This store requires javascript to be enabled for some features to work correctly.

HOME

PLANTS

Cacti&Succulents
Indoor Plants
- All Plants
- Philodendron
- Calathea
- Sansevieria
- Peperomia
- Hoya
- Ferns
- Carnivorous Plants
Outdoor Plants
- All
- Shrubs
- Acer®
- Alstroemeria®
- Hydrangeas®
- Tropical Plants
- Fruit Snacks®
- Grasses®
- Climbing Plants
- Conifers
New varieties
Roses
Baby Plants
Mystery Box®

PLANT FINDER

SPECIAL COLLECTIONS

HYDROCULTURE

GARDENING

Pots and Planters

PLANT CARE

GIFT CARD

BLOG

Osmocote Pro (8-9M) 1KG

Name: Osmocote Pro (8-9M) 1KG
Brand: ICL
SKU: OsmocotePro8-9M1KG
Price: 7.9 EUR
Availability: InStock

€7,90

Quantity

Controlled-release granular fertiliser

Osmocote Pro (8–9M) 1 kg

When one repotting needs to support a long growing cycle, Osmocote Pro (8–9M) provides a clear, organised solution. Mix it once and evenly through fresh growing medium; its fully coated granules then release NPK, magnesium and trace elements gradually for 8–9 months at 21°C. It is a practical choice for ornamentals, actively growing houseplants, shrubs and small trees in containers when you want reliable base nutrition with fewer repeat applications.

18–9–10NPK · % w/w

8–9 monthsNominal longevity · 21°C

2nd generationFully coated granules

1 kgGranular CRF

Composition & analysis

Complete nutrition for a long feeding cycle

The 18-9-10 formulation combines three nitrogen forms, phosphorus, potassium, magnesium and trace elements.

18–9–10

The product base

NPK 18-9-10 + 2% MgO and a complete trace-element package in fully coated granules.

Nitrogen forms: Total N 18.0% · nitrate 5.9% · ammoniacal 7.7% · urea 4.4%.
Phosphorus & potassium: P₂O₅ 9.0% (6.8% water-soluble) · K₂O 10.0% (10.0% water-soluble).
Magnesium: MgO 2.0%, of which 1.3% is water-soluble.
Trace elements: B 0.017% · Cu 0.041% · Fe 0.33% · Mn 0.046% · Mo 0.016% · Zn 0.02%.

Long-lasting nutrition

One correctly calculated repotting dose supports a substantial part of the growing cycle.

Complete base in every granule

NPK, magnesium and trace elements are distributed evenly through the growing medium.

Fewer repeat applications

Ideal for plants with a long active cycle when you want a simpler feeding routine.

When to use it

For plants growing actively for months

Incorporate it into fresh growing medium before planting or repotting.

Repotting into a new pot

For even base nutrition from the start of the new cycle.

Houseplants

For actively growing plants, at a rate matched to their needs.

Shrubs & small trees

For containers that need a longer feeding period.

Long-cycle ornamentals

When the growing cycle is longer than a 3–4 month fertiliser programme.

Dosage & application

Calculate the rate per litre of growing medium

Rates are based on unfertilised growing medium and should be adjusted for plant demand and climate.

Mix before planting
3–6 g/L
8–9M at 21°C
Reduce with supplementary feeding

01Container shrubs & trees

3–3.5 g/L low · 3.5–4.5 g/L normal · 4.5–5.5 g/L high demand.

02Potted ornamentals

3–4 g/L low · 4–5 g/L normal · 5–6 g/L high demand.

033 L pot example

For normal demand at 4–5 g/L, mix a total of 12–15 g.

04Temperature & longevity

16°C: 10–11M · 21°C: 8–9M · 26°C: 6–7M.

Incorporate evenly into fresh growing medium

Do not concentrate it in the planting hole or use it as a surface application. If water-soluble feed is added, reduce the Osmocote Pro rate accordingly. For houseplants, assess longevity from growing-medium temperature and actual growth rate.

Available packs

1 kg

1 kg pack for accurate measurement in g/L of pot volume.

Form

Fully coated granules

Second-generation granular fertiliser for even incorporation.

Storage

Seal partly used packs carefully and store in dry conditions.

Technical details

Long-cycle nutrition at a glance

Core analysis, trace elements and longevity by average growing-medium temperature.

Total N18.0%

P₂O₅9.0%

K₂O10.0%

MgO2.0%

16°C10–11 months

21°C8–9 months

26°C6–7 months

ApplicationIncorporation

Frequently asked questions

Answers on application, rates, longevity and combined feeding.

01How does it differ from Pro 3–4M?

Its nominal longevity is longer: 8–9 months at 21°C instead of 3–4 months.

02How much should I use?

For potted plants, official rates are 3–4 g/L for low, 4–5 g/L for normal and 5–6 g/L for high demand.

03Can I apply it on the surface?

Not as a standard topdress. Mix it evenly into fresh growing medium before planting.

04How long does it last in warmer conditions?

At 26°C, indicative longevity falls to 6–7 months.

05Can it be combined with liquid feed?

Yes, but the Osmocote Pro rate needs to be reduced accordingly.

06How should it be stored?

Keep it dry and seal the pack carefully after each use.

Cart (0)

Osmocote Pro (8-9M) 1KG

Osmocote Pro (8-9M) 1KG

Osmocote Pro (8–9M) 1 kg