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3 Best Fertilizer For Hydrangeas 2025 in the UK

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#1

Winner

Westland 20100444 Hydrangea High Performance Liquid Plant Food 1 Litre, Green

Westland 20100444 Hydrangea High Performance Liquid Plant Food is designed to boost the health and appearance of hydrangeas. This liquid fertilizer promises bigger blooms and greener leaves thanks to its nitrogen content. It also includes a moisture control booster to help prevent drought conditions, which is useful for maintaining plant health during dry periods.

The inclusion of iron aids in nutrient availability across different soil pH levels, making it versatile for various growing conditions. This fertilizer is synthetic, which means it acts quickly but might not offer the long-term benefits of organic options. Suitable for those looking for immediate results in boosting their hydrangeas' performance, especially if they're seeking medium coverage for their garden.

#2

VIitax Hydrangea Liquid Feed. For bigger blooms of flowers. Concentrated 1 Litre - Makes 225 Litres

Rating
9.6
Micronutrients
Micronutrients
Witnessed blooms on previously unflowering hydrangeas, indicating a significant impact on flowering.

VIitax Hydrangea Liquid Feed is tailored specifically for hydrangeas, whether they are in pots or planted in the garden. One of its strengths is the balanced nutrient blend, including nitrogen for rich green leaf color, potassium to boost flowering, and micronutrients like iron and manganese for strong growth. This mix helps ensure healthier plants with abundant and bright blooms, which are key benefits for hydrangea enthusiasts.

Additionally, the product is highly concentrated, with 1 litre making up to 225 litres, making it economical in the long run. However, it's worth noting that the product being synthetic may not appeal to those preferring organic options. Also, while it covers medium areas, users with large gardens may require multiple packages.

This liquid form is easy to apply but requires careful mixing to avoid over or under-dilution. The product does not specifically address soil pH adjustment, which might be necessary for optimal hydrangea growth depending on your soil condition. Vitax Hydrangea Liquid Feed appears to be a valuable choice for those looking to enhance their hydrangeas' growth and bloom quality with a tailored nutrient solution.

Rating
9.6
Micronutrients
Micronutrients
Witnessed blooms on previously unflowering hydrangeas, indicating a significant impact on flowering.
#3

Vitax 6HF1 1 kg Hydrangea Feed - N/A

Vitax Hydrangea Feed is a granulated fertilizer designed specifically for hydrangeas, with a nutrient ratio of 3:1:2 (N-P-K), which supports healthy foliage and abundant flowering. It stands out by including added magnesium and iron, two micronutrients that hydrangeas particularly benefit from to maintain vibrant leaf color and strong blooms. This targeted formula helps improve plant health and vitality, making it a good choice for gardeners wanting to enhance hydrangea growth and flower quality.

The product comes in a resealable 1kg pouch, making it convenient to store and use as both a soil amendment during planting and as a top dressing in spring. Being granular, it’s easy to apply but requires careful handling as with most fertilizers. One drawback is that the product does not specify whether it adjusts soil pH, which is often important for hydrangeas to influence flower color. It appears to be a synthetic fertilizer, so gardeners looking for organic options might want to consider alternatives.

Given these points, Vitax Hydrangea Feed suits home gardeners seeking a straightforward, effective fertilizer tailored to hydrangeas, especially when vibrant blooms and plant health are priorities.

Buying Guide for the Best Fertilizer For Hydrangeas

Choosing the right fertilizer for your hydrangeas is crucial to ensure they grow healthy and produce beautiful blooms. Hydrangeas have specific nutritional needs, and understanding these needs will help you select the best fertilizer. When picking a fertilizer, consider the type of hydrangea you have, the soil condition, and the desired bloom color. Here are some key specifications to look for and explanations to help you make an informed decision.
N-P-K RatioThe N-P-K ratio represents the percentage of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer. Nitrogen promotes leaf growth, phosphorus encourages root and flower development, and potassium helps overall plant health. For hydrangeas, a balanced ratio like 10-10-10 or one slightly higher in phosphorus, such as 10-20-10, is often recommended. If your hydrangeas need more blooms, opt for a higher phosphorus content. Assess your plant's needs and choose accordingly.
Type of FertilizerFertilizers come in various forms, including granular, liquid, and slow-release. Granular fertilizers are easy to apply and provide nutrients over time. Liquid fertilizers offer quick absorption and are ideal for immediate nutrient needs. Slow-release fertilizers gradually release nutrients, reducing the frequency of application. Consider your gardening routine and the specific needs of your hydrangeas when choosing the type. If you prefer less frequent applications, slow-release might be best. For quick results, liquid fertilizers are a good choice.
Soil pH AdjustersHydrangeas can change color based on soil pH. Acidic soil (pH below 6) produces blue flowers, while alkaline soil (pH above 7) results in pink flowers. Some fertilizers contain pH adjusters to help achieve the desired bloom color. If you want blue flowers, look for fertilizers with sulfur or aluminum sulfate. For pink flowers, choose those with lime. Determine the current pH of your soil and decide on the bloom color you prefer to select the appropriate fertilizer.
MicronutrientsMicronutrients like iron, magnesium, and calcium are essential for hydrangea health, though needed in smaller amounts compared to N-P-K. These nutrients support various plant functions, including chlorophyll production and enzyme activity. Check the fertilizer label for the presence of these micronutrients. If your hydrangeas show signs of nutrient deficiency, such as yellowing leaves, a fertilizer with added micronutrients can help. Choose a fertilizer that includes these elements to ensure comprehensive nutrition.
Organic vs. SyntheticOrganic fertilizers are derived from natural sources and improve soil health over time, while synthetic fertilizers provide immediate nutrient availability. Organic options include compost, manure, and bone meal, which release nutrients slowly and enhance soil structure. Synthetic fertilizers offer precise nutrient ratios and quick results. Consider your gardening philosophy and the long-term health of your soil. If you prefer sustainable practices, organic fertilizers are ideal. For immediate nutrient needs, synthetic fertilizers are effective.