Best Fertilizer for Rhododendrons and Azaleas in 2025
Updated on August 2025
#1
Recommended
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- Promotes acidic soil conditions ideal for Azaleas, Camellias, and Gardenias.
- Supplies essential nutrients while helping manage soil acidity.
- Contains a balanced N-P-K ratio of 9-15-13 (Nitrogen, Phosphate, Soluble Potash).
- Recommended feeding schedule: early spring, post-bloom, and fall.
- Application: 1/4 to 1/2 cup for 1-5 ft plants; 3/4 to 1 1/4 cups for 6-12 ft plants.
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- Promotes acidic soil conditions ideal for Azaleas, Camellias, and Gardenias.
- Supplies essential nutrients while helping manage soil acidity.
- Contains a balanced N-P-K ratio of 9-15-13 (Nitrogen, Phosphate, Soluble Potash).
- Recommended feeding schedule: early spring, post-bloom, and fall.
- Application: 1/4 to 1/2 cup for 1-5 ft plants; 3/4 to 1 1/4 cups for 6-12 ft plants.
#2
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- Designed for acid-loving plants to promote healthy growth and vibrant blooms
- Supports a variety of acid-loving plants, including azaleas, gardenias, and orchids
- Encourages rapid root development for quicker results
- Provides nourishment and acidity simultaneously for optimal foliage and flowering
- Compatible with Miracle-Gro Garden Feeder and standard watering cans
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- Designed for acid-loving plants to promote healthy growth and vibrant blooms
- Supports a variety of acid-loving plants, including azaleas, gardenias, and orchids
- Encourages rapid root development for quicker results
- Provides nourishment and acidity simultaneously for optimal foliage and flowering
- Compatible with Miracle-Gro Garden Feeder and standard watering cans
#3
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- Provides essential nutrients for acid-loving plants such as azaleas, camellias, and rhododendrons.
- Suitable for both indoor and outdoor plants, including gardenias and orchids.
- Recommended application every 7-14 days using a watering can or garden feeder.
- Safe for use around other plants without causing damage or burning foliage.
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- Provides essential nutrients for acid-loving plants such as azaleas, camellias, and rhododendrons.
- Suitable for both indoor and outdoor plants, including gardenias and orchids.
- Recommended application every 7-14 days using a watering can or garden feeder.
- Safe for use around other plants without causing damage or burning foliage.
#4
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- 14-7-7 nutrient formulation
- Ready to use, no mixing needed
- Slow-release formula for extended feeding
- Includes essential micronutrients
- Available in a 3.5 lbs size
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- 14-7-7 nutrient formulation
- Ready to use, no mixing needed
- Slow-release formula for extended feeding
- Includes essential micronutrients
- Available in a 3.5 lbs size
#5
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- Contains essential nutrients such as magnesium, iron, and manganese to prevent chlorosis in acid-loving plants.
- Effective soil acidifier, crucial for azaleas, hydrangeas, and gardenias, ensuring optimal growth in neutral or alkaline soils.
- Bio-solid fertilizer rich in beneficial microbial life, refined to eliminate toxins and heavy metals for safe use.
- Easy application: simply sprinkle granules around plants, mix into soil, and water for straightforward plant care.
- Cost-effective with slow-release granules, requiring only three feedings per year for sustained nutrition.
- Specifically formulated to enhance berry production, ideal for blueberries and other berry plants.
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- Contains essential nutrients such as magnesium, iron, and manganese to prevent chlorosis in acid-loving plants.
- Effective soil acidifier, crucial for azaleas, hydrangeas, and gardenias, ensuring optimal growth in neutral or alkaline soils.
- Bio-solid fertilizer rich in beneficial microbial life, refined to eliminate toxins and heavy metals for safe use.
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#6
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- Non-GMO Project Verified fertilizer in the U.S.A.
- Safe for people and pets; free from synthetic chemicals and toxic ingredients.
- Crafted from human and feed grade ingredients; enriched with essential minerals and elements for healthy soil and vegetables.
- Meets standards set by OMRI, OIM, CCOF, NOP, and Non-GMO Project for transparency and purity.
- Sustainably produced in the U.S.A. by a team of environmentalists, formulated to support home gardening.
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- Non-GMO Project Verified fertilizer in the U.S.A.
- Safe for people and pets; free from synthetic chemicals and toxic ingredients.
- Crafted from human and feed grade ingredients; enriched with essential minerals and elements for healthy soil and vegetables.
- Meets standards set by OMRI, OIM, CCOF, NOP, and Non-GMO Project for transparency and purity.
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#7
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- Organic fertilizer suited for acid-loving plants like azaleas and blueberries.
- Natural and organic ingredients with a 4-3-4 nutrient analysis.
- Best applied in spring and fall; water thoroughly after application.
- Certified for organic gardening and meets organic production standards.
- Manufactured by the Espoma Company, a leader in natural organics since 1929.
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- Organic fertilizer suited for acid-loving plants like azaleas and blueberries.
- Natural and organic ingredients with a 4-3-4 nutrient analysis.
- Best applied in spring and fall; water thoroughly after application.
- Certified for organic gardening and meets organic production standards.
- Manufactured by the Espoma Company, a leader in natural organics since 1929.
#8
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- Designed for rhododendrons, azaleas, and other Ericaceae plants
- Sold in a convenient 8 oz (250mL) liquid form
- Formulated to provide essential nutrients for optimal plant health
- Suitable for use on a variety of flowering shrubs
- Helps promote vibrant blooms and lush foliage
- Easy-to-apply liquid fertilizer for effective results
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- Designed for rhododendrons, azaleas, and other Ericaceae plants
- Sold in a convenient 8 oz (250mL) liquid form
- Formulated to provide essential nutrients for optimal plant health
- Suitable for use on a variety of flowering shrubs
- Helps promote vibrant blooms and lush foliage
- Easy-to-apply liquid fertilizer for effective results
#9
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- Safe for pets and humans when applied correctly
- Provides long-lasting nutrition for several months
- Includes probiotics and beneficial microbial strains, along with mycorrhizae
- Enhances soil acidity; made from 100% natural ingredients; promotes healthier blooms
- Quick nutrient release for effective feeding over an extended period
- Fully organic formula supplies essential nutrients, reducing the need for chemical fertilizers
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- Safe for pets and humans when applied correctly
- Provides long-lasting nutrition for several months
- Includes probiotics and beneficial microbial strains, along with mycorrhizae
- Enhances soil acidity; made from 100% natural ingredients; promotes healthier blooms
- Quick nutrient release for effective feeding over an extended period
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#10
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- 16 oz bottle produces 16 gallons of food, while the 32 oz bottle yields 32 gallons for extended care.
- Contains nitrogen for foliage, phosphorus for roots, and potassium for vibrant blooms, promoting healthy growth in azaleas.
- Includes key nutrients like calcium, magnesium, and zinc to enhance flowering and leaf color.
- Designed to address nutrient deficiencies, supporting vigorous blooms and rich leaf coloration in azaleas.
- Suitable for all azalea varieties, including Encore and Formosa, delivering tailored nourishment for acid-loving plants.
- Mix with water for easy application; recommended feeding every 1-2 weeks in the growing season and every 4 weeks in cooler months.
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- 16 oz bottle produces 16 gallons of food, while the 32 oz bottle yields 32 gallons for extended care.
- Contains nitrogen for foliage, phosphorus for roots, and potassium for vibrant blooms, promoting healthy growth in azaleas.
- Includes key nutrients like calcium, magnesium, and zinc to enhance flowering and leaf color.
- Designed to address nutrient deficiencies, supporting vigorous blooms and rich leaf coloration in azaleas.
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