Best Slow-Release Multi-Purpose Fertilisers of 2026
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Slow-release multi-purpose fertilisers are a type of fertiliser that are designed to release nutrients slowly over time, providing plants with a steady supply of the nutrients they need to grow and thrive. These fertilisers are ideal for use in a variety of settings, including gardens, lawns, and agricultural fields. They can help to improve soil quality, promote healthy plant growth, and increase crop yields. Slow-release fertilisers are also more environmentally friendly than traditional fertilisers, as they reduce the risk of nutrient run-off and pollution. Overall, slow-release multi-purpose fertilisers are a highly effective and sustainable way to promote healthy plant growth and improve soil quality.
At a Glance: Our Top Picks
#TOP 1
9.8
#TOP 2
9.7
#TOP 3
9.5
Top 4 Slow-Release Multi-Purpose Fertilisers
Osmocote Pro 1kg Slow Release Fertiliser
Osmocote Pro Fertiliser provides all the nutrients your plants need throughout their entire growth cycle. It is specially designed to be mixed into growing media, ensuring that your plants receive consistent nutrition. With a high NPK content of 17-9-10, it supports robust plant development. The product also includes a full trace element package, which enhances overall plant health and growth. You will find it easy to use, making it a convenient choice for gardeners of all levels.
Miracle Gro Slow Release Plant Food for Azaleas
The Miracle Gro Plant Food offers a richer, greener lawn in just five days, helping you quickly improve your garden’s appearance. It is easy to apply, either with the Miracle-Gro Feeder or by mixing it in a watering can, making feeding your plants hassle-free. With an NPK ratio of 36-6-6, it provides balanced nutrition to support healthy growth. This product also covers up to 400 square metres, so you can feed a large area efficiently without frequent reapplication.
Devonia Fern & Palm Slow-Release Plant Food Sticks
The Devonia Plant Food Sticks are designed to feed your ferns and palm plants right at the roots, ensuring strong growth and vibrant leaves. With natural sea bird guano included, they promote healthy roots and lush foliage throughout the growing season. Each stick is pre-measured, so you won’t need to mix or guess quantities, helping you avoid overfeeding. They are simple to use—just insert a stick into the soil near your plant’s base for mess-free, targeted nourishment that supports your plants’ health with ease.
Vitax Bonemeal Fertiliser for Healthy Plants
Vitax Bonemeal Fertiliser is a reliable organic option for your gardening needs. This sterilised bonemeal provides essential nutrients, including phosphate and nitrogen, which are crucial for promoting healthy plant growth. Using this fertiliser will help ensure that your plants thrive, delivering vibrant blooms and robust foliage. With a package weight of 10.44 kilograms, you can easily manage your gardening tasks without frequent trips to the shop.
Frequently Asked Questions (FAQs)
1. Which fertilizers are slow release?
8 Types of Slow Release Nitrogen to Look For on the Label. Urea Formaldehyde.Methylene Urea.Isobutylidene diurea.Sulfur-Coated Urea.Polymer-Coated Urea.Polymer-Coated Sulfur-Coated Urea.UMAXX & UFLEXX.Organic Sources of Nitrogen.
2. Is slow-release fertilizer better?
While it works more slowly, slow-release fertilizer is ideal for established lawns to keep them lush and thick, yet prevent huge spikes in growth. Pros of slow-release fertilizer: Slow-release means nutrients are released more uniformly across the lawn in a slow, steady fashion.
3. When should I use slow-release fertilizer?
Fertilizing Your Landscaping: It's best to fertilize your landscape plants late in the winter or early in the spring in preparation for the growing season. With controlled or slow release fertilizers, this should be all you need for good foliage and root growth the spring and summer months.
During our slow-release multi-purpose fertiliser research, we found 105 slow-release multi-purpose fertiliser products and shortlisted 4 quality products. We collected and analyzed 6,150 customer reviews through our big data system to write the slow-release multi-purpose fertilisers list. We found that most customers choose slow-release multi-purpose fertilisers with an average price of £13.02.
The slow-release multi-purpose fertilisers are available for purchase. We have researched hundreds of brands and picked the top brands of slow-release multi-purpose fertilisers, including Miracle-Gro, Vitax Ltd.
Toby Butcher is a Horticulturist, and he earned his title as a Master Gardener in 2016. Toby has acquired a 25-year experience as a home gardener planting, designing, grooming vegetables and flowers. He is the leader of a plant group in Durham. Toby owns a blog where he publishes articles on growing and growing your flowers at home, in a vase, or in a garden.