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10 Best Organic Lawn Fertilizers 2025 in the UK

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Our Top Picks

#1

Winner

Miracle-Gro EverGreen Fast Green Spray & Feed, Liquid Lawn Food, 1 Litre

Rating
9.9
Chosen by1,475
Application Method
Soil Health Benefits
Application Method
Attaches directly to a hose for effortless application, allowing you to water and feed your lawn simultaneously.
Soil Health Benefits
Delivers a noticeable improvement in lawn color and health within days, providing almost instant greening.

Miracle-Gro EverGreen Fast Green Spray & Feed is a liquid lawn fertilizer designed to quickly green your lawn within 24 hours under normal conditions. It’s very convenient to use because it attaches directly to a hose, allowing you to water and feed your lawn at the same time, covering up to 100 square meters with just 1 litre. This makes it a good option for those who want fast results and easy application without mixing powders or granules.

This product is a synthetic liquid feed, which may not provide long-term soil health benefits like organic fertilizers that improve soil quality over time. Synthetic fertilizers can sometimes contribute to runoff and pollution if overused. If you want a quick green-up for your lawn and ease of use, this product is helpful. However, if your priority is organic gardening or improving soil health naturally, you might want to consider other options that clearly state their organic ingredients and soil benefits.

Rating
9.9
Chosen by1,475
Application Method
Soil Health Benefits
Application Method
Attaches directly to a hose for effortless application, allowing you to water and feed your lawn simultaneously.
Soil Health Benefits
Delivers a noticeable improvement in lawn color and health within days, providing almost instant greening.
#3

Dark Green Lawn Fertiliser - Non Toxic - High in Nitrogen Greens Grass Fast - Feeds for 90 Days - Child and Pet Friendly - Garden Lawncare Guy

Rating
9.7
Application Method
Soil Health Benefits
Application Method
Easy application with great results; lawns look more lush and greener than ever.
Soil Health Benefits
Within weeks, the grass became thicker and more uniform in color, showing visible improvement even on new turf.

The Dark Green Lawn Fertiliser by Garden Lawncare Guy is designed to quickly make your lawn thicker and greener, thanks to its high nitrogen content. It contains an N-P-K ratio that includes potassium, phosphorus, as well as calcium and magnesium, all beneficial for lush grass growth. One of its standout features is that it's safe for use in gardens where children and pets play, as it does not require toxic warning labels and is designed to be safe when applied as directed.

The fertiliser also offers a combination of fast and slow-release granules, ensuring that your lawn gets an immediate nitrogen boost while continuing to feed for up to 90 days. This extended feeding period is particularly helpful for maintaining a healthy lawn with less frequent applications. Another advantage is that it does not leave unsightly brown stains on hard surfaces, making it a cleaner option for lawns near patios or decking.

Manufactured in the UK, it targets grass greening, root development, and plant growth and covers a significant area (70-100m²) with its 2.55 kg weight. The Dark Green Lawn Fertiliser is a strong option for anyone looking to quickly and safely improve their lawn's appearance and health with minimal maintenance.

Rating
9.7
Application Method
Soil Health Benefits
Application Method
Easy application with great results; lawns look more lush and greener than ever.
Soil Health Benefits
Within weeks, the grass became thicker and more uniform in color, showing visible improvement even on new turf.

Buying Guide for the Best Organic Lawn Fertilizers

Choosing the right organic lawn fertilizer is crucial for maintaining a healthy and vibrant lawn without harming the environment. Organic fertilizers are derived from natural sources and are designed to improve soil health and provide essential nutrients to your grass. When selecting an organic lawn fertilizer, it's important to consider the specific needs of your lawn, such as the type of grass, soil condition, and climate. Understanding the key specifications of organic fertilizers will help you make an informed decision that aligns with your lawn care goals.
N-P-K RatioThe N-P-K ratio represents the percentage of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer. These are the primary nutrients that plants need to grow. Nitrogen promotes lush, green growth; phosphorus supports root development; and potassium enhances overall plant health. The ratio is important because it helps you understand what your lawn needs. For example, a high nitrogen ratio is ideal for promoting green growth, while a balanced ratio is better for overall health. Choose a ratio based on your lawn's current condition and growth goals.
Source of NutrientsOrganic fertilizers can be made from various natural sources such as compost, manure, bone meal, or seaweed. The source of nutrients affects how quickly they are released into the soil and how they benefit your lawn. For instance, compost and manure release nutrients slowly, providing a steady supply over time, while seaweed can offer a quick boost. Consider the nutrient source based on how quickly you want to see results and the long-term health of your soil.
Application MethodOrganic fertilizers come in different forms, such as granules, liquids, or powders, each with its own application method. Granular fertilizers are easy to spread and provide a slow release of nutrients, making them ideal for long-term feeding. Liquid fertilizers are absorbed quickly and are great for a fast nutrient boost. Powders can be mixed with water for a customized application. Choose the application method that fits your lawn care routine and the specific needs of your grass.
Soil Health BenefitsOne of the advantages of organic fertilizers is their ability to improve soil health by increasing microbial activity and enhancing soil structure. This is important because healthy soil supports robust plant growth and resilience against pests and diseases. Look for fertilizers that specifically mention soil health benefits if you are aiming to improve the overall condition of your lawn's soil.
Environmental ImpactOrganic fertilizers are generally more environmentally friendly than synthetic options, but it's still important to consider their impact. Some organic fertilizers are made from renewable resources and have minimal processing, which reduces their carbon footprint. If environmental sustainability is a priority for you, look for fertilizers that are certified organic and have a low environmental impact.