Best Outdoor Flower Fertilisers of 2025

The Westland Hydrangea Bundle is designed to enhance the beauty of your hydrangeas. The 1L High-Performance Liquid Plant Food provides essential nutrients that help your plants thrive, ensuring vibrant flowers and healthier growth. You should apply it weekly for the best results. Additionally, the 500g Colourant allows you to change the colour of your pink hydrangeas to stunning blue hues, adding a unique touch to your garden. For optimal results, use the colourant in acid soils and consider using ericaceous compost for alkaline conditions.

GS Plant Foods Flower Power Fertiliser offers quick absorption of essential nutrients, ensuring accelerated growth and vibrant blooms for your plants. Its concentrated formula means you only need a small amount, making it both potent and economical. Packed with macro and micro-nutrients, it optimises soil conditions for seed germination and root growth, helping your flowers thrive. Additionally, the easy application method allows you to mix it with water and feed your plants simply, ensuring they receive the right balance of nutrients.

Will & Al's Bloom Fertiliser is a nutrient-rich solution made from 100% natural ingredients, designed to enhance plant strength and promote stunning blooms. By using this fertiliser, you can ensure healthier plants throughout the growing season, whether in pots, baskets, or garden beds. Its balanced composition includes essential nutrients like nitrogen for lush growth, phosphorous for strong roots, and potassium for sturdy stems, giving your plants a comprehensive boost. Plus, it’s safe for pets and wildlife, creating a nurturing environment for all.

The Rose Focus Fertiliser offers balanced nutrition for both indoor and outdoor roses. This specially formulated solution caters to the nutritional needs of potted rose plants, ensuring they thrive even as soil fertility decreases. This is particularly beneficial for those using pots and containers, where maintaining soil quality can be challenging. By simply mixing 10ml of this fertiliser in 1 litre of clean water, you can alternate your watering routine, providing essential nutrients to your roses while also using plain water.

TOPLINE Westland Hydrangea Plant Food is a specially tailored feed that provides essential nutrients for your hydrangeas, helping them to flourish with beautiful blooms. Using this liquid plant food weekly ensures that your hydrangeas, whether in containers or the ground, receive the nourishment they need to prevent disease and promote healthier, more vibrant flowers. This feed also increases the size and quantity of blooms, making it a popular choice among gardeners. For optimal results, apply to the soil during planting and as a top dressing in spring.

Rose Focus Fertiliser provides balanced nutrition for both indoor and outdoor roses. It is specially formulated to meet the needs of potted rose plants, ensuring they receive essential nutrients. As soil fertility can decline, particularly in pots and containers, this product helps maintain healthy growth. To use, simply mix 10ml of the solution in 1 litre of clean water and alternate watering with plain water, making it easy for you to keep your roses thriving.

The 6X Chicken Manure Fertiliser is a versatile 100% natural option for your garden. It is ideal for all flowers, shrubs, vegetables, lawns, outdoor pot plants, trees, and roses, ensuring your plants thrive. This product boosts garden life and encourages the earthworm population, which is beneficial for soil health. Additionally, it is thoroughly composted, heat sterilised, and milled, resulting in a weed and bug-free texture that is easy to handle. You will find it pleasant to use, making gardening tasks more enjoyable.

Plant Grow Fertiliser is a versatile liquid feed suitable for all your plants, including fruits, vegetables, grass, and indoor houseplants. Being 100% natural and eco-friendly, it boosts soil health without harming the environment. Simply mix it with tap water and pour it over your plants for vibrant leaves and blossoms. This fertiliser also strengthens your plants against diseases and environmental stresses, ensuring healthier growth and a bountiful harvest.

The GardenNova Citrus Fertilizer is specially crafted for indoor citrus trees, offering a unique 3-1-2 blend of nutrients to promote healthy growth. Its 100% organic formula means you can nourish your plants without harmful chemicals, allowing them to thrive naturally indoors. This fertiliser enhances the flavour, colour, and aroma of your fruits, ensuring they are juicy and vibrant. Additionally, it strengthens your trees against indoor stressors, helping them flourish throughout the year.

JR Peters Jack's Classic Blossom Booster is a professional fertiliser designed to enhance the bloom and vibrancy of your indoor and outdoor flowering plants. With a nutrient ratio of 10-30-20, it promotes the growth of beautiful flowers on varieties such as geraniums and marigolds. This fertiliser feeds your plants through both roots and leaves, ensuring they receive essential nutrients efficiently. Additionally, it is suitable for vegetables and fruit, making it a versatile choice for your garden.