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10 Best Fertilizer For Hydrangeas 2025 in the United States
#1
Winner
GARDENWISE Slow Release Hydrangea Fertilizer with Iron & Sulfur – Indoor & Outdoor Soil Acidifier for Miracle Growth (1/2 qt)
The GARDENWISE Slow Release Hydrangea Fertilizer is crafted to cater to the needs of acid-loving plants like hydrangeas. With an N-P-K ratio of 8-4-8, the fertilizer provides a balanced supply of nutrients, supporting vivid blooms and healthy foliage. Its inclusion of iron and sulfur is beneficial for adjusting soil acidity, a crucial requirement for maintaining the vibrant colors of hydrangeas.
Rating
10.0
Chosen by1,443
N-P-K Ratio
Type of Fertilizer
Soil pH Adjusters
Most important from
3590 reviews
#2
Miracle-Gro Water Soluble Bloom Booster Flower Food, Plant Food for Annual and Perennial Flowers, In-Ground and Container Plants, Roses, Hydrangeas, Hibiscus, 5.5 lb.
Miracle-Gro Water Soluble Bloom Booster Flower Food is a versatile and effective fertilizer for hydrangeas and various other flowering plants. Its primary strength lies in its ability to promote more blooms, enhancing the color and vitality of your garden. The water-soluble nature of this product ensures immediate feeding, making it suitable for both in-ground and container plants, including hydrangeas, roses, and hibiscus.
Rating
9.7
Type of Fertilizer
Most important from
8837 reviews
#3
GARDENWISE 8-4-8 Acidic Fertilizer for Azaleas, Camellias (Camelia), Hydrangeas, Blueberries, Gardenias, Magnolia Trees, Evergreens, and Rhododendrons - Ideal Iron-Rich Plant Food (12 OZ)
The GARDENWISE 8-4-8 Acidic Fertilizer is a solid choice for those looking to nourish hydrangeas and other acid-loving plants like azaleas, camellias, and blueberries. Its N-P-K ratio of 8-4-8 provides a balanced mix of nitrogen, phosphorus, and potassium, which supports vibrant blooms and robust growth. The inclusion of essential micronutrients, such as magnesium, iron, and manganese, helps prevent chlorosis and enhances overall plant health.
Rating
9.4
Soil pH Adjusters
Most important from
3590 reviews
Top 10 Best Fertilizer For Hydrangeas 2025 in the United States
#1
Winner
GARDENWISE Slow Release Hydrangea Fertilizer with Iron & Sulfur – Indoor & Outdoor Soil Acidifier for Miracle Growth (1/2 qt)
GARDENWISE Slow Release Hydrangea Fertilizer with Iron & Sulfur – Indoor & Outdoor Soil Acidifier for Miracle Growth (1/2 qt)
N-P-K Ratio: 8-4-8
Type of Fertilizer: Slow Release
Soil pH Adjusters: iron and sulfur
Chosen by 1443 this week
Miracle-Gro Water Soluble Bloom Booster Flower Food, Plant Food for Annual and Perennial Flowers, In-Ground and Container Plants, Roses, Hydrangeas, Hibiscus, 5.5 lb.
Miracle-Gro Water Soluble Bloom Booster Flower Food, Plant Food for Annual and Perennial Flowers, In-Ground and Container Plants, Roses, Hydrangeas, Hibiscus, 5.5 lb.
Type of Fertilizer: Water Soluble
Organic vs. Synthetic: Synthetic
GARDENWISE 8-4-8 Acidic Fertilizer for Azaleas, Camellias (Camelia), Hydrangeas, Blueberries, Gardenias, Magnolia Trees, Evergreens, and Rhododendrons - Ideal Iron-Rich Plant Food (12 OZ)
GARDENWISE 8-4-8 Acidic Fertilizer for Azaleas, Camellias (Camelia), Hydrangeas, Blueberries, Gardenias, Magnolia Trees, Evergreens, and Rhododendrons - Ideal Iron-Rich Plant Food (12 OZ)
N-P-K Ratio: 8-4-8
Type of Fertilizer: Synthetic
Soil pH Adjusters: Effective acidifier
Organic vs. Synthetic: Synthetic
Micronutrients: Magnesium, iron, manganese
Miracle-Gro Shake 'N Feed All Purpose Plant Food, For In-Ground and Container Plants, Feeds for up to 3 Months, 4.5 lbs.
Miracle-Gro Shake 'N Feed All Purpose Plant Food, For In-Ground and Container Plants, Feeds for up to 3 Months, 4.5 lbs.
Type of Fertilizer: Granules
Organic vs. Synthetic: Synthetic
Micronutrients: Yes
Miracle-Gro Pour & Feed Plant Food, Fertilizer Instantly Feeds Live Plants, For Outdoor & Indoor Plants in Containers, 32 oz.
Miracle-Gro Pour & Feed Plant Food, Fertilizer Instantly Feeds Live Plants, For Outdoor & Indoor Plants in Containers, 32 oz.
Type of Fertilizer: Liquid
Organic vs. Synthetic: Synthetic
Related Products
Up to 8% off
Espoma Organic Holly-Tone 4-3-4 Natural & Organic Evergreen & Azalea Plant Food; 36 lb. Bag; The Original & Best Fertilizer for All Acid Loving Plants Including Rhododendrons & Hydrangeas
Espoma Organic Holly-Tone 4-3-4 Natural & Organic Evergreen & Azalea Plant Food; 36 lb. Bag; The Original & Best Fertilizer for All Acid Loving Plants Including Rhododendrons & Hydrangeas
N-P-K Ratio: 4-3-4
Type of Fertilizer: Organic
Soil pH Adjusters: 5% sulfur
Organic vs. Synthetic: Organic
Scotts Super Bloom Water Soluble Plant Food, 2 lb - NPK 12-55-6 - Fertilizer for Outdoor Flowers, Fruiting Plants, Containers and Bed Areas - Feeds Plants Instantly
Scotts Super Bloom Water Soluble Plant Food, 2 lb - NPK 12-55-6 - Fertilizer for Outdoor Flowers, Fruiting Plants, Containers and Bed Areas - Feeds Plants Instantly
N-P-K Ratio: 12-55-6
Type of Fertilizer: Water-soluble
Organic vs. Synthetic: Synthetic
Espoma Organic Soil Acidifier 6 Lb.
Espoma Organic Soil Acidifier 6 Lb.
Type of Fertilizer: Soil Acidifier
Soil pH Adjusters: Elemental sulfur, gypsum
Organic vs. Synthetic: Organic
Miracle-Gro Water Soluble Azalea, Camellia, Rhododendron Plant Food - Fertilizer for Acid-Loving Plants & Flowers, 5 lb.
Miracle-Gro Water Soluble Azalea, Camellia, Rhododendron Plant Food - Fertilizer for Acid-Loving Plants & Flowers, 5 lb.
Type of Fertilizer: Water-soluble
Soil pH Adjusters: Yes
Organic vs. Synthetic: Synthetic
Micronutrients: Yes
#10
Scotts Company Miracle-Gro 1750011 Water Soluble Miracid Acid-Loving Plant Food, 1-Pound (2)
Scotts Company Miracle-Gro 1750011 Water Soluble Miracid Acid-Loving Plant Food, 1-Pound (2)
Type of Fertilizer: Water Soluble
Organic vs. Synthetic: Synthetic
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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 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 leaf 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 like 10-20-10 can be beneficial. If you want more foliage, go for higher nitrogen; for more blooms, choose higher phosphorus. Assess your plant's current growth stage and needs to determine the right ratio.
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 risk of over-fertilization. Choose granular or slow-release for steady growth, and liquid for a quick nutrient boost. Consider your gardening routine and how often you can fertilize when selecting the type.
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 include pH adjusters to help you 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. Test your soil pH before selecting a fertilizer to ensure it aligns with your color preference.
Organic vs. SyntheticOrganic fertilizers are made from natural materials and improve soil health over time, while synthetic fertilizers are chemically formulated for immediate nutrient availability. Organic options, like compost or manure, are environmentally friendly and enhance soil structure. Synthetic fertilizers provide precise nutrient ratios and faster results. If you prefer a natural approach and long-term soil benefits, go organic. For quick and targeted feeding, synthetic fertilizers are a good choice.
MicronutrientsIn addition to the primary nutrients (N-P-K), hydrangeas also need micronutrients like iron, magnesium, and calcium for optimal growth. Some fertilizers include these micronutrients to prevent deficiencies and promote overall plant health. Check the fertilizer label for a comprehensive nutrient profile. If your hydrangeas show signs of nutrient deficiency (e.g., yellowing leaves), choose a fertilizer with added micronutrients to address these issues.