Water-soluble & available
All nutrients are water-soluble. In the fully diluted mixture, they are available for feeding through roots and leaves.
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- NPK concentrate with 0.10 % iron for conifers
- For root and foliar feeding
- Product-specific dilution calculator
Feed conifers. Understand their differences.
FE Pro supplies nutrients and iron to growing conifers such as firs, spruces and cypresses. Dilute the liquid concentrate before application. Identify the plant and consider root health and watering as part of a targeted care routine.
- Declared NPK
- 9.0 + 3.5 + 5.2With 0.10 % iron.
- Base dilution
- 5 ml per 1.5 litres of waterEvery 3–4 weeks during active growth. Application period: April–August.
- Application
- Roots & foliageDilute before application.
- Application period
- April–AugustConsider growth and need.
Product information
Application & dosageMix and apply to suit the growth stage.
Application in one place
Measure. Mix. Apply.
Dilution calculator for conifers
5 ml per 1.5 litres of water
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 conifer only. Measure height from soil level and the full leafy crown width, not individual needles or trunk circumference. For a hedge, enter the actual water volume. Check moisture, soil, roots and weather; do not force the suggested volume. This is not a foliar spray volume.
How the guide is calculated
Concentrate (ml) = water (l) × 5 ÷ 1.5.
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 or measure one conifer. For hedges, calculate from the actual water volume. 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 1.5 litres of water. Every 3–4 weeks during active growth. Application period: April–August.
Watering · through the roots
Pre-moisten the root ball and distribute the solution through the absorbing root zone. Do not water only immediately beside the trunk. Ensure drainage in containers; address the cause of waterlogging or drought-damaged roots first.
Spray · onto needles or scale leaves
Finely wet needles or scale leaves in the morning, evening or under overcast skies, avoiding open flowers. Foliar feeding belongs to the same nutrition plan as root feeding. A different leaf shape does not justify a higher spray concentration.
Characteristics & pack sizesThe concentrate and pack sizes at a glance.
Net mass: 287 g per 250 ml. The twin pack contains two 250 ml bottles.
At the base dilution, 250 ml makes 75 litres of nutrient solution; the twin pack makes 150 litres.
| Pack size | Price | Yield at label dilution |
|---|---|---|
| 250 ml | 10.95 € Unit price ( 43.80 €/ l) | 75.0 l |
| 500 ml – twin pack (2 × 250 ml) | 18.95 € Unit price ( 37.90 €/ l) | 150.0 l |
Yield at the labelled standard dilution; account for pack size and existing nutrients.
For your conifers
For conifers
For conifers with needles or scale leaves. Genus and cultivar determine the further growing plan; Ginkgo and indoor Norfolk Island pines are not included under a single shared care description.
With iron
During active growth, normally April–August. Account for soil nutrients, fresh compost and previous applications.
Growth and need
Fresh compost may already contain fertiliser. After planting or repotting, account for its initial nutrients and root condition when planning further feeding.
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.
Feed with plant tolerance in mind
Follow the complete original pack declaration and storage instructions.
Understand leaf function and growth
Nitrogen is needed to build chlorophyll and proteins, phosphorus for energy transfer, and potassium for water regulation and transport. These functions concern needles and scale leaves as well as growing roots and shoots. Well-maintained foliage does not mean a promised colour; blue, golden and deciduous cultivar characteristics still matter.
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. Product pH: 6.8.
- 9.0 % total nitrogen (N), including 0.1 % nitrate nitrogen and 8.9 % urea nitrogen
- 3.5 % water-soluble phosphate (P₂O₅)
- 5.2 % water-soluble potassium oxide (K₂O)
- 0.0032 % water-soluble copper (Cu), EDTA chelate
- 0.10 % water-soluble iron (Fe), EDTA chelate
- 0.0032 % water-soluble zinc (Zn), EDTA chelate
- Additional trace nutrients: 0.0080 % boron (B), 0.0096 % manganese (Mn) as EDTA chelate, 0.0008 % molybdenum (Mo)
GREEN24 · Plant knowledge
Needles. Scale leaves. Different growth habits.
Pines carry needles, while thuja usually has closely overlapping scale leaves. Cushion forms, columns and large trees need different amounts of space. Many conifers are evergreen; larch, dawn redwood and bald cypress shed their foliage in autumn.
Needles are leaves
Pine needles occur in bundles whose number varies by species; larches carry softer needles and are deciduous. Old inner needles can change colour during normal foliage renewal. Dying shoot tips or larger brown patches need a separate assessment.
Scale leaves form dense sprays
Thuja and many members of the cypress family have small, overlapping scale leaves. Green outer shoots need light. Do not routinely cut into old bare wood; the ability to regenerate differs between genera.
New shoots and natural habit
New shoots extend the leafy crown. Dwarf pines, columnar thuja and large larches grow at different rates and widths. Natural habit is not a reason to increase fertiliser concentration.
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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.
How do conifers use nutrients?
Roots · absorb and anchorAbsorbing roots access soil water and dissolved nutrients.
Moisture and oxygen must both be available around the roots. Soil requirements differ between conifer species. Mycorrhizal fungi help many conifers interact with the soil; the ectomycorrhiza common in pines is not one uniform model for every conifer genus.
Woody framework · support & conductThe trunk and branches support the crown and connect roots, foliage and shoots.
Xylem carries water and dissolved substances upwards. Sugars from green foliage move through other conducting tissue to growing or storage tissues. A leading shoot is part of many upright forms; routine topping is not a necessary feeding or care measure.
Needles & scale leaves · use lightNarrow needles and small scale leaves also carry out photosynthesis.
Nitrogen is part of chlorophyll and proteins; iron and manganese have further metabolic roles. Leaf shape and protective surfaces differ between genera. Bluish or golden cultivar colour and normal foliage renewal are not automatically signs of deficiency.
Young shoots · continue growthNew shoots extend the leafy crown according to species and cultivar.
New cells require nutrients and sugars made by the plant. Phosphorus contributes to energy transfer. Growth rate and regeneration also depend on the genus: yews can reshoot from older wood, while many thuja and cypresses do not reliably regrow from bare old sections.
How nutrients enter your conifer
Select a point in the picture or choose a stage.
Stage 01 / 04
The solution reaches the root zone
Apply the finished dilution to the pre-moistened root zone. Soil water brings dissolved nutrients into contact with absorbing root surfaces.
Good to knowCheck soil moisture and drainage before feeding; brown needles alone do not establish a need.
A closer look
Apply the finished dilution to the pre-moistened root zone. Soil water brings dissolved nutrients into contact with absorbing root surfaces. Check soil moisture and drainage before feeding; brown needles alone do not establish a need.
Stage 02 / 04
Uptake at living root regions
Absorbing fine roots are in contact with the soil. In many conifers, mycorrhizal fungi extend the soil volume explored. This does not replace regulated entry into living plant cells.
Good to knowPine mycorrhiza is one example, not a uniform fine-root structure for all conifers.
A closer look
Absorbing fine roots are in contact with the soil. In many conifers, mycorrhizal fungi extend the soil volume explored. This does not replace regulated entry into living plant cells. Pine mycorrhiza is one example, not a uniform fine-root structure for all conifers.
Stage 03 / 04
Root cells regulate entry
Membranes and transport proteins regulate uptake of dissolved nutrients. This differs from the movement of water alone. Healthy, oxygenated roots remain essential.
Good to knowDo not try to correct waterlogging or damaged roots with more concentrate.
A closer look
Membranes and transport proteins regulate uptake of dissolved nutrients. This differs from the movement of water alone. Healthy, oxygenated roots remain essential. Do not try to correct waterlogging or damaged roots with more concentrate.
Stage 04 / 04
Through the wood towards the foliage
Xylem can carry water and absorbed nutrients towards needles, scale leaves and shoots. Transport and use also depend on growth stage and root function.
Good to knowThe slower growth of a dwarf conifer is not a reason to feed more strongly.
A closer look
Xylem can carry water and absorbed nutrients towards needles, scale leaves and shoots. Transport and use also depend on growth stage and root function. The slower growth of a dwarf conifer is not a reason to feed more strongly.
Stage 01 / 04
The solution wets needles or scale leaves
Distribute the finished dilution finely over green foliage. Follow the specified temperature and light conditions.
Good to knowPlan root and foliar applications together rather than automatically feeding twice.
A closer look
Distribute the finished dilution finely over green foliage. Follow the specified temperature and light conditions. Plan root and foliar applications together rather than automatically feeding twice.
Stage 02 / 04
Across the protective leaf surface
Needles and scale leaves have protective surfaces. Dissolved nutrients can cross them; species, leaf age and conditions influence the amount taken up.
Good to knowDifferent leaf shapes do not justify a higher spray concentration.
A closer look
Needles and scale leaves have protective surfaces. Dissolved nutrients can cross them; species, leaf age and conditions influence the amount taken up. Different leaf shapes do not justify a higher spray concentration.
Stage 03 / 04
Use within living foliage cells
After crossing the surface, leaf cells can take up nutrients and use them in metabolism. Nitrogen, phosphorus and potassium have different roles. A visible drop does not itself prove uptake.
Good to knowCultivar colour and natural shedding of old needles must still be distinguished from deficiency.
A closer look
After crossing the surface, leaf cells can take up nutrients and use them in metabolism. Nitrogen, phosphorus and potassium have different roles. A visible drop does not itself prove uptake. Cultivar colour and natural shedding of old needles must still be distinguished from deficiency.
Stage 04 / 04
Use and possible redistribution
Redistribution from foliage depends on the nutrient and plant condition. Not every nutrient reaches other organs to the same extent. This does not establish immediate feeding of the entire conifer.
Good to knowBrown old sections do not regrow simply because a foliar feed is applied.
A closer look
Redistribution from foliage depends on the nutrient and plant condition. Not every nutrient reaches other organs to the same extent. This does not establish immediate feeding of the entire conifer. Brown old sections do not regrow simply because a foliar feed is applied.
Development influences requirements
Distinguish establishment, new growth and rest
Establishment & young conifers
Consider establishment, root condition and starter nutrients first. Additional calculator stages follow the confirmed GREEN24 application instruction; they do not increase the stated yield.
Needle, scale-leaf and shoot development
Feed at the specified interval during active growth. Dwarf forms naturally grow more slowly than tree-sized conifers. Do not try to change their growth habit through extra or more concentrated applications.
Resting period · with or without green foliage
Green winter foliage does not automatically mean active growth. Do not fertilise during rest, but check root-ball moisture in frost-free weather. Autumn foliage loss is normal in larch, dawn redwood and bald cypress.
Genus, cultivar and foliage age help interpretation. Compare normal inner foliage renewal with new damage to outer shoots. Seasonal changes do not establish an additional dilution setting.
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.
Specimen, hedge or container?
Container · account for limited root space
Use a pot suited to the plant’s habit with open drainage holes. Check root-ball moisture regularly without keeping every conifer equally wet. Account for initial nutrients and planting depth when repotting; fertiliser concentration remains unchanged.
Garden · match species and soil
Choose light, soil moisture and future space according to species: pines generally prefer sun, while yews tolerate shade. Maintain the original planting depth. Established conifers in adequately supplied soil do not automatically need regular supplementary feeding.
Winter · consider site and origin
Hardiness is not uniform across the group. Hardy outdoor species stay outside; more tender Mediterranean cypresses need protection suited to the region. Protect container roots from severe freezing and do not leave evergreen foliage over a dry root ball. Norfolk Island pines need their own indoor care plan.
Hedge · retain the green outer growth
For suitable hedge forms, a narrower top helps light reach the lower branches. Do not cut thuja and many cypresses deeply into bare old wood. Yews are an important exception in their ability to regenerate. Check for occupied bird nests before clipping.
What is changing on your conifer?
Needle renewal or stress?
Older inner needles are naturally replaced. Large brown patches and wilting shoot tips instead call for a check of soil moisture, drying winds, frost and previous pruning.
Conifer aphids
Inspect shoots for aphids, sticky honeydew and dark sooty mould. Green spruce aphid can damage older spruce needles, especially after mild winters; identify both plant and pest.
Scale insects on scale foliage
Check junipers, cypresses and arborvitae for small attached pale or brown scales. Not every deposit signals a severe infestation; juniper scale does not produce honeydew.
Damaged roots
If a plant fades and browns despite wet soil, inspect drainage and roots. Waterlogging and root diseases such as Phytophthora can look alike; reliable identification may require specialist diagnosis.
Advice for your conifer
These details help distinguish normal foliage renewal, site problems and possible pests:
- Photos of the whole plant or hedge section, damaged and healthy shoots for comparison, needles or scale leaves, and the base of the trunk.
- Genus and cultivar, planting date, specimen or hedge, pot or garden, soil, light, wind and whether neighbouring plants are affected.
- Onset and spread, soil moisture, recent drought or frost, timing and depth of pruning, and previous fertiliser and care products.
Individual yellow or brown needles do not establish a deficiency. Check roots and soil when larger sections fail; identify aphids or scale insects before treatment. The mixing partners below are not automatically authorised for every conifer species or problem.
PLANTS A–Z
Conifer Fertiliser FE Pro 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 do I dilute FE Pro?
5 ml per 1.5 litres of water. Every 3–4 weeks during active growth. Application period: April–August.
How much solution does a bottle make?
At the base dilution, 250 ml concentrate makes 75 litres of nutrient solution. The twin pack makes 150 litres.
How do I feed young plants?
Under the GREEN24 dosing standard, young plants receive 50 % and seedlings with leaves 20 % of the base dilution; Normal is 100 %.
Does more iron always resolve brown needles?
No. Check root condition, watering and position first. Appearance alone justifies neither a deficiency diagnosis nor a higher dose.
Can I spray the foliage?
Root and foliar feeding use the same dilution. Do not apply in direct sunlight, below 5 °C or above 30 °C; avoid open flowers. Count other fertiliser applications as well.
When should I feed after repotting?
Account for the compost’s initial fertiliser. For the linked Tree & Shrub Compost, check nutrient levels after about 4–6 weeks and feed if needed.
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.
- Prefer low-lime water or rainwater at 15–25 °C.
- Do not fertilise in direct sunlight, below 5 °C or above 30 °C.
- Apply to the pre-moistened root zone or spray the foliage. Do not spray open flowers.
- Wear protective clothing, rubber gloves and safety goggles when mixing and applying. Use clean, chemically suitable tools and containers.
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 and dark · above 8 °C to a maximum of 38 °C Store dry and dark 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 and dark · above 8 °C to a maximum of 38 °C Store dry and dark 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
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