Water-soluble & available
All nutrients are water-soluble. In the fully diluted mixture, they are available for feeding through roots and leaves.
Click the image to explore the details
Move your mouse over the image for a closer look
Quality products
Horticultural expertise
Our own production
Made in GermanyGREEN24's own products
Start simply · explore when you want
Small plants. Different requirements.
A rock garden brings plants together through site and design, not through a botanical family. It can include cushion perennials, rosettes, bulbs and small woody plants. First check the particular species, root space and nutrients already available.
- NPK declaration
- 2.8 + 4.0 + 5.4With declared trace nutrients.
- Dilution
- 5 ml per 1.5 l of waterApply diluted only.
- Feeding interval
- Every 6–8 weeksDuring active growth.
- Application
- Root & foliarChoose the method for the plant and conditions.
Does it fit your care routine?
The species still matters
For rock garden and alpine plants. Not every low-growing plant likes dry or lime-rich soil; the particular species remains decisive.
Allow time between feeds
During actual active growth. This diverse group does not share one fixed feeding calendar.
Check moisture before feeding
Account for initial nutrients, soil reserves and previous applications. Lean sites and small root spaces do not automatically call for regular supplementary feeding.
Application in one place
Measure. Mix. Apply.
Dilution calculator for rock garden plants
Enter the water volume actually needed. Height and overall width can give a rough guide for one clearly defined plant or connected cushion. For very flat rosettes, mixed troughs or entire beds, use the water-volume mode.
Your water amountRough watering-volume guide
1.5 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.
A rough root-watering guide for one defined plant or connected cushion only. Measure height from soil level and the full vegetated width, not an individual rosette leaf or the area of the whole rock garden. For very flat plants and mixed plantings, use actual water volume. Check moisture and roots; this is not an individual water requirement or a foliar spray volume.
How the guide is calculated
General GREEN24 guide: height (m) × width (m) × 3–4 litres. Centimetres are converted to metres. The concentrate amount follows this fertiliser’s dilution. The guide does not measure individual water requirements.
Prepare a clean container
Use a clean watering can or sprayer; preferably low-lime water or rainwater at 15–25 °C.
Calculate the amount
Choose the water volume. The size guide may help with a suitable individual plant; calculate very flat rosettes, troughs and mixed beds from the water actually needed.
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? Every 6–8 weeks during active growth when needed. Account for existing nutrients, pre-fertilisation and previous applications. Growing periods differ between species; do not force additional feeding during dormancy.
Watering · through the roots
Pre-moisten the root zone and distribute the solution accurately. Ensure drainage in crevices and troughs. Free-draining does not mean allowing every species’ roots to dry out completely; check moisture according to the plant.
Spraying · wet suitable foliage
Choose foliar application only where appropriate for the species and leaf surface, in the morning, evening or under overcast skies. Avoid open flowers. Even for small cushions, this belongs to the same feeding plan as root application; do not automatically feed twice.
Product characteristics Liquid NPK concentrate for rock garden plants and alpine gardens
Dilute with water; the label permits root and foliar feeding. The full nutrient declaration has its own section.
- Net mass: 281 g per 250 ml bottle.
| Pack size | Price |
|---|---|
| 250 ml | €9,85 EUR |
| 500 ml – twin pack (2 × 250 ml) | €18,95 EUR |
Nutrient composition NPK 2.8 + 4.0 + 5.4
Product pH: 6.5. This describes the concentrate, not the resulting soil pH.
- 2.8% total nitrogen (N), comprising 0.65% nitrate nitrogen, 0.35% ammoniacal nitrogen and 1.80% urea nitrogen.
- 4.0% water-soluble phosphate (P₂O₅).
- 5.4% water-soluble potassium oxide (K₂O).
- 0.005% water-soluble boron (B).
- 0.002% water-soluble copper (Cu), as EDTA chelate.
- 0.010% water-soluble iron (Fe), as EDTA chelate.
- 0.006% water-soluble manganese (Mn), as EDTA chelate.
- 0.0005% water-soluble molybdenum (Mo).
- 0.002% water-soluble zinc (Zn), as EDTA chelate.
Compost, other fertilisers & care products
Pre-fertilised soil and fertiliser already in the root ball contribute to the nutrient supply. Each of the four care products listed below can be mixed with our liquid fertiliser. When applying them together, follow both products’ specific instructions; conflicting or stricter directions take precedence. Do not mix undiluted concentrates.
Our rock garden fertiliser is compatible individually with Schädlings-Frei Organic, Trauermückenfrei Organic, KIRON Milben-Ex or Rosen Pilz-Frei BOCCACIO. This confirmation covers the fertiliser plus one of these products at a time. Check the particular plant species and both products’ directions.
Request the compatibility table →Beyond NPK · understand the formulation
Well mixed – available to leaves and roots
Water-soluble nutrients supplement mineral nutrition during growth. In rock garden plants, actual need depends on the species, root space and existing reserves. Root and foliar feeding are alternative routes within one nutrition plan.
Protected trace nutrients
Copper, iron, manganese and zinc are declared as EDTA chelates. This binding helps keep these trace nutrients available in solution.
pH buffering for the mixture
The buffer system helps regulate the pH of the finished watering or spraying solution. The source water also influences the resulting value.
Even coverage on the leaf
Good wetting and adhesion support distribution on suitable leaf surfaces. With dense cushions, hairy leaves or rosettes, the particular species still determines whether foliar feeding is appropriate.
Reduce hard-water effects
The formulation helps reduce unwanted hard-water effects and deposits on leaf surfaces. Low-lime water or rainwater provides a useful starting point; this does not replace the soil requirements of each species.
Feed with plant tolerance in mind
High plant compatibility under appropriate use also matters for sensitive crops. For small cushions and rosettes, accurate dilution, appropriate foliar treatment and protection from sun and heat remain important.
Understand leaf function and growth
Nitrogen is needed for chlorophyll and proteins, phosphorus for energy transfer and potassium for water regulation. Leaves, growing shoots and flowers use these functions in different ways. Water-storing leaves, fine cushion shoots and particular flower colours are species traits, not promised effects of the concentrate.
Chelation can reduce unwanted hard-water effects; it does not remove calcium or magnesium from the water. Product pH 6.5 describes the concentrate. It is not a guaranteed target for the finished solution or soil, and does not automatically make lime-rich compost suitable for acid-loving species.
Use clean, suitable watering or spraying equipment. Measure the water and calculated concentrate quantity carefully.
Get to know plants among rocks
Rosettes. Flowering cushions. Small habitats.
Leaf textures and flowers can be enjoyed at close range in a rock garden. A sunny stone edge may be hot and dry, while a shaded crevice stays cooler and moister. Suitable plant choices make use of these differences.
Choose the growing site before planning nutrition.
The concentrate supplements nutrients during growth where needed. It cannot turn a hot limestone site into a cool, acidic root zone. Habit and flowering sequence depend on species, cultivar and position, not on a higher concentration.
Rosettes around a central growing point
Houseleeks form rosettes with water-storing leaves. Other rosette plants can have thinner leaves and different moisture needs. Rosette shape alone therefore establishes neither succulence nor a shared watering plan.
Cushions formed by many short shoots
A cushion consists of closely grouped shoots. Low, sun-loving phlox species can cover stone edges, while other phlox species have different requirements. Tidy spreading cushions selectively when needed so they do not overwhelm smaller neighbours.
Flowering sequences, not continuous bloom in every plant
A well-chosen planting can provide a succession of different flowers. Each species has its own rhythm. After flowering, distinguish spent stalks from healthy leafy shoots; more fertiliser does not automatically extend every flowering period.
A dry-site group within the rock garden
This motif shows a dry-looking planting with flowering cushions and succulent rosettes. Cool, moisture-loving rock plants or acid-loving species need different conditions; this example does not describe them all.
From the root zone to cushions, rosettes and flowers
How do rock garden plants use nutrients?
The roots of your rock garden plant access water and dissolved nutrients within their limited soil space. Green leaves use light to produce the plant’s own sugars. Nitrogen is needed for chlorophyll and proteins, phosphorus for energy transfer and potassium for water regulation. New cushion shoots, rosette leaves and flowers require this supply during their respective growth stages. Species and site determine appropriate moisture and nutrient availability; low growth does not automatically mean drought tolerance.
Roots · explore the soil spaceAbsorbing roots connect the plant with water and dissolved nutrients.
Usable root space among rocks is often limited. Free drainage and moisture appropriate to the species are both important. Dry houseleek conditions cannot be transferred to primulas or other rock plants growing in cool, moist settings.
Shoots · build cushions and clumpsShort, closely grouped shoots form cushions; other species grow as rosettes or small clumps.
Growing shoots need nutrients and sugars from the leaves. Phosphorus contributes to energy transfer. Naturally compact growth remains a species or cultivar trait; stronger feeding is not a goal for plants intended to occupy little space.
Leaves · use light and produce compoundsFine cushion leaves and fleshy rosette leaves both carry out photosynthesis.
Nitrogen is part of chlorophyll and proteins; iron and manganese have further metabolic roles. Some species store water in their leaves, while others have thin foliage. This creates different moisture requirements, not a blanket higher or lower concentration of this fertiliser.
Flowers · enable reproductionFlowers develop according to each species’ own rhythm.
Flower formation and seed ripening require materials and energy from the whole plant. Phosphorus is involved, but more phosphorus does not force flowering or a fixed flowering date. Site, developmental stage and season still matter; do not spray open flowers with fertiliser solution.
Understanding plant feeding
How nutrients enter your rock garden plant
Dissolved nutrients must reach absorbing roots or suitable leaf surfaces. In the soil, water, oxygen and an appropriate root zone are important. The plant regulates uptake and onward transport through living cells and conducting tissue. Leaf shapes and surfaces differ between cushions, rosettes and woody plants. Root and foliar feeding should therefore be chosen to suit the species within one nutrition plan.
Select a point in the picture or choose a stage.
Stage 01 / 04
The solution reaches the root zone
The finished dilution enters pre-moistened soil and comes into contact with absorbing root regions.
Good to knowEven drought-tolerant species should not be fed onto dried-out roots.
A closer look
The finished dilution enters pre-moistened soil and comes into contact with absorbing root regions. Even drought-tolerant species should not be fed onto dried-out roots.
Stage 02 / 04
Uptake at living roots
Absorbing root surfaces access water and dissolved nutrients. Their structure differs between species; the shared functional model does not prescribe one root anatomy.
Good to knowA narrow crevice and a planted trough hold different water and nutrient reserves.
A closer look
Absorbing root surfaces access water and dissolved nutrients. Their structure differs between species; the shared functional model does not prescribe one root anatomy. A narrow crevice and a planted trough hold different water and nutrient reserves.
Stage 03 / 04
Root cells regulate entry
Membranes and transport proteins regulate entry of dissolved nutrients into living cells. Water movement alone is not the same as regulated nutrient uptake.
Good to knowWaterlogged, damaged roots are not repaired by a stronger fertiliser solution.
A closer look
Membranes and transport proteins regulate entry of dissolved nutrients into living cells. Water movement alone is not the same as regulated nutrient uptake. Waterlogged, damaged roots are not repaired by a stronger fertiliser solution.
Stage 04 / 04
Onwards to shoots, leaves and flowers
Conducting tissue connects roots with above-ground organs. Water and absorbed nutrients can reach growing shoots and leaves; further use depends on the plant’s condition.
Good to knowNaturally compact growth is not evidence of underfeeding.
A closer look
Conducting tissue connects roots with above-ground organs. Water and absorbed nutrients can reach growing shoots and leaves; further use depends on the plant’s condition. Naturally compact growth is not evidence of underfeeding.
Stage 01 / 04
The solution wets suitable leaves
Distribute the finished dilution over suitable leaf surfaces, not open flowers. Follow light and temperature limits and consider the particular species.
Good to knowChoose the application route carefully for dense cushions or sensitive leaf surfaces.
A closer look
Distribute the finished dilution over suitable leaf surfaces, not open flowers. Follow light and temperature limits and consider the particular species. Choose the application route carefully for dense cushions or sensitive leaf surfaces.
Stage 02 / 04
Across the protective surface
The leaf surface protects living tissue. Dissolved nutrients can cross it; leaf age, hairs, protective layers and conditions influence the amount absorbed.
Good to knowRosette shape or fleshy leaves do not justify a different concentration of this fertiliser.
A closer look
The leaf surface protects living tissue. Dissolved nutrients can cross it; leaf age, hairs, protective layers and conditions influence the amount absorbed. Rosette shape or fleshy leaves do not justify a different concentration of this fertiliser.
Stage 03 / 04
Use within living leaf cells
After crossing the surface, leaf cells can take up nutrients and use them in metabolism. A drop on the leaf alone does not establish uptake.
Good to knowNatural dormancy, cultivar colour and damage need to be assessed separately.
A closer look
After crossing the surface, leaf cells can take up nutrients and use them in metabolism. A drop on the leaf alone does not establish uptake. Natural dormancy, cultivar colour and damage need to be assessed separately.
Stage 04 / 04
Use and possible redistribution
Whether nutrients move from a leaf to other organs depends on the nutrient and plant condition. This does not establish immediate full nutrition of an entire cushion or mixed planting.
Good to knowRoot and foliar feeding belong to one plan; two routes do not mean twice the amount.
A closer look
Whether nutrients move from a leaf to other organs depends on the nutrient and plant condition. This does not establish immediate full nutrition of an entire cushion or mixed planting. Root and foliar feeding belong to one plan; two routes do not mean twice the amount.
Development influences requirements
Match establishment, growth and rest to the species
Establishment & new roots
Newly planted specimens, rooted divisions and offsets need suitable soil contact and moisture. Check growth and initial nutrients before adding a feed. The standard dilution remains unchanged; smaller plants do not automatically need a different concentration.
Develop leaves, shoots and flowers
Feed at the specified interval during actual growth when needed. Flowering cushions, rosettes and small woody plants need not grow or flower at the same time. Do not push a compact species towards stronger growth with more frequent feeds.
Species-specific resting periods
Some species remain green, while others lose their foliage; bulbs may rest after their own growing season. Do not add fertiliser during dormancy. Adjust water to species and condition rather than drying all plants out at the same time.
The calendar of a mixed planting is not one shared feeding or flowering schedule. The condition of each species at its actual site is decisive.
Application & calculator →Your growing conditions matter
Which rocky setting suits your plants?
A stone edge can receive strong sun and heat, while a deep crevice stays cooler. Lime-loving, acid-loving and moisture-dependent species need different root conditions. The design should follow these needs, not the other way round.
Trough & bowl · account for limited reserves
Provide clear drainage holes, appropriate planting depth and a growing medium suited to the species. Account for initial nutrients without assuming one universal time to start feeding. Do not bury rosette centres and check moisture in the actual root zone.
Rock bed · match plants and stone
Check sun, soil reaction and moisture for the selected species. Houseleeks are an example for sunny, well-drained positions; Saxifraga paniculata tolerates lime, but not every saxifrage shares those needs. Keep spreading cushions from overwhelming small neighbours.
Winter · assess frost and wetness separately
Check drainage routes and pot feet, and remove wet fallen leaves from sensitive cushions. Hardy species do not automatically need warm quarters; frost-sensitive members require suitable protection. There is no single frost limit for all rock garden plants.
Crevices & specialist sites · look closely
A cool rock crevice may remain moister than a hot, dry stone edge. Small acid-loving shrubs such as Rhododendron impeditum need suitable humus-rich root space; a lime-rich dry mix is not automatically appropriate.
Choose growing medium and tools to suit the plants
Rock garden compost suits the drought-tolerant plants for which it is intended. A narrow planting trowel helps place compost accurately between stones. The soil reaction and moisture needs of your species remain decisive.
-
Rock Garden Compost
€8,95 View productThe existing rock garden compost contains mineral and organic components, including peat. Account for its initial nutrients and the soil reaction required by the species.
-
Sneeboer Planting Trowel with Cherry Wood Handle
€54,95 View productUse the planting trowel to place compost accurately; protect sensitive rosette centres and maintain the existing planting depth.
Understand plant care problems
What is changing on your rock garden plant?
Soft plant bases, chewing damage, dry leaf edges and lack of flowers have different causes. The exact species and its small growing site are especially important; a group label such as alpine plants is not enough for diagnosis.
Aphids on young shoots
Inspect tender shoot tips and leaf undersides. Identify the plant and pest before treatment; the group name does not establish a pesticide authorisation.
Slugs and vine weevils
Chewing damage and injured roots can have different causes. Inspect young plants, pot edges and root balls, and identify the cause.
Rot associated with persistent wetness
Soft plant bases and persistently wet roots call for checking drainage, compost and position. Seek advice on affected tissue; extra feeding does not remove the cause.
Heat, drought or unsuitable pH
Dry edges or weak growth do not prove a fertiliser deficiency. Species from cool or acidic sites can struggle among hot limestone even when feeding is correct.
Advice for your rock garden plant
These details help distinguish normal development, site problems and possible pests:
- Photos of the whole plant, affected leaves or rosette base, and the immediate surroundings among stones or in the trough.
- Species or cultivar, planting date, growing medium and stone, sun or shade, and rainfall and watering conditions.
- Onset and progression, root and soil moisture, chewing marks, recent care work, and previous fertilisers and plant-protection products.
Identify the particular species and cause before treatment. Aphids, slugs, vine weevils and wetness problems require different responses. A fertiliser mixing confirmation does not authorise a product for every plant in this group.
Confirmed mixing partners
These four plant-care products are each compatible with our liquid rock garden fertiliser.
-
Dr. Stähler
Schädlings-Frei-Organic – 100 ml
€16,95
Insect control: check the pest, plant species and authorised application site.
Mixable with GREEN24 liquid fertilisersView product & application -
Dr. Stähler
Trauermückenfrei Organic – 30 ml, neem concentrate against fungus gnat larvae
€9,99
For fungus gnat larvae: follow the authorised crop and watering application.
Mixable with GREEN24 liquid fertilisersView product & application -
Dr. Stähler
KIRON Milben-Ex – 30 ml
€12,95
Mite control: identify the infestation and follow the authorised application.
Mixable with GREEN24 liquid fertilisersView product & application -
Dr. Stähler
BOCCACIO Rosen Pilz-Frei – 24 ml
€13,95
Fungal control: check the disease, plant species and authorised growing situation.
Mixable with GREEN24 liquid fertilisersView product & application
Mixability applies to fertiliser plus one product at a time, not to all products mixed together. Follow crop, pest, application site, dose, waiting periods and the stricter requirements of both sets of instructions. Do not mix undiluted concentrates.
Use plant protection products safely. Always read the label and product information before use.
Quick answers before you buy (FAQ)
Is this fertiliser suitable for my plant?
For rock garden and alpine plants. Not every low-growing plant likes dry or lime-rich soil; the particular species remains decisive.
How do I dilute the concentrate?
Dilution: 5 ml per 1.5 litres of water.
Measure out the concentrate and mix it with the stated amount of water. Never apply undiluted.
How much solution does one pack make?
- 250 ml: 75 litres of diluted solution
- 500 ml – twin pack (2 × 250 ml): 150 litres of diluted solution
Calculated at the stated standard dilution; the amount needed per application depends on the plant and growing conditions.
What should I check before use?
Do not apply in sunlight, below 5 °C or above 30 °C. Never apply the concentrate undiluted.
Safety and storage
Safety instructions
SDS – Safety data sheet available on request.
- Shake before use. Never apply undiluted.
- Feed the pre-moistened root zone or spray foliage. Avoid open flowers.
- Preferably use low-lime water or rainwater at 15–25°C.
- Do not apply in direct sunlight, below 5°C or above 30°C.
- Keep out of reach of children and animals.
Avoid contact with eyes, skin and clothing. Do not inhale spray mist. Wear protective clothing, rubber gloves and safety glasses when handling the product. Keep away from food and beverages. Wash your face and hands thoroughly after use. Official advisory recommendations take precedence. Fertilisers may leave permanent stains on surfaces. Do not allow fertiliser to enter bodies of water or wastewater.
Official advisory recommendations take precedence.
Wash your face and hands thoroughly. Use diluted fertiliser promptly and keep it out of water bodies and wastewater.
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 large temperature fluctuations. Temperature-related discolouration or crystals may occur; the crystals dissolve by the dilution stage at the latest and do not impair product quality. For this fertiliser, store dry and dark above 8 °C and at no more than 38 °C. Use diluted fertiliser promptly.
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
Product GPSR safety information
The original leaflet explains safe preparation and use. The product-specific dilution and longer interval between feeds apply to this rock garden concentrate. General leaflet guidance does not establish another dilution setting or shared monthly schedule.
Guides for this product
Similar products
More products to compare and discover.
-
Cactus Fertiliser
From €9,85 View productCompare the range if you grow cacti: a separate cactus fertiliser with its own formula and directions. Not a blanket alternative for every rock garden plant.
