % molybdenum (Mo)
- 0.0012 % zinc (Zn) · EDTA chelate
GREEN24 · Plant knowledge
Small pot. Individual character.
Trunk, root flare and branches create a deliberate tree form. The pot restricts roots but cannot replace species-appropriate care.
Leaves and needles
Evergreen or deciduous, conifer or broad-leaved according to species. Small leaves do not identify a species.
Growth and care
Bonsai results from care and training, not a special dwarf seed. A grafted crown can have different leaves from its rootstock.
The root zone
Check the small pot all year, especially often in warm or windy weather. Water slowly with a fine rose until the root ball is evenly moist and excess drains. Match care to the tree species rather than a fixed daily volume.
Matching products
-
GREEN24
Bonsai Compost
From 5.95 €
( 2.38 €/ l)
For bonsai in shallow pots and containers. Bonsai describes a growing style, not a plant species. Timing, root pruning and the preferred mineral content must therefore suit the tree. According to the label, review supplementary feeding after 4–6 weeks. Account for existing nutrients and root condition.
2.5 litres · 5 litres
Delivery time: In stock · 1–3 days (DE)
Incl. VAT, plus shipping costs
-
GREEN24
Kalk-Frei – Anti-Kalk concentrate for watering water
From 6.95 €
( 27.80 €/ l)
For hard irrigation water, pretreat according to its instructions, settle for 5–6 hours and decant carefully. This is not approval for tank mixing.
250 ml · 1 litre · 5 litres
Delivery time: In stock · 1–3 days (DE)
Incl. VAT, plus shipping costs
-
BERGER
BERGER 5610 narrow planting trowel
9.95 €
For adding growing medium and small planting jobs. Avoid damaging roots.
Delivery time: In stock · 1–3 days (DE)
Incl. VAT, plus shipping costs
-
GREEN24
Garden & planting bag Pro, 140 L
10.90 €
For collecting clippings and plant debris during care and repotting.
Delivery time: In stock · 1–3 days (DE)
Incl. VAT, plus shipping costs
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.
Roots, leaves and new shoots
Roots · absorb and anchorFine, shallow roots take up water and dissolved nutrients.
Assess root space, moisture and aeration for the actual species. Allow recovery after root work; do not assume one soil pH suits all woody plants.
Leaves · capture energySimple leaves use light to make sugars; winter foliage depends on species.
Yellow leaves with green veins warrant checking soil reaction, water and roots. This alone does not identify a specific deficiency or justify a higher dose.
Shoots · support & connectWoody branches carry leaves and terminal buds.
Choose pruning timing and extent for species and vigour. Woody plants differ in their ability to regrow from old wood.
How nutrients enter your bonsai
Select a point in the picture or choose a stage.
Stage 01 / 04
The solution reaches the root ball
Apply the diluted mixture to the previously moistened root zone. Wet the root ball evenly without leaving water standing in an outer pot.
Good to knowAssess wilting through root-ball moisture and root health before increasing fertiliser.
A closer look
The first step is contact between dissolved nutrients and root regions capable of uptake. The diagram shows this function, not a species-specific tissue section. Assess wilting through root-ball moisture and root health before increasing fertiliser.
Stage 02 / 04
Uptake at the fine roots
Fine roots and root hairs contact the soil or growing medium. Dissolved nutrients enter root cells through regulated processes.
Good to knowFresh compost and existing soil reserves already contribute to the nutrition of your bonsai.
A closer look
Root hairs increase the contact area. Transport across cell membranes is distinct from water movement alone. Fresh compost and existing soil reserves already contribute to the nutrition of your bonsai.
Stage 03 / 04
Root cells regulate uptake
Cell membranes and transport proteins regulate the entry of dissolved nutrients. These processes are distinct from water moving through the plant.
Good to knowA stronger concentration cannot replace healthy roots or adequate rooting space.
A closer look
Controlled processes within living root cells lie between the surface and the conducting tissue. Functional blocks do not depict the entire root anatomy. A stronger concentration cannot replace healthy roots or adequate rooting space.
Stage 04 / 04
Onwards to shoots and leaves
After uptake, water and nutrients pass through conducting tissue to aerial plant parts. Growing conditions influence development.
Good to knowConducting tissue connects roots and new shoots. Development also depends on growing conditions.
A closer look
Xylem transports water and dissolved substances. Root health and growing conditions affect transport; leaf colour alone does not establish nutrient status.
Stage 01 / 04
The solution wets the leaves
Apply the diluted mixture finely to the leaves. Avoid open flowers; they are not the target of foliar feeding.
Good to knowCount foliar applications within the shared feeding plan, not automatically on top of a full root application.
A closer look
The leaf surface must contact the diluted solution. Wetting is the first step, not evidence that nutrients have already been absorbed. Count foliar applications within the shared feeding plan, not automatically on top of a full root application.
Stage 02 / 04
Across the leaf surface
The leaf blade has a protective surface. Dissolved nutrients can cross it; leaf age and application conditions affect uptake.
Good to knowLeaf or plant size alone does not justify a higher concentration.
A closer look
Nutrients can cross the protective cuticle; stomatal routes may contribute depending on conditions. The illustration is a functional diagram, not a species-specific tissue section.
Stage 03 / 04
Use by living leaf cells
Nutrients that have entered the leaf can be absorbed by its cells and used in metabolism. A visible droplet alone is not evidence of uptake.
Good to knowYellowing leaves have several possible causes. Also check soil reaction, watering and roots.
A closer look
After crossing the surface, nutrients can be taken up by living leaf cells. Quantity also depends on the nutrient and surrounding conditions. Yellowing leaves have several possible causes. Also check soil reaction, watering and roots.
Stage 04 / 04
Use and possible redistribution
Redistribution depends on the nutrient and plant condition. Foliar feeding does not guarantee a particular growth rate or flowering.
Good to knowFoliar feeding does not replace healthy roots or checks of light and water.
A closer look
Whether and how far nutrients are redistributed from a leaf varies by nutrient. This does not establish immediate feeding of the whole plant.
Development influences requirements
Distinguish establishment, growth and dormancy
Young plants and establishment
Allow newly planted or root-worked woody plants to establish first. Account for starter nutrients and root condition.
Leaf growth and bud formation
Every 1–2 weeks during active growth. March–September.
Dormancy and winter care
Let outdoor bonsai rest in shelter outdoors and protect pots from severe freezing. Tropical species remain frost-free; no single winter temperature fits every bonsai.
Species, position and active growth determine the care routine.
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.
Site and growing conditions for bonsai
Pots · moisture and rooting space
Check the small pot all year, especially often in warm or windy weather. Water slowly with a fine rose until the root ball is evenly moist and excess drains. Match care to the tree species rather than a fixed daily volume.
Borders · account for soil reserves
Identify the tree first: tropical ficus bright and frost-free, maple and juniper outdoors. Check shallow-pot moisture more often than in large containers.
Winter · consider the species’ rhythm
Let outdoor bonsai rest in shelter outdoors and protect pots from severe freezing. Tropical species remain frost-free; no single winter temperature fits every bonsai.
Repotting & pruning · match the species
Choose timing by species and growth, checking medium and drainage. Follow the full instructions for the linked growing medium.
Understand care problems
Position & water first
Identify the tree first: tropical ficus bright and frost-free, maple and juniper outdoors. Check shallow-pot moisture more often than in large containers.
Recognise pests
Check for scale, mites or aphids according to tree species; inspect branches and leaf undersides.
Assess damage
Rapid drying and persistent wetness can both cause wilting. Check pot moisture and root condition first.
Discuss the care problem
These details help assess growing conditions, root problems or a possible infestation:
- Tree species and photographs of the whole plant and affected parts.
- Position, delivery form, root space and recent care.
- Watering routine, moisture, fertiliser and amounts already used.
Chlorosis can be associated with unsuitable soil pH or damaged roots. Have leaf spots and bud problems identified; adding more fertiliser is not a diagnosis.
PLANTS A–Z
Universal Pro Bonsai Fertiliser in the plant guide
Explore position, root space and care for the actual plant species.
View the plant guide
PRACTICAL ADVICE
What limits plant growth
Consider light, water, root space and nutrients together. More fertiliser cannot solve every care problem.
Read the guide
Quality products
Horticultural expertise
Our own production
Made in GermanyGREEN24's own products
Quick answers before you buy (FAQ)
How much prepared feed does each pack make?
250 ml → 50 l, twin pack → 100 l. Calculated from the stated dilution; plant needs determine the amount applied.
Can every bonsai live indoors?
No. The tree species determines the location. Tropical ficus needs frost-free conditions; maple and juniper remain outdoor bonsai and need protection for their restricted root space.
Should I feed immediately after repotting?
Account for initial nutrients in the compost and root condition. After root disturbance allow recovery, then match further feeding to growth and the label.
How do I prepare a small amount?
5 ml per 1 litre of water. Use a suitable measuring tool and shake the concentrate before use.
Can I use different plant care products together?
Follow the mixing information on this product page and the directions for all products involved. Plant, target organism and application method must match the specific combination.
Safety and storage
Safety instructions
SDS – Safety data sheet available on request.
- Do not use undiluted. Shake well before use.
- 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.
- Keep out of reach of children and animals.
Official advisory recommendations take precedence.
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 this product’s own instructions. Use dilution stages only within their stated scope; standard dilution remains the basis of yield.
Storage
Storage & product quality
Dry · dark · above 8 °C to a maximum of 38 °C Store in a dry, dark place above 8 °C and at no more than 38 °C. Keep out of reach of children and animals.
Keep tightly closed in the original container, separate from food and animal feed.
Dry · dark · above 8 °C to a maximum of 38 °C Store in a dry, dark place above 8 °C and at no more than 38 °C. Keep out of reach of children and animals.
Do not allow fertiliser residues or rinsing water to enter waterways or wastewater. Follow the disposal instructions on the packaging.
Measure concentrate accurately and apply only after dilution. More fertiliser does not compensate for insufficient light, drought or damaged roots.
Manufacturer / company placing the product on the market
Similar products
-
GREEN24
Green Bonsai Fertiliser
From 9.85 €
( 39.40 €/ l)
A separate fertiliser for foliage bonsai. Follow tree species, active growth and its own instructions; do not add another full feed.
250 ml · 500 ml – twin pack (2 × 250 ml)
Delivery time: In stock · 1–3 days (DE)
Incl. VAT, plus shipping costs
-
GREEN24
Bonsai Flower and Fruit Fertiliser
From 9.85 €
( 39.40 €/ l)
For suitable flowering and fruiting bonsai. Follow the tree species and this product’s own application period.
250 ml · 500 ml – twin pack (2 × 250 ml)
Delivery time: In stock · 1–3 days (DE)
Incl. VAT, plus shipping costs
-
GREEN24
Bonsai Complex AF
19.95 €
( 3.99 €/ l)
Ready-to-use 5-litre nutrient solution for suitable bonsai. Do not dilute it as a concentrate; follow its own instructions.
5 l
Delivery time: In stock · 1–3 days (DE)
Incl. VAT, plus shipping costs
-
GREEN24
Bonsai Fertiliser Set · 3 × 250 ml
19.95 €
( 26.60 €/ l)
Alternative bundle: check contents and each product’s instructions. Account for included compost and fertiliser; avoid duplicate feeding.
3 × 250 ml
Delivery time: In stock · 1–3 days (DE)
Incl. VAT, plus shipping costs
Plant sick? Identify a plant? Take a photo – GREEN24AI helps right away.
Plant species, pests, diseases and care in seconds – plus products that really fit, free of charge.