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Agrigem Specialist Amenity Products and Services

Phos-Mag 8-19-10+5Mg Fertiliser 25kg

Phos-Mag 8-19-10+5Mg Fertiliser 25kg
£33.00 Inc VAT £27.50 Ex VAT
  • Buy 5 for £27.00 (£32.40 incl. tax) each and save 2%
  • Buy 10 for £26.50 (£31.80 incl. tax) each and save 4%
  • Buy 20 for £26.00 (£31.20 incl. tax) each and save 6%
  • Buy 40 for £25.50 (£30.60 incl. tax) each and save 8%

Availability: In stock

Promote Growth On Trees

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Key Information

Additional Information

Active Ingredient8% nitrogen, 19% phosphate, 10% potassium, 5% magnesium
LERAP CategoryDoes Not Apply
Pack Size25kg
Pack Size Coverage500m2
Granule Size2-5mm (Maxi)
Spreading Rate50g per m2
Application Method(s)Spread by Hand, Spreader
Area of UseAmenity Turf, Horticulture, Paddock, Pasture, Plants, Trees & Ornamentals
Safe For Use OnConifer Safe, Grass, Paddocks, Pasture, Safe Around Fruit Trees, Safe Around Shrubs, Safe Around Trees
Period Of UseAll Year Round


Phos Mag fertiliser is a quality mix of NPK specifically designed to promote growth on trees, hedges & woody perennial plants. This mini-granular blend fertiliser offers an excellent spreading pattern which will release over a 6 week period. Phos Mag can be applied at any time of year providing the tree or plant is actively growing. While this fertiliser is most often used on trees and shrubs, it can also be used on areas suffering from a deficiency in phosphorus or magnesium.

The application rate will depend on how many times you intend to apply the product. If you require a detailed recommendation then please contact us.


Understanding Fertiliser Analysis: 

- Under the metric system the unit of measurement is a kg

- Recommendations are given in kg/ha

- A fertiliser with the analysis 8:19:10 contains: 8% nitrogen, 19% phosphate, 10% potassium, 5% magnesium.

- So in a 25kg bag: 8% of the 25kg is Nitrogen i.e. 1.25kg N, 19%of the 25kg is Phosphate i.e. 4.75kg P, 10% of the 25kg is Potassium i.e. 2.5kg K, 5% of the 25kg is Magnesium i.e 1.25kg Mg.

- For more information on Fertiliser rates visit


Key Benefits: 

- Can be used all year round.

- Ideal for hedges, shrubs, trees and woody perennial plants.

- Can be used to treat plants with phosphate and/or magnesium deficiencies.


Our Recommendation:

- Always read the product label before use.

- If you are looking for an all around liquid fertiliser look at Nutri-gem Liquid.

- For applying fertiliser over large areas look at our Pro Fertiliser Spreader.

- If you require a tonic to aid stressed plants, look at Hort-booster.

- Improve the pH of your soil by applying Granulated Lime.

- Find out what nutrients you may need in your area by using our Soil Analysis kit.


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Calculator Disclaimer This is guide only, For crop specific rates please check the product label.

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