What Fertilizer is Best for Hydrangeas

What Fertilizer is Best for Hydrangeas?

When it comes to cultivating beautiful hydrangeas, choosing the right fertilizer is crucial. Hydrangeas are known for their stunning, vibrant blooms, and with the right care, you can enhance their growth and overall health. In this article, we will explore the best fertilizers for hydrangeas, taking into account various factors such as nutrient composition, application methods, and expert recommendations. Whether you’re a seasoned gardener or a beginner, this comprehensive guide will provide you with the knowledge you need to make informed decisions about fertilizing your hydrangeas.

Understanding Hydrangeas’ Nutrient Needs

Before diving into the specifics of fertilizers, it’s important to understand the nutrient requirements of hydrangeas. These beautiful flowering plants thrive when provided with the right balance of essential nutrients. The primary nutrients that hydrangeas need are nitrogen (N), phosphorus (P), and potassium (K), commonly referred to as NPK.

Nitrogen is responsible for promoting healthy foliage growth and vibrant green leaves. When deciding what side of the house do you plant hydrangeas, consider that phosphorus aids in root development, flower production, and overall plant strength. Potassium helps hydrangeas withstand environmental stressors, improves disease resistance, and enhances flower color and quality.

Types of Fertilizers for Hydrangeas

1. Balanced Fertilizers

Balanced fertilizers, such as 10-10-10 or 14-14-14, are widely used for hydrangeas. The numbers represent the NPK ratio, indicating the percentage of each nutrient in the fertilizer. These ratios ensure that hydrangeas receive equal amounts of nitrogen, phosphorus, and potassium, promoting overall plant health and balanced growth.

2. Acidifying Fertilizers

If you have blue or purple hydrangea varieties that prefer acidic soil conditions, acidifying fertilizers can help maintain the desired pH level. These fertilizers contain added sulfur, which lowers the soil pH and creates an environment suitable for blue flower coloration. Acidifying fertilizers typically have a higher phosphorus content to support flower production and root development.

3. Slow-Release Fertilizers

Slow-release fertilizers provide a steady supply of nutrients to hydrangeas over an extended period. These fertilizers come in various forms, including granules, pellets, or spikes. Slow-release fertilizers are convenient for those who prefer less frequent applications and offer a gradual release of nutrients, reducing the risk of over-fertilization.

4. Organic Fertilizers

For gardeners who prefer organic options, there are several organic fertilizers available for hydrangeas. These fertilizers are derived from natural sources such as compost, manure, or bone meal. Organic fertilizers enrich the soil with beneficial microorganisms and nutrients, improving soil structure and fertility over time. They are an excellent choice for those aiming to cultivate their hydrangeas using environmentally friendly practices.

Best Fertilizer Brands for HydrangeasWhat Fertilizer is Best for Hydrangeas

Now that we’ve explored different types of fertilizers, let’s delve into some reputable brands that offer high-quality options for hydrangea fertilization. Remember, always follow the manufacturer’s instructions for application rates and timings.

1. Miracle-Gro

Miracle-Gro is a well-known brand that offers a range of fertilizers suitable for various plants, including hydrangeas. Their water-soluble All Purpose Plant Food is a popular choice, providing a balanced blend of essential nutrients. It is convenient for regular feedings and promotes lush foliage and vibrant blooms.

2. Jobe’s Organics

Jobe’s Organics is renowned for its organic gardening products. Their Organic Fertilizer Spikes for Roses, Hydrangeas, and Azaleas are an excellent option for those seeking an organic approach. These spikes deliver nutrients directly to the plant’s roots, ensuring efficient absorption and long-lasting effects.

3. Espoma

Espoma is a trusted brand in the gardening community, offering a range of organic fertilizers. Their Holly-Tone Fertilizer is widely used for acid-loving plants like hydrangeas. It contains natural ingredients and provides a balanced nutrient supply, promoting healthy growth and vibrant flowers.

Research and Expert Recommendations

To support our recommendations, let’s explore some research findings and expert advice on fertilizing hydrangeas.

1. Research on Nitrogen and Flower Color

Research conducted by horticultural scientists has shown that the availability of nitrogen in the soil affects hydrangea flower color. Higher nitrogen levels tend to produce pinker flowers, while lower nitrogen levels result in blue or purple blooms. However, it’s important to strike a balance to avoid excessive foliage growth at the expense of flower production.

2. Expert Tip: Timing is Key

Timing plays a crucial role in fertilizing hydrangeas. Experts recommend applying fertilizers in early spring before new growth emerges. This allows the plants to absorb the nutrients when they need them most. Additionally, a second application during mid-summer can provide an extra boost for hydrangeas during their active growing season.

3. Adjusting Soil pH

For those aiming to influence flower color, adjusting soil pH is essential. To enhance blue flower coloration, experts recommend incorporating acidifying amendments such as sulfur or aluminum sulfate into the soil. However, it’s crucial to follow the recommended application rates and monitor the pH levels regularly to prevent excessive acidity.


Choosing the right fertilizer for your hydrangeas can significantly impact their growth, flower production, and overall health. Whether you opt for balanced fertilizers, acidifying formulations, slow-release options, or organic alternatives, the key is to provide your hydrangeas with the essential nutrients they require. Remember to consider the specific needs of your hydrangea variety and follow the instructions provided by the manufacturer. By nourishing your hydrangeas with the best fertilizer for their needs, you can enjoy a stunning display of colorful blooms and maintain healthy, thriving plants.

About the author

Jennifer Robert

Jennifer Robert

Jennifer Robert is a home design blogger with a passion for creating beautiful, functional spaces. She shares her tips and tricks on her blog, and she's always on the lookout for new trends and ideas.

View all posts