Best Slow-Release Flower Fertilisers of 2025

Gro-Sure Shrub Food is an excellent choice for feeding your roses and shrubs, whether they are planted in open ground or in containers. With just one application, this feed offers a unique blend of fast-acting and long-lasting nutrients, ensuring your plants receive essential nourishment for up to six months. The fertiliser’s NPK ratio of 13-7-18.5 supports healthy growth and vibrant blooms, making it easy for you to maintain a flourishing garden with minimal effort.

Vitax Q4 Fertiliser is an all-purpose solution perfect for flowers, vegetables, fruits, and more. This professional-quality fertiliser promotes bigger, brighter blooms and bumper crops, ensuring your garden thrives. It contains essential nutrients and trace elements for healthy growth, making it ideal for any gardener. Additionally, its easy-to-handle, low dust, pelleted format means you can apply it without the mess. Simply work it into the soil and water it in for optimal results.

The Gro-Sure Plant Food offers an effortless solution for nourishing your plants. With just one application, you will provide an initial burst of energy, ensuring your plants get the boost they need right away. This product then supplies continuous feeding for up to six months, giving your plants the essential nutrients throughout the growing season. It is versatile enough for all non-ericaceous plants, making it ideal for pots, containers, beds, borders, and hanging baskets. You can enjoy healthy and thriving plants without constant reapplication.

The Goulding G60114 Fertiliser is designed to condition and enrich your soil, ensuring that your plants have the best foundation for growth. By promoting stronger roots, it helps you cultivate healthier plants that can withstand various conditions. You will also enjoy vibrant blooms, adding beauty to your garden. Enriched with humics, this fertiliser enhances soil quality, making it an excellent choice for any gardening enthusiast looking to improve their plant health.

The Incredibloom Fertiliser is designed to help you grow up to four times more flowers, making it an excellent choice for any garden enthusiast. With its ability to promote healthy and vigorous green foliage, your plants will look more vibrant than ever. The easy-to-use, on-off single application means you can quickly apply it without any hassle. Additionally, this fertiliser is cost-effective and long-lasting, providing great value for your gardening efforts.

The AMK® Miracle Gro Feed is designed to simplify your gardening routine. With its temperature-controlled coating, it releases nutrients when your plants need them most, ensuring optimal growth. One application in spring can sustain your plants throughout the season, eliminating the hassle of frequent feeding. This fertiliser is packed with essential nutrients that promote strong and healthy plants. Perfect for all acid-loving plants, it also features natural ingredients, making it an eco-friendly choice for conscientious gardeners.

The Miracle-Gro Plant Food is specially designed for ericaceous, acidophilic, or lime-sensitive plants. Its slow release formula means you won't need to feed your plants regularly, saving you time and effort. With patented technology used by professionals, one application can nourish your plants for nearly six months. This product contains all the essential nutrients, ensuring your plants grow strong and healthy, potentially reaching up to twice their size.

The You Garden Fertiliser Discs are an innovative solution for gardeners looking to enhance their hanging baskets, planters, tubs, and window boxes. These discs provide a slow-release fertiliser that nurtures your plants over several months, ensuring they receive the nutrients they need for a healthy start. You will appreciate the reduced effort in watering during the summer months, making plant care much easier. Supplied in a re-sealable pouch, they are convenient to store and use whenever needed.

The Wrubxvcd Plant Food is a high-quality, slow-release fertiliser designed for all types of houseplants, including succulents, fruits, flowers, and vegetables. Its professional formulation ensures safety and health for your plants when used correctly. This fertiliser provides all the essential nutrients needed to promote robust growth, giving you peace of mind that your plants will thrive. Additionally, its convenient usage makes it easy for you to care for your garden without the hassle of frequent applications.

Miracle-Gro Plant Food is designed to help your azaleas, camellias, and rhododendrons thrive. By using this product, you can expect your plants to grow twice as big, which is perfect for creating a stunning garden display. The convenient shaker jar allows for easy application, making feeding your plants a straightforward task. This flower fertiliser is specifically formulated to provide the essential nutrients that these beautiful plants need, ensuring they remain healthy and vibrant throughout the growing season.