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Phased Release 18-3.5-8 +1Mg Fertiliser 20kg

£41.00
Slow-release 18-3.5-8 fertiliser with magnesium. Feeds lawns and turf for up to 16 weeks, promoting steady growth, strong roots, and rich green colour.

Multi Buy Discount:

  • Buy 5 - 9 for 2.5% discount per unit
  • Buy 10 - 19 for 5% discount per unit
  • Buy 20 - 49 for 7% discount per unit
  • Buy 50 or above for 10% discount per unit
Standard Bagged Delivery 2-3 Days* Click here for Delivery Information >>
  • + Product Description

    Phased Release 18-3.5-8 +1Mg Fertiliser 20kg is a professional, organic-based lawn and turf fertiliser designed to deliver consistent, controlled nutrition over an extended period. Ideal for gardeners, landscapers, and groundskeepers, this high-performance fertiliser supports steady, healthy growth across lawns, paddocks, sports turf, and ornamental planting areas.

    With a balanced 18-3.5-8 NPK formulation plus 1% magnesium, this fertiliser provides essential nutrients for sustained turf performance. The high nitrogen content promotes strong leaf and shoot growth, while phosphate supports root development and potassium enhances plant strength and stress resistance. Added magnesium (Mg) boosts chlorophyll production, improving lawn colour and maximising nutrient uptake.

    Its advanced phased release technology (12–16 weeks) ensures nutrients are delivered gradually, reducing the risk of scorching and excessive growth flushes. The mini-granular (1–2.5mm) formulation allows for even application and efficient absorption, making it ideal for fine turf, high-quality lawns, and sensitive planting areas.

    Features & Benefits

    • Phased Release (12–16 Weeks) – Long-lasting, controlled nutrient delivery
    • High Nitrogen (18%) – Encourages steady, healthy grass growth
    • Balanced NPK + Magnesium – Supports roots, colour, and plant vitality
    • Mini-Granular (1–2.5mm) – Even spread and consistent coverage
    • Reduced Scorch Risk – Gentle feeding ideal for fine turf
    • Improves Turf Strength – Enhances resilience to stress and wear
    • Versatile Application – Suitable for lawns, paddocks, turf, and ornamentals

    Applications

    • Domestic and commercial lawns
    • Sports turf and playing fields
    • Paddocks and pasture grass
    • Trees and ornamental plants
    • Amenity and landscaped areas
    • Newly seeded or establishing grass

    Sizes

    • 20kg bag

    Application Rate

    • 50g per m²

    Coverage:

    • Up to 400m² per 20kg bag

    Technical Specification

    • Product Type: Phased Release Mini Granular Fertiliser
    • NPK: 18-3.5-8 +1Mg
    • Nitrogen (N): 18%
    • Phosphate (P₂O₅): 3.5%
    • Potassium (K₂O): 8%
    • Magnesium (Mg): 1%
    • Granule Size: 1–2.5mm
    • Pack Size: 20kg
    • Coverage: Up to 400m²
    • Application Method: Spreader or hand application
    • Nutrient Release: 12–16 weeks
    • Usage Period: Spring, summer, autumn
    • Suitable Areas: Lawns, sports turf, paddocks, ornamentals
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