Best Nitrogen Lawn Fertilisers of 2025

The Elixir Gardens Liquid Fertiliser is an excellent choice for both amateur and professional gardeners. This versatile fertiliser is ideal for feeding vegetables, ensuring that your exhibition carrots, celery, and pumpkins grow strong and healthy. It's also perfect for enhancing the blooms of chrysanthemums and other flowers, giving your garden vibrant colours. For roses, trees, and shrubs, using this fertiliser after dormancy will promote early growth, helping your plants thrive. Additionally, it supports new plantings, making it suitable for conifers, heathers, and bonsai during their first year.

The Garden Lawncare Guy Fertiliser is a fast-acting solution designed to green up your lawn quickly. Packed with essential nutrients like nitrogen, potassium, and magnesium, it helps you achieve thicker and greener grass. You can apply it safely in gardens where children and pets play, as it doesn’t require toxic warning labels. With its dual-action formula, it feeds your grass for up to 90 days, ensuring a long-lasting lush appearance without the worry of brown stains on your hard surfaces.

The A1 Lawn Fertiliser is designed to rejuvenate your lawn after winter and maintain its health during the warmer months. With a high nitrogen content, it promotes lush, green growth, making your grass look vibrant. The added phosphorus strengthens roots and shoots, while potassium ensures a hardy and durable lawn. Additionally, this fertiliser includes iron and magnesium, enhancing photosynthesis and overall greenness. It's easy to apply, requiring no mixing, making it a convenient choice for every gardener.

A1 Lawn Fertiliser is designed specifically for the autumn and winter months, providing your grass with essential nutrients to keep it healthy and lush. Its high potassium content promotes strength and durability, ensuring your lawn withstands the colder weather. Additionally, the phosphorus aids in developing robust roots and shoots, while nitrogen enhances the greenness of your grass. With its moss-killing properties, this fertiliser not only keeps your lawn looking good but also simplifies spring maintenance by preparing your lawn for scarifying.

The A1 Lawn Fertiliser is designed to boost germination and enhance root development in new grass. By adding vital nutrients to the soil, it ensures that your grass seed gets the best possible start. The phosphorus-rich formula promotes healthy roots and shoots, while potassium strengthens your grass against diseases. Additionally, the nitrogen content supports greener blade growth, making your lawn lush and vibrant. This fertiliser is ideal for use in the UK climate, ensuring effective results throughout the growing season.

Pro-Kleen Starter Fertiliser is an excellent choice for giving your lawn a strong beginning. It is best applied 3-5 days before laying turf or seeding, ensuring that your grass receives essential nutrients for healthy growth. Formulated with nitrogen, phosphorus, potassium, and magnesium, it promotes thick, vibrant grass. Additionally, its non-toxic and non-staining formula means you can confidently use it around children and pets. With coverage of up to 83m², it provides great value for your gardening efforts.

The Green Machine Lawn Feed is a fast-acting liquid iron sulphate that helps your grass turn greener quickly. Covering up to 330m², it works effectively on any type of lawn, providing essential nutrients like nitrogen and manganese. You’ll appreciate how easy it is to use; simply mix it with water and apply. Plus, this lawn feed can be used all year round, ensuring your grass stays thick and healthy, even in colder temperatures.

Pro-Kleen Lawn Fertiliser is designed to give your lawn the best start possible. It promotes strong and healthy grass when applied 3-5 days before laying turf or seeding, ensuring a lush and vibrant lawn. With an NPK value of 8-12-8 plus magnesium, it provides essential nutrients for thick and green grass. The non-toxic, non-staining formula allows safe re-entry for children and pets, giving you peace of mind. You can easily apply it by hand or with a spreader, making lawn care simple and convenient.

The Elixir Gardens 9-7-7 Fertiliser is specifically formulated for spring and summer use, boasting a higher nitrogen content that promotes robust grass growth. With one 25kg bag covering up to 712 square metres, it offers great value for maintaining your garden lawn or larger areas like sports fields and horse paddocks. The granular form ensures easy application, allowing you to effortlessly nourish your lawn and enhance its appearance. Just be mindful that the appearance of the fertiliser may vary between batches.

The Ivisons Summer Fertiliser is designed to keep your lawn healthy during the warm months. With its slow-release formula, it nourishes your grass for up to 8-10 weeks, ensuring it remains green and robust even in summer heat. The homogeneous granules provide an even spread of nutrients, avoiding the patchy growth often caused by cheaper alternatives. This high nitrogen mix is vital for promoting strong growth and vibrant colour, making your lawn the envy of the neighbourhood.