Water-soluble & available
NPK 3.5 + 3.4 + 5.1 Declared nutrient forms are listed under nutrient composition. Dilute the concentrate before use.
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- For Hoya · wax plants
- 5 ml per 1.5 litres of water
- For root and foliar application
Feed hoya plants. Understand roots and growth.
The concentrate is labelled for watering and spraying Hoya species. Intervals apply during active growth. Leaf thickness, light and temperature influence how quickly the plant uses water and nutrients.
- Declared NPK
- 3.5 + 3.4 + 5.1With declared trace nutrients.
- Dilution
- 5 ml per 1.5 l of waterEvery 2–3 weeks during the growing season.
- Application
- Roots & foliageDilute with water before use.
- Storage
- Above 8 °C to a maximum of 38 °CStore in a dry, dark place.
Product information
Application & dosageThree applications: watering, foliar spraying and hydroculture.
Application in one place
Measure. Mix. Apply.
Hoya dose calculator
For watering and foliar spraying: 5 ml per 1.5 litres of water. Enter the amount of water required.
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.
Vine length and plant height do not determine a reliable watering volume. Use the actual water volume required.
How the guide is calculated
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 actual water volume. The calculator uses the confirmed label dilution.
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? For watering and foliar spraying, apply every 2–3 weeks during active growth.
Watering plants grown in compost
For soil or similar growing media, moisten the root ball first, apply the diluted solution and let excess water drain.
Spraying · onto the leaves
Lightly wet the leaves in the morning, evening or overcast conditions, avoiding open flowers. Root and foliar feeding count towards the same feeding schedule, not two parallel programmes.
Characteristics & pack sizesThe concentrate at a glance.
Net mass: 279 g for 250 ml; 1115 g for 1 litre.
The dilution is the same for both pack sizes.
| Pack size | Price | Yield at label dilution |
|---|---|---|
| 250 ml | 9.85 € Unit price ( 39.40 €/ l) | 75.0 l |
| 500 ml – twin pack (2 × 250 ml) | 18.95 € Unit price ( 37.90 €/ l) | 150.0 l |
| 1 litre | 29.95 € Unit price ( 29.95 €/ l) | 300.0 l |
250 ml makes 75 litres, the twin pack 150 litres and 1 litre concentrate 300 litres of prepared feed solution.
Does this fertiliser suit your plant?
Hoya · Wax Plants
Hoya includes climbing and trailing species. Carnosa, bella and linearis do not have identical watering needs. Identify your plant and inspect its root zone.
Follow active growth
For watering and foliar spraying, every 2–3 weeks during active growth.
Consider the root zone
Grow in bright light with protection from fierce summer sun. Let the medium approach dryness according to species and remove excess water. Keep plants in bud in their accustomed position where possible.
Beyond NPK · understand the formulation
Well mixed – available to leaves and roots
The concentrate combines declared major and trace nutrients. Its dilution applies to root and foliar use.
Protected trace nutrients
Copper, iron, manganese and zinc are declared as EDTA chelates. Details are listed under nutrient composition.
Feed according to demand
Consider dilution and growth rhythm together. Fertiliser cannot replace healthy roots or suitable light.
Consider nutrients and growing conditions together
Hoya includes climbing and trailing species. Carnosa, bella and linearis do not have identical watering needs. Identify your plant and inspect its root zone.
Product pH 6.8 according to the declaration. Preferably use low-lime water or rainwater.
Use clean, suitable watering or spraying equipment. Measure the water and calculated concentrate quantity carefully.
Products
Only when both products’ directions allow that exact combination. A product recommendation does not approve tank mixing.
Only when both products’ directions allow that exact combination. A product recommendation does not approve tank mixing.
Nutrient composition · NPKDeclared nutrients and their forms.
Declared nutrient percentages. Product pH: 6.8.
Product pH describes the concentrate, not the pH of soil or diluted feed solution.
- 3.5% total nitrogen (N)
- 3.2% urea nitrogen
- 3.4% water-soluble phosphate (P₂O₅)
- 5.1% water-soluble potassium oxide (K₂O)
- 0.005% boron (B)
- 0.002% copper (Cu) · EDTA chelate
- 0.01% iron (Fe) · EDTA chelate
- 0.006% manganese (Mn) · EDTA chelate
- 0.0005% molybdenum (Mo)
- 0.002% zinc (Zn) · EDTA chelate
Hoya · wax plants
Vines, leaves and wax flowers
Three views of the plant and its care.
Wax flowers in window light
Glossy leaves, long vines and delicate flower clusters: Hoya carnosa combines distinctive foliage with unusual flowers.
Flowers on familiar stems
Keep living flower spurs on Hoya carnosa: new flower clusters may appear at the same points.
Follow the vines and leaves
Hoya carnosa develops substantial leaves and long searching shoots. A suitable support gives its vines something to climb.
Matching products
-
GREEN24
Hoya Compost
11.95 €
( 1.20 €/ l)
Hoya compost for substrate cultivation. Follow the medium’s directions and account for existing nutrients.
10 litres
-
GREEN24
Expanded Clay 8–16 mm
From 6.95 €
( 1.39 €/ l)
Clay granules for suitable container and hydroculture systems. Moisten thoroughly before use and match grain size and pot to the roots.
10 litres · 5 litres
-
GREEN24
Perlite 2–6 mm
0.95 €
( 0.95 €/ l)
To aerate your own potting mixes. Choose the proportion to suit the whole mix; ready-to-use Hoya compost does not need extra perlite.
1 litre
-
GREEN24
Hoya Repotting Set
17.95 €
A repotting alternative with 10 l Hoya compost and 250 ml Hoya fertiliser. The fertiliser is already included.
10 l compost + 250 ml fertiliser
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.
Hoya in hydroponics. With GREEN24 Hoya fertiliser.
Daily care · light, water and flowers
Provide bright light without harsh midday sun. Check root-zone moisture and avoid waterlogging. Keep plants in bud in their accustomed position where possible. Leave living flower spurs on Hoya carnosa; they may flower again.
Winter & repotting · when to pause
Pause feeding and reduce watering when light is low and growth stops. In a warm, well-lit position with continued growth, supply water and nutrients as needed. Do not feed for at least two weeks after repotting; resume when roots are healthy and new growth appears.
Species 1 · carnosa, bella, linearis & pubicalyx
Hoya carnosa: Strong vines and fleshy leaves; tolerates cooler winter conditions than bella. Keep living flower spurs. • Hoya bella: Small and trailing; keep warmer in winter, avoiding both waterlogging and complete drying. • Hoya linearis: Fine trailing growth; keep slightly moist and airy even in winter. • Hoya pubicalyx: Vigorous vines, often with silver markings; new growth may increase water use.
Species 2 · kerrii, australis, obovata & lacunosa
Hoya kerrii: Slow-growing heart-shaped leaves; a single leaf without a stem node will not form a vine. • Hoya australis: Vigorous climber; provide support early and keep slightly moist in winter. • Hoya obovata: Thick round leaves; sufficient light supports flowering. • Hoya lacunosa: Compact vines and small, strongly scented flowers; provide moderate moisture and good root aeration.
Species 3 · curtisii, multiflora, imperialis & caudata
Hoya curtisii: Tiny silver-marked leaves; warm conditions with bright filtered light. • Hoya multiflora: More shrubby growth with shooting-star flowers; keep roots moist and airy. • Hoya imperialis: Large flowers and strong climbing stems; allow room and sturdy support. • Hoya caudata: Hairy flowers, aerial roots and a preference for humid air; flowers may last only one or two days.
Guide: Hoya in hydroculture with Hoya Fertiliser
Base mixture: 5 ml Hoya Fertiliser in 1.5 l of water. For topping up, mix two parts clear water with one part base mixture, for example 1 l water plus 0.5 l base mixture. Use during active growth when water is needed again. At MIN, check root moisture; wait if still wet. Initially refill to the middle mark when needed. Use clear water only in low light without growth. Pause for at least two weeks after repotting. Flush the root zone occasionally and let runoff drain away. Never add concentrate directly to the reservoir. The PDF includes dosing graphics and twelve species profiles.
Download the guide & 12 Hoya species (German PDF)Care problems · identify and act
Buds are dropping
- Symptom
- The plant sheds buds.
- Cause
- A sudden change in light or large fluctuations in root moisture may be responsible.
- Action
- Keep the plant in its accustomed position and water consistently according to its needs.
Deposits or pests on leaves and stems
- Symptom
- Unusual deposits, small scale-like bumps or cottony clusters are visible.
- Cause
- Mealybugs or scale insects may hide in leaf axils and stem nodes.
- Action
- Check leaf undersides and hidden areas. Separate affected plants and identify the pest before treatment.
Limp shoots despite wet roots
- Symptom
- Shoots become limp while the root zone is still wet.
- Cause
- Persistent wetness and damaged roots may interfere with water uptake.
- Action
- Check roots and drainage; do not top up while the root zone remains noticeably wet. Assess damaged roots appropriately rather than adding more fertiliser.
Advice for your hoya
These details help assess growing conditions, root problems or a possible infestation:
- Photographs of the whole plant, roots, leaf undersides and affected areas.
- Genus or cultivar, pot, medium, position and last repotting.
- When the change began, watering pattern and previous feeding or care.
Discoloured leaves do not confirm nutrient deficiency. Identify pests and select treatment suitable for the plant and location.
PLANTS A–Z
Get to know Hoya · wax plants
Hoya includes climbing and trailing species. Carnosa, bella and linearis do not have identical watering needs. Identify your plant and inspect its root zone.
View the plant profile
PRACTICAL ADVICE
Twelve Hoya species at a glance
From carnosa to caudata: positioning, watering needs and distinctive features in our PDF guide.
Download the PDF guide (German)
Quality products
Horticultural expertise
Our own production
Made in GermanyGREEN24's own products
Quick answers before you buy (FAQ)
Is this fertiliser suitable for my plant?
Hoya includes climbing and trailing species. Carnosa, bella and linearis do not have identical watering needs. Identify your plant and inspect its root zone.
How do I dilute the concentrate?
Dilution: 5 ml per 1.5 l 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
- 1 litre: 300 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.
- 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 explains safe mixing and use. Follow the hoya product’s own dilution and application limits.
Storage
Storage & product quality
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.
Store in a dry, dark place above 8 °C and at no more than 38 °C. Keep out of reach of children and animals.
Follow disposal instructions on the product and in the original leaflet.
Measure concentrate accurately and apply only after dilution. More fertiliser does not compensate for insufficient light, drought or damaged roots.