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10 Best Fertilizers For Hydrangeas 2025 in the United States

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Our Top Picks

#1

Winner

Miracle-Gro Water Soluble All Purpose Plant Food, Fertilizer for Indoor or Outdoor Flowers, Vegetables or Trees, 3 lbs.

Miracle-Gro Water Soluble All Purpose Plant Food is a versatile fertilizer suitable for a variety of plants including hydrangeas. It is full of essential nutrients and is designed to instantly feed plants, promoting larger and more vibrant growth. The product is easy to use with either the Miracle-Gro Garden Feeder or a standard watering can and should be applied every 1-2 weeks for best results.

It is safe for all types of plants when used as directed, reducing the risk of burning the plants. This fertilizer is synthetic, which might be a concern for users preferring organic options. However, it does not specifically adjust soil pH, which is an important consideration for hydrangeas that thrive in slightly acidic soil.

The product's wide application and ease of use make it a convenient choice, though it may require supplementary pH adjustments for optimal hydrangea health.

#2

GARDENWISE 8-4-8 Acidic Fertilizer for Azaleas, Camellias (Camelia), Hydrangeas, Blueberries, Gardenias, Magnolia Trees, Evergreens, and Rhododendrons - Ideal Iron-Rich Plant Food (1/2 Quart)

Rating
9.4
N-P-K Ratio
Micronutrients

Most important from
1817 reviews

N-P-K Ratio
The GARDENWISE 8-4-8 Acidic Fertilizer is a reliable choice for gardeners looking to support their acid-loving plants.
Micronutrients
The balanced nutrient composition supports overall plant health, encouraging robust growth and vibrant blooms.

The GARDENWISE 8-4-8 Acidic Fertilizer is designed for acid-loving plants like hydrangeas, azaleas, camellias, and more. With an N-P-K ratio of 8-4-8, it provides a balanced mix of nitrogen, phosphorus, and potassium, essential for plant growth and vibrant blooms. The inclusion of magnesium, iron, and manganese helps prevent chlorosis and promotes robust plant health.

This fertilizer acts as a soil acidifier, making it ideal for plants that struggle in neutral or alkaline soils. It also enhances soil health with beneficial microbes due to its bio-solid composition, which is eco-friendly and safe for gardens. The granulated form makes application simple and straightforward – just sprinkle, mix, and water. Its slow-release formula means it only requires three feedings per year, offering a cost-effective solution for gardeners.

However, it's important to note that this is a synthetic fertilizer, which may not appeal to those seeking organic options. While the product is designed for a wide range of plants, its effectiveness will depend on the specific pH and nutrient needs of your garden. It’s an excellent choice for gardeners looking to support acid-loving plants with minimal effort and sustained results throughout the year.

Rating
9.4
N-P-K Ratio
Micronutrients

Most important from
1817 reviews

N-P-K Ratio
The GARDENWISE 8-4-8 Acidic Fertilizer is a reliable choice for gardeners looking to support their acid-loving plants.
Micronutrients
The balanced nutrient composition supports overall plant health, encouraging robust growth and vibrant blooms.
#3

TPS NUTRIENTS Hydrangea Fertilizer for Acid Loving Plants, Liquid Plant Food 8 oz (250mL)

Rating
9.2
Type of Fertilizer
Soil pH Adjusters
Micronutrients

Most important from
441 reviews

Type of Fertilizer
This liquid plant food is easy to use—just mix it with water and feed your plants as directed.
Soil pH Adjusters
It really makes a noticeable difference for acid-loving plants like hydrangeas.
Micronutrients
It’s gentle on the plants while providing them with the nutrients they need to thrive.

TPS NUTRIENTS Hydrangea Fertilizer is designed specifically for acid-loving plants like hydrangeas. As a liquid fertilizer, it’s easy to apply and can be quickly absorbed by the plants, which can be a significant advantage for gardeners looking for immediate results.

The liquid volume is 8 fluid ounces, making it suitable for medium coverage areas. This product is manufactured in the USA, indicating a level of quality control and manufacturing standards.

TPS NUTRIENTS Hydrangea Fertilizer is user-friendly and likely effective for acid-loving plants, ensuring it meets the gardening needs for such specific plants.

Rating
9.2
Type of Fertilizer
Soil pH Adjusters
Micronutrients

Most important from
441 reviews

Type of Fertilizer
This liquid plant food is easy to use—just mix it with water and feed your plants as directed.
Soil pH Adjusters
It really makes a noticeable difference for acid-loving plants like hydrangeas.
Micronutrients
It’s gentle on the plants while providing them with the nutrients they need to thrive.

Buying Guide for the Best Fertilizers For Hydrangeas

Choosing the right fertilizer for your hydrangeas is crucial to ensure they grow healthy and produce beautiful blooms. Hydrangeas have specific nutrient 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 consider when selecting a fertilizer for your hydrangeas.
N-P-K RatioThe N-P-K ratio represents the percentage of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer. Nitrogen promotes leafy growth, phosphorus supports root and flower development, and potassium enhances overall plant health. For hydrangeas, a balanced ratio like 10-10-10 or a bloom-boosting formula with higher phosphorus, such as 10-20-10, can be beneficial. If you want to encourage more blooms, opt for a fertilizer with higher phosphorus. For general maintenance, a balanced ratio is suitable.
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 nutrient absorption and are ideal for immediate feeding. Slow-release fertilizers gradually release nutrients over several months, reducing the need for frequent applications. Choose granular or slow-release fertilizers for steady growth and liquid fertilizers for a quick nutrient boost.
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 you achieve the desired bloom color. If you want blue flowers, look for fertilizers with sulfur or aluminum sulfate to lower the pH. For pink flowers, choose fertilizers with lime to raise the pH. Adjust the soil pH according to your color preference.
Organic vs. SyntheticOrganic fertilizers are made from natural materials and release nutrients slowly, improving soil health over time. Synthetic fertilizers are chemically formulated and provide immediate nutrient availability. Organic options, such as compost or manure, are ideal for gardeners who prefer natural products and want to enhance soil structure. Synthetic fertilizers are suitable for those seeking quick results and precise nutrient control. Choose based on your gardening philosophy and the specific needs of your hydrangeas.
MicronutrientsIn addition to the primary nutrients (N-P-K), hydrangeas also benefit from micronutrients like iron, magnesium, and calcium. These micronutrients support various plant functions and overall health. Some fertilizers include these essential micronutrients, ensuring your hydrangeas receive a well-rounded nutrient supply. Check the fertilizer label for added micronutrients, especially if your soil is deficient in any of these elements. Opt for fertilizers with micronutrients for comprehensive plant nutrition.

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