The product base
NPK 13-7-18 + 1.5% MgO + 20.7% SO₃ and trace elements in a controlled-release fertiliser.
Osmocote Bloom (2-3M) 500gr
Normal price
€4,50
Controlled-release fertiliser for flowering plants
Osmocote Bloom (2–3M) 500 g
For bedding plants and small flowering pots, good nutrition should support flowering without encouraging overly soft, loose growth. Osmocote Bloom uses an NPK 13-7-18 high-potassium formulation with magnesium, sulphur and trace elements, designed for short cycles of roughly six weeks to three months. Mixed evenly into the growing medium before planting, it provides a steady nutritional base for 2–3 months at 21°C — ideal for balcony pots, small flowering containers and seasonal displays that need to stay compact and well presented.
13–7–18NPK · % w/w
2–3 monthsNominal longevity · 21°C
Higher KFor flowering & compact growth
500 gFor short crop cycles
Composition & analysis
Higher potassium for flowering plants
The 13-7-18 analysis combines NPK, magnesium, sulphur and a complete trace-element package.
- Nitrogen forms: Total N 13.0% · nitrate 5.2% · ammoniacal 6.9% · urea-formaldehyde 0.9%.
- Phosphorus & potassium: P₂O₅ 7.0% (5.0% water-soluble) · K₂O 18.0% (18.0% water-soluble).
- Magnesium & sulphur: MgO 1.5% (1.0% water-soluble) · SO₃ 20.7%.
- Trace elements: B 0.018% · Cu 0.052% · Fe 0.35% · Mn 0.05% · Mo 0.017% · Zn 0.021%.
Designed for flowering plants
The higher-potassium balance suits bedding plants and small flowering pots.
Compact presentation
Supports controlled growth so seasonal displays retain a tidier form.
A 2–3 month cycle
Well matched to short crops and fast seasonal changeovers.
For short flowering cycles
Intended primarily for incorporation into growing media before planting.
Bedding plants
For crops lasting roughly six weeks to three months.
Balcony pots
For small flowering displays with controlled growth.
Small flowering pots
For even base nutrition from the start of the cycle.
Seasonal refresh
When replacing plants and growing medium for the next flowering display.
Three rate levels to match plant demand
Official rates are based on unfertilised growing medium and even incorporation.
- 1.5–4.5 g/L
- Mix before planting
- Do not dibble
- 2–3M at 21°C
1.5–2 g/L for plants with lower nutrient demand.
2–3 g/L for most standard flowering applications.
3–4.5 g/L for more demanding flowering plants.
At the normal rate of 2–3 g/L, mix a total of 6–9 g.
Incorporate into the medium — do not dibble
Mix it evenly through fresh growing medium before planting. Concentrated dibbling is not recommended. Rates are based on unfertilised medium; if a starter fertiliser is present, it should not exceed 0.5 kg/m³ and total nutrition must be recalculated.
Available packs
500 g
500 g pack for accurate dosing in small flowering pots and seasonal plantings.
Form
Coated CRF granules
Higher-potassium formulation for incorporation into flowering-plant growing media.
Storage
Store in dry conditions, preferably not above 21°C, and seal the pack carefully.
Technical details
The flowering formulation at a glance
Core analysis and longevity by average growing-medium temperature.
Total N13.0%
P₂O₅7.0%
K₂O18.0%
MgO1.5%
SO₃20.7%
16°C3–4 months
21°C2–3 months
26°C1.5–2 months
Need general feeding or an established-pot option?
Pro 3–4M is the general repotting option. Exact Tablets provide a pre-measured dose for pots that are already planted.
Frequently asked questions
Answers on flowering plants, dosage, application and longevity.
01Which plants is it designed for?
For bedding plants, balcony pots and small flowering plants with a short cycle.
02How much should I use?
Use 1.5–2 g/L for light, 2–3 g/L for normal and 3–4.5 g/L for high feeding.
03Is it applied on the surface?
The official application is primarily even incorporation into growing media before planting.
04How long does it last?
It lasts 3–4 months at 16°C, 2–3 months at 21°C and 1.5–2 months at 26°C.
05Why is potassium higher?
The 13-7-18 balance is tailored to flowering plants and compact growth.
06How should it be stored?
Keep it dry, preferably at no more than 21°C, and seal the pack carefully.