---
product_id: 84364243
title: "– A1 Lawn, Ultimate Autumn Winter Lawn Fertiliser - Hardens Turf & Boosts Root Strength, High Potassium 6-5-10 NPK, DEFRA Certified, 10kg"
brand: "a1lawn"
price: "A$298"
currency: AUD
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.au/products/84364243-a1-lawn-ultimate-autumn-winter-lawn-fertiliser-hardens-turf-boosts
store_origin: AU
region: Australia
---

# High potassium 10% for strong, hardy grass Balanced NPK 6-5-10 for lush growth Optimized for Autumn/Winter resilience – A1 Lawn, Ultimate Autumn Winter Lawn Fertiliser - Hardens Turf & Boosts Root Strength, High Potassium 6-5-10 NPK, DEFRA Certified, 10kg

**Brand:** a1lawn
**Price:** A$298
**Availability:** ✅ In Stock

## Summary

> ❄️ Feed your lawn like a pro, even when the cold bites!

## Quick Answers

- **What is this?** – A1 Lawn, Ultimate Autumn Winter Lawn Fertiliser - Hardens Turf & Boosts Root Strength, High Potassium 6-5-10 NPK, DEFRA Certified, 10kg by a1lawn
- **How much does it cost?** A$298 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/84364243-a1-lawn-ultimate-autumn-winter-lawn-fertiliser-hardens-turf-boosts)

## Best For

- a1lawn enthusiasts

## Why This Product

- Trusted a1lawn brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Root Revival:** Phosphorus-rich formula promotes deep, healthy root development for lasting strength.
- • **Potassium Boost:** 10% potassium content fortifies grass against winter stress and wear.
- • **Seasonal Powerhouse:** Specifically formulated to keep your lawn vibrant through the toughest cold months.
- • **UK Climate Certified:** Freshly produced and rigorously tested to thrive in British weather conditions.
- • **Professional Grade Assurance:** DEFRA, FERA & SASA approved with a decade of trusted quality and customer satisfaction.

## Overview

A1 Lawn Ultimate Autumn Winter Lawn Fertiliser is a premium 10kg granular feed designed for UK lawns during colder months. With a balanced NPK ratio of 6-5-10, it delivers high potassium for durability, phosphorus for root health, and nitrogen for vibrant green growth. Certified by DEFRA, FERA & SASA, this professional-grade fertiliser ensures your lawn stays lush, strong, and ready to thrive year-round.

## Description

A1 Lawn Ultimate Autumn Winter Lawn Fertiliser, 10kg (280m2) - [6-5-10] Potassium Rich Feed with Nitrogen & Phosphorous - DEFRA, FERA & SASA Approved - Encourage Growth of Roots & Strong Grass

## Features

- AUTUMN / WINTER LAWN TREATMENT – Our in season ultimate fertiliser feeds your grass with all the nutrients to keep it lush & healthy throughout the tougher colder months. We only use specific premium homogeneous granular products & is rigorously tested to guarantee the highest quality. Easy application, no mixing.
- POTASSIUM RICH GRASS FERTILISER – The high potassium content (NPK 6-5-10) of our lawn feed will keep your grass strong, hardy & more durable during Autumn & Winter. The Phosphorus aids healthy grass roots & shoots whilst the Nitrogen gives a greener blade growth, to give you an all year round great looking lawn.
- BEST FOR THE UK CLIMATE – A1 Lawn ultimate fertilisers are freshly produced in the UK, professional grade & designed to work with the British weather. This ensures fast germination & delivers a strong & healthy lawn every year. Use September, October & November or until grass stops growing. Apply when showers are predicted or water in well.
- PROFESSIONAL GRADE - Based in Peterborough, A1 Lawn has been delivering high quality certified grass & fertiliser direct to hundreds of thousands of satisfied domestic, professional and trade customers across the UK since 2010. If for whatever reason you are not entirely satisfied, simply contact us and we will endeavour to make it right. Certified by DEFRA, FERA & SASA.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 55 x 42 x 30 cm; 10 kg |
| Part number | NQ-EOJT-RTR5 |
| Item display weight | 10 kg |
| Material type | Iron 6%, Nitrogen 6%, Phosphorous 5%, Potassium 10% |
| Seasons | Autumn, Winter |
| Expected blooming period | Year Round |
| Moisture needs | Medium |
| Sunlight exposure | Full Sun |
| Ingredients | Fertiliser |
| Soil type | All |
| Item volume | 46200 Cubic Centimetres |
| Manufacturer | A1LAWN |
| Item model number | NQ-EOJT-RTR5 |
| ASIN | B00MV0XMJI |

## Product Details

- **Brand:** A1Lawn
- **Item weight:** 10 Kilograms
- **Item form:** Granules
- **Specific uses for product:** Lawn Maintenance
- **Manufacturer:** A1LAWN

## Images

![– A1 Lawn, Ultimate Autumn Winter Lawn Fertiliser - Hardens Turf & Boosts Root Strength, High Potassium 6-5-10 NPK, DEFRA Certified, 10kg - Image 1](https://m.media-amazon.com/images/I/711E1Dql7dL.jpg)

## Questions & Answers

**Q: What setting on a Scott drop spreader for A1 ultimate autumn winter fertilizer**
A: Hello,

If you are referring to the "Scotts Evengreen Drop Spreader" then the setting should be around number 6.
This is a guideline only, if in doubt contact the manufacturer or start on a lower setting to be safe.

Many thanks 

A1Lawn

**Q: For pre seeding in november (now) should i use this or the other 'a1 pre seed'? thanks**
A: I believe this is for use on established turf only. My turf (not seed) was laid at the end of February.     I was recommended to use an autumn feed around October. I chose this product as it seemed straightforward and easy to use. I have not been disappointed in the results.

**Q: When can you use on newly seeded lawns?**
A: We would suggest using it from around 4 weeks post germination.

**Q: is this product child and animal  recommended ?**
A: Hello,

This product is safe for pets and children one the granules are fully dissolved.
Normally this will occur around 48hours after application with plenty of rainfall/water in that time.

Many thanks

A1Lawn

## Customer Reviews

### ⭐⭐⭐⭐⭐ Brilliant product
*by N***L on 7 September 2025*

Brilliant for grass, greens grass, kills moss , we use this once a year for lush green seed free lawnsEasy to apply

### ⭐⭐⭐⭐⭐ Effective
*by J***B on 30 May 2025*

Effective autumn feed helps your lawn through the winter. Easy to apply and good value for money.

### ⭐⭐⭐⭐ Easy to apply
*by P***N on 11 November 2024*

This easy to apply autumn lawn fertiliser appears to be working very well after one month, with the grass certainly a lot greener, although not sure on how well it’s handling the moss. I scarified the lawn prior to application and the moss left just looks the same as it did a month ago?

## Frequently Bought Together

- A1 Lawn Ultimate Autumn Winter Lawn Fertiliser, 10kg (280m2) - [6-5-10] Potassium Rich Feed with Nitrogen & Phosphorous - DEFRA, FERA & SASA Approved - Encourage Growth of Roots & Strong Grass
- Crystals® Grass and Lawn Seed Spreader, Lawn Feed, Fertiliser Spreader, Large Wheels and Adjustable Setting, H 108cm x W 56cm x D 18cm, Weight: 1.85kg
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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-12*