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

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  • Regular price £40.02
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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.