Best Fertilizer for Rhododendrons in 2025
Updated on August 2025
#1
Recommended
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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.
#2
Value for Money
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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
#3
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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
#4
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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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#5
22% Off
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- Holly-tone is a specialized fertilizer designed for acid-loving plants, providing a sustained release of nutrients.
- Suitable for a variety of plants including azaleas, hydrangeas, blueberries, and camellias, which thrive in acidic soils.
- Formulated with natural and organic ingredients, Holly-tone features a 4-3-4 nutrient ratio with added sulfur and is environmentally safe.
- Recommended application periods are spring and fall for shrubs, with early and late spring for berries; apply around the plant's drip line.
- Certified for organic gardening, Holly-tone meets the standards for organic production.
- Manufacturer Espoma has been a leader in natural organics since 1929, producing this product in the USA.
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- Holly-tone is a specialized fertilizer designed for acid-loving plants, providing a sustained release of nutrients.
- Suitable for a variety of plants including azaleas, hydrangeas, blueberries, and camellias, which thrive in acidic soils.
- Formulated with natural and organic ingredients, Holly-tone features a 4-3-4 nutrient ratio with added sulfur and is environmentally safe.
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#6
5% Off
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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.
#7
38% Off
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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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#8
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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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#9
26% Off
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- Schultz SPF48340 is a slow-release fertilizer
- It comes in a 3.5 lbs (56 ounces) package
- The product is specifically formulated for ACR (Acid-loving plants)
- Provides essential nutrients to support plant growth
- Designed to release nutrients gradually over time
- Easy to use for maintaining healthy soil
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- Schultz SPF48340 is a slow-release fertilizer
- It comes in a 3.5 lbs (56 ounces) package
- The product is specifically formulated for ACR (Acid-loving plants)
- Provides essential nutrients to support plant growth
- Designed to release nutrients gradually over time
- Easy to use for maintaining healthy soil
#10
10% Off
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- Water-soluble fertilizer designed for acid-loving plants
- Provides instant nourishment to plants such as azaleas, hydrangeas, and rhododendrons
- Effective dual feeding action for both roots and leaves
- Begins to take effect immediately
- Available in a convenient 2-pack
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- Water-soluble fertilizer designed for acid-loving plants
- Provides instant nourishment to plants such as azaleas, hydrangeas, and rhododendrons
- Effective dual feeding action for both roots and leaves
- Begins to take effect immediately
- Available in a convenient 2-pack
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