Are your boxwoods looking pale, yellowing, or struggling to thrive? Discover the best 10 fertilizers for boxwoods to restore their lush, green glory! Boxwoods are a staple in elegant gardens, but they demand specific nutrients to maintain vibrant foliage and resist environmental stress. With countless products on the market, choosing the right fertilizer can feel overwhelming. This comprehensive guide reviews the top 10 fertilizers for boxwoods, based on Amazon customer ratings, expert insights, and real-world performance, to help you make an informed decision. Equip yourself with the knowledge to promote healthy growth and select the perfect product for your garden.
Why Fertilizing Boxwoods Matters
Boxwoods (Buxus) are prized for their dense, evergreen foliage, making them ideal for hedges, borders, or topiaries. However, nutrient deficiencies can lead to yellowing leaves, stunted growth, or increased susceptibility to pests and diseases like boxwood blight. Proper fertilization ensures lush, healthy shrubs by providing essential nutrients like nitrogen (for foliage growth), phosphorus (for roots), and potassium (for disease resistance). Magnesium and iron are also critical to maintain vibrant green leaves.
Fertilize in early spring to support new growth or late fall to strengthen roots before winter dormancy. Avoid summer applications, as they can stress plants, and never fertilize in winter when boxwoods are dormant. Over-fertilizing can cause leaf burn or sparse growth, so always follow product instructions and test soil pH (ideal: 6.5-7.5) to ensure nutrient absorption. By addressing these needs, you can prevent common issues and maintain boxwood care standards for a thriving garden.
How We Chose the Best Fertilizers for Boxwoods
To identify the best 10 fertilizers for boxwoods, we analyzed Amazon best-sellers and customer reviews from 2024-2025, prioritizing products with 4+ star ratings and 200+ reviews. We cross-referenced expert recommendations from gardening authorities like Espoma, Gardening Know How, and The Spruce, focusing on NPK ratios (e.g., 10-6-4 or balanced 10-10-10) suited for boxwoods. We evaluated organic vs. synthetic options, considering soil health, application ease, and budget. Products were selected for their ability to address nutrient deficiencies, promote lush, healthy shrubs, and prevent issues like yellowing or boxwood blight. Real-world performance was assessed through user feedback on effectiveness and ease of use.
Comparison Table: Top 10 Fertilizers for Boxwoods
| Product | Price (Aug 2025) | Best For |
| TOPBUXUS Boxwood Turbo Grow | $19.22 | English boxwoods, blight prevention |
| Espoma Plant-Tone Organic | Organic gardening, Japanese boxwoods | |
| Miracle-Gro Shake ‘N Feed | $16.87 | Busy gardeners, established shrubs |
| Jobe’s Evergreen Spikes | $14.68 | Container boxwoods, low maintenance |
| Scotts Continuous Release | $25.90 | Consistent feeding, varied climates |
| TreeHelp Premium Fertilizer | $36.95 | Mature boxwoods, specialized care |
| BioAdvanced 12 Month Protect | $28.47 | Pest-prone areas, formal hedges |
| FoxFarm Marine Cuisine | $29.99 | Eco-conscious, stressed boxwoods |
| Lilly Miller Citrus & Avocado | $39.50 | Budget-conscious, Japanese boxwoods |
| Homemade Fertilizer Mix (DIY) | DIY gardeners, small-scale care |
Detailed Reviews: The 10 Best Fertilizers for Boxwoods
1. TOPBUXUS Boxwood Turbo Grow
- Product Description: TOPBUXUS Boxwood Turbo Grow is a professional-grade granular fertilizer tailored specifically for boxwoods, delivering a precise nutrient blend to promote vibrant foliage and robust growth. Its optimized NPK ratio of 13-3-13, combined with micronutrients like magnesium (2.5%), sulfur (9.0%), and calcium (2.0%), supports boxwoods during their three annual growth spurts (April, June, August). This eco-friendly product is designed to prevent and repair yellowing leaves while enhancing resistance to boxwood blight, making it a top choice for serious gardeners. Simply sprinkle granules around the drip line and water thoroughly for immediate nutrient absorption. One pound treats up to 100 square feet, offering economical coverage for hedges or borders.
- Price: $19.22
- Key Features and Benefits:
- NPK: 13-3-13 with essential micronutrients
- Slow-release formula for sustained feeding
- Prevents yellowing and promotes deep green foliage
- Enhances blight resistance, ideal for English boxwoods
- Pros:
- Specifically formulated for boxwoods, reducing guesswork
- Easy application around drip line
- Fast results, with users reporting new growth in weeks
- Pollinator-friendly and eco-conscious
- Cons:
- Expensive for small container size
- Requires gloves to avoid skin irritation
- Amazon Customer Ratings and Reviews: 4.5/5 stars (300+ reviews). Customers praise its effectiveness, with one noting, “My boxwoods went from yellow to lush green in a month!” Some criticize the small container size, calling it “overpriced for the quantity.”
- Why It’s a Good Choice: TOPBUXUS is a premium, targeted solution for boxwood-specific needs, delivering professional results for vibrant, healthy shrubs.
- Ideal Use Case: Best for established English boxwoods needing a nutrient boost or blight prevention in warm, humid climates.
2. Espoma Plant-Tone Organic Fertilizer
- Product Description: Espoma Plant-Tone is a trusted organic fertilizer with a 5-3-3 NPK ratio, ideal for eco-conscious gardeners seeking sustainable boxwood care. Its Bio-tone formula includes natural ingredients like feather meal, bone meal, and alfalfa meal, which enrich soil with microbes to improve water retention and root health. This slow-release fertilizer provides steady nutrition, making it gentle on sensitive Japanese or English boxwoods. Apply 1 cup per foot of shrub width around the drip line, water thoroughly, and watch your boxwoods thrive over time. Its 8-pound bag offers excellent value for larger gardens or multiple shrubs.
- Price:
- Key Features and Benefits:
- NPK: 5-3-3, organic and slow-release
- Enhances soil microbial activity for long-term health
- Promotes strong roots and vibrant foliage
- Safe for eco-friendly gardening
- Pros:
- Affordable for large-scale use
- Improves soil structure and water retention
- Gentle formula prevents burn
- Cons:
- Lower nitrogen content may yield slower results
- Mild odor during application
- Amazon Customer Ratings and Reviews: 4.7/5 stars (500+ reviews). Users love its organic composition and soil benefits, with one stating, “My Japanese boxwoods are thriving!” Some note slower green-up compared to synthetic options.
- Why It’s a Good Choice: Its organic, slow-release formula supports long-term soil health, making it perfect for sustainable boxwood care.
- Ideal Use Case: Ideal for organic gardeners maintaining Japanese or English boxwoods in zones 6-8.
3. Miracle-Gro Shake ‘N Feed Flowering Trees and Shrubs
- Product Description: Miracle-Gro Shake ‘N Feed is a versatile slow-release granular fertilizer designed for evergreens like boxwoods, delivering nutrients for up to 3 months. With a 12-4-8 NPK ratio and added micronutrients like iron and magnesium, it promotes dense foliage, strong roots, and disease resistance. Its convenient shake-and-apply design simplifies feeding, making it ideal for busy gardeners. Spread evenly around the drip line, water well, and enjoy vibrant boxwoods with minimal effort. The 8-pound bag covers large areas, offering excellent value for established shrubs or hedges.
- Price: $16.87
- Key Features and Benefits:
- NPK: 12-4-8 with micronutrients
- Feeds for up to 3 months
- Easy-to-use shake applicator
- Prevents leaf scorch and promotes green-up
- Pros:
- Long-lasting feeding reduces application frequency
- Boosts root and foliage development
- Suitable for in-ground and container plants
- Cons:
- Slight fishy odor during application
- Synthetic formula may not suit organic gardeners
- Amazon Customer Ratings and Reviews: 4.6/5 stars (2,000+ reviews). Customers praise its ease of use and results, with one saying, “My boxwoods look fuller and greener!” Some dislike the odor.
- Why It’s a Good Choice: Balances convenience and performance, delivering consistent results for vibrant boxwood growth.
- Ideal Use Case: Best for busy gardeners needing low-maintenance fertilization for established boxwoods in varied climates.
4. Jobe’s Evergreen Fertilizer Spikes
- Product Description: Jobe’s Evergreen Fertilizer Spikes are pre-measured, slow-release spikes designed for evergreens like boxwoods, delivering targeted nutrition directly to the root zone. With a 13-3-4 NPK ratio, these spikes provide a high dose of nitrogen to promote lush, green foliage, alongside phosphorus and potassium for root and overall plant health. The spikes are inserted into the soil near the drip line, releasing nutrients gradually over 2 months with each watering or rainfall. This mess-free, no-runoff solution is perfect for container-grown or small-scale boxwood plantings, ensuring consistent feeding without the risk of over-application. The 15-spike pack treats multiple shrubs, offering excellent value for small gardens.
- Price: $14.68
- Key Features and Benefits:
- NPK: 13-3-4, high nitrogen for foliage growth
- Slow-release spikes feed for up to 2 months
- No-runoff design delivers nutrients directly to roots
- Easy insertion near drip line
- Pros:
- Hassle-free, pre-measured application
- Budget-friendly for small gardens
- High nitrogen promotes dense, green foliage
- Cons:
- Not ideal for large hedges due to limited coverage
- Lacks some micronutrients like magnesium
- Amazon Customer Ratings and Reviews: 4.5/5 stars (1,200+ reviews). Users appreciate the simplicity, with one stating, “Perfect for my potted boxwoods—green and thriving!” Some report uneven nutrient distribution in larger plants.
- Why It’s a Good Choice: Jobe’s spikes offer a low-maintenance, targeted solution for small-scale boxwood care, ensuring steady nutrition without the mess of granular fertilizers.
- Ideal Use Case: Perfect for container-grown boxwoods or small hedges where ease of use and affordability are priorities.
5. Scotts Continuous Release Evergreen Fertilizer
- Product Description: Scotts Continuous Release Evergreen Fertilizer is a granular, slow-release fertilizer crafted for evergreens like boxwoods, providing balanced nutrition for up to 2 months. Its 11-7-7 NPK ratio, enriched with sulfur and iron, supports healthy roots, vibrant foliage, and resistance to environmental stress. Designed to minimize leaf scorch, this gentle formula is applied by broadcasting granules around the drip line on moist soil or mulch, followed by thorough watering. The 3-pound bag is compact yet effective for small to medium gardens, making it a reliable choice for consistent boxwood care in varied climates.
- Price:$25.90
- Key Features and Benefits:
- NPK: 11-7-7 with sulfur and iron
- Feeds for up to 2 months
- Gentle formula reduces risk of fertilizer burn
- Suitable for indoor and outdoor boxwoods
- Pros:
- Balanced nutrients for comprehensive care
- Enhances foliage color and root strength
- Works in diverse climates
- Cons:
- Smaller bag size compared to competitors
- Synthetic, not ideal for organic gardeners
- Amazon Customer Ratings and Reviews: 4.6/5 stars (800+ reviews). Users report lush growth, with one saying, “My boxwoods are fuller and greener than ever.” Some find the price high for the quantity.
- Why It’s a Good Choice: Scotts offers reliable, consistent feeding for lush, healthy shrubs without the risk of overfertilizing, perfect for gardeners seeking dependable results.
- Ideal Use Case: Great for gardeners maintaining established boxwoods in varied climates, especially in regions with sandy or nutrient-poor soils.
6. TreeHelp Premium Fertilizer for Boxwood
- Product Description: TreeHelp Premium Fertilizer for Boxwood is a specialized granular fertilizer formulated to promote long-term vitality in boxwoods through robust root development and enhanced disease resistance. While the exact NPK ratio is a custom blend (not disclosed), it features slow-release nitrogen and key micronutrients tailored for boxwoods, ensuring steady feeding throughout the growing season. Apply by broadcasting around the drip line, ideally on mulched, moist soil, to prevent root burn. One 3.3-pound bag treats one mature tree or 2-3 smaller plants, making it a premium choice for targeted boxwood care.
- Price: $36.95
- Key Features and Benefits:
- Custom blend with slow-release nitrogen
- Promotes root development and disease resistance
- Treats one mature or 2-3 small boxwoods
- Made in the USA with high-quality ingredients
- Pros:
- Specifically designed for boxwood health
- Enhances root and foliage vitality
- Easy to apply with clear instructions
- Cons:
- Lack of NPK transparency may concern some buyers
- Higher cost per pound compared to larger bags
- Amazon Customer Ratings and Reviews: 4.4/5 stars (200+ reviews). Users note improved shrub health, with one stating, “My boxwoods look revitalized!” Some report slower results, suggesting early application is key.
- Why It’s a Good Choice: Its targeted formula makes it ideal for boxwood enthusiasts seeking premium, specialized nutrition for lush, healthy shrubs.
- Ideal Use Case: Best for mature boxwoods or small plantings needing specialized care, especially in areas prone to nutrient deficiencies.
7. BioAdvanced 12 Month Tree and Shrub Protect and Feed
- Product Description: BioAdvanced 12 Month Tree and Shrub Protect and Feed is a dual-action granular fertilizer and insect protectant, ideal for boxwoods in pest-prone areas. With a 2-1-1 NPK ratio, it provides slow-release nutrients to support foliage and root growth, while its systemic insecticide (imidacloprid) protects against pests like leafminers and aphids for up to 12 months. Apply granules around the drip line, water thoroughly, and enjoy long-lasting protection and nutrition. The 4-pound bag is sufficient for multiple shrubs, making it a versatile choice for formal hedges or landscapes.
- Price: $28.47
- Key Features and Benefits:
- NPK: 2-1-1 with systemic insect protection
- 12-month pest control and slow-release feeding
- Promotes vibrant foliage and strong roots
- Easy granular application
- Pros:
- Combines fertilization and pest control
- Long-lasting effects reduce maintenance
- Effective against common boxwood pests
- Cons:
- Low nutrient concentration requires supplemental feeding
- Synthetic formula, not suitable for organic gardening
- Amazon Customer Ratings and Reviews: 4.5/5 stars (1,500+ reviews). Customers value the pest protection, with one noting, “No leafminers this year, and my boxwoods are thriving!” Some wish for higher nutrient levels.
- Why It’s a Good Choice: Its unique pest-and-feed combo offers comprehensive boxwood care, protecting shrubs while promoting healthy growth.
- Ideal Use Case: Ideal for boxwoods in pest-prone areas or formal hedges requiring both nutrition and insect protection.
8. FoxFarm Marine Cuisine Fertilizer
- Product Description: FoxFarm Marine Cuisine is an organic, slow-release granular fertilizer with a 10-7-7 NPK ratio, featuring marine-based ingredients like crab and shrimp meal to revitalize stressed or yellowing boxwoods. Enriched with calcium and magnesium, it supports soil microbial activity and enhances nutrient uptake, promoting lush foliage and strong roots. Apply by broadcasting around the drip line, ideally on moist soil, and water well to activate. The 4-pound bag is perfect for eco-conscious gardeners seeking sustainable boxwood care for small to medium gardens.
- Price: $29.99
- Key Features and Benefits:
- NPK: 10-7-7, organic with marine-based ingredients
- Boosts soil microbial activity for long-term health
- Contains calcium and magnesium for green foliage
- Suitable for multiple plant types
- Pros:
- Organic and eco-friendly
- Revitalizes stressed or yellowing boxwoods
- Enhances soil structure and nutrient uptake
- Cons:
- Strong fishy odor during application
- Higher price point than some competitors
- Amazon Customer Ratings and Reviews: 4.6/5 stars (400+ reviews). Users praise its organic results, with one saying, “My boxwoods went from dull to vibrant!” Some note the odor as a drawback.
- Why It’s a Good Choice: Its natural ingredients and soil-enhancing properties make it a top pick for revitalizing stressed boxwoods while supporting sustainable gardening.
- Ideal Use Case: Best for eco-conscious gardeners with yellowing or weak boxwoods needing organic restoration.
9. Lilly Miller Citrus & Avocado Food
- Product Description: Lilly Miller Citrus & Avocado Food is a natural granular fertilizer with a 10-6-4 NPK ratio, ideal for boxwoods requiring a nitrogen boost to combat yellowing. Enriched with iron and other minerals, it enhances foliage color and supports healthy growth in harsh conditions. Apply by broadcasting around the drip line on moist soil or mulch, followed by thorough watering to ensure nutrient absorption. The 4-pound bag offers excellent value for budget-conscious gardeners, delivering effective results for Japanese or English boxwoods in various climates.
- Price: $39.50
- Key Features and Benefits:
- NPK: 10-6-4 with iron for vibrant foliage
- Natural formula supports healthy growth
- Affordable and widely available
- Suitable for multiple boxwood varieties
- Pros:
- Budget-friendly and effective
- Enhances green color and prevents yellowing
- Easy to apply with minimal odor
- Cons:
- Not slow-release, requiring more frequent applications
- Limited micronutrient profile compared to premium options
- Amazon Customer Ratings and Reviews: 4.4/5 stars (300+ reviews). Users appreciate its affordability and color enhancement, with one noting, “My boxwoods are greener than ever!” Some prefer slow-release formulas for less frequent use.
- Why It’s a Good Choice: Its affordability and effectiveness make it a practical choice for vibrant boxwood care on a budget.
- Ideal Use Case: Ideal for cost-conscious gardeners with Japanese boxwoods needing a quick nutrient boost.
10. Homemade Fertilizer Mix (DIY Option)
- Product Description: This homemade fertilizer mix combines coffee grounds, banana peels, and eggshells to create a natural, cost-free solution for boxwood care. Coffee grounds provide nitrogen for foliage growth, banana peels supply potassium for disease resistance, and eggshells offer calcium to strengthen plant cells. To prepare, dry and crush eggshells, chop banana peels, and mix with used coffee grounds in a 1:1:1 ratio. Spread the mixture around the drip line, cover with compost or mulch, and water well. This DIY option is sustainable and customizable, perfect for small-scale gardeners with time to prepare.
- Price:
- Key Features and Benefits:
- NPK: Varies (high nitrogen, potassium, calcium)
- Organic and sustainable, using household waste
- Improves soil texture and microbial activity
- Customizable based on boxwood needs
- Pros:
- Free and eco-friendly
- Enhances soil health and root development
- Safe for all boxwood varieties
- Cons:
- Requires time and effort to prepare
- Inconsistent nutrient ratios may affect results
- Amazon Customer Ratings and Reviews: N/A; based on gardening community feedback (e.g., FarmTilling). Users report improved growth with regular use, though results vary due to inconsistent nutrient delivery.
- Why It’s a Good Choice: Perfect for DIY gardeners seeking a chemical-free, sustainable option for lush, healthy shrubs.
- Ideal Use Case: Best for small-scale, eco-conscious gardeners with time to prepare and monitor boxwood health.
How to Choose the Right Fertilizer for Your Boxwoods
- Factors to Consider:
- Boxwood Type: Japanese boxwoods (Buxus microphylla) tolerate lower nitrogen, while English boxwoods (Buxus sempervirens) benefit from higher doses. Green Mountain hybrids need balanced nutrients.
- Soil Conditions: Test soil pH (ideal: 6.5-7.5) and nutrient levels using a kit from Amazon or a local cooperative extension. Adjust with lime (low pH) or sulfur (high pH) as needed.
- Organic vs. Synthetic: Organic options (e.g., Espoma, FoxFarm) improve soil health long-term, while synthetics (e.g., Miracle-Gro, Scotts) offer quick green-up.
- Application Ease: Granular fertilizers (e.g., TOPBUXUS) are versatile, spikes (e.g., Jobe’s) suit containers, and liquids (avoided here) risk burn.
- Budget: Prices range from $0 (DIY) to $29.99 (TOPBUXUS). Consider coverage area and frequency of application.
- Tips for Application:
- Apply near the drip line, not directly on roots or foliage, to prevent burn.
- Water thoroughly after application to activate nutrients.
- Avoid overfertilizing; follow package instructions or soil test recommendations.
- Apply in spring (March-April) for growth or late fall (October-November) for roots. Avoid summer or winter applications.
- Additional Notes: For pest-prone areas, consider BioAdvanced for dual protection. For organic gardens, Espoma or FoxFarm are top choices. Always store fertilizers away from pets and children, and wear gloves during application.
FAQs About Boxwood Fertilizers
- When should I fertilize my boxwoods?
Fertilize in early spring (March-April) for foliage growth or late fall (October-November) for root development. Avoid summer or winter to prevent stress or burn. - Can I use acid-loving plant fertilizers for boxwoods?
No, boxwoods prefer neutral soil (pH 6.5-7.5), unlike acid-loving plants like azaleas. Use balanced or nitrogen-rich fertilizers like 10-6-4 or 10-10-10. - How do I prevent fertilizer burn?
Apply granules on moist soil or mulch, avoid contact with roots/leaves, and water thoroughly. Use slow-release formulas and follow package instructions. - What’s the best fertilizer for boxwood blight?
TOPBUXUS Boxwood Turbo Grow and BioAdvanced Protect and Feed are effective, as they enhance plant vigor and offer pest/disease resistance. Regular foliar treatments like TOPBUXUS Restore & Protect can also help.
Conclusion
The best 10 fertilizers for boxwoods offer tailored solutions for lush, healthy shrubs, from premium options like TOPBUXUS Boxwood Turbo Grow to budget-friendly choices like Lilly Miller and DIY mixes. Whether you prioritize organic formulas (Espoma, FoxFarm), ease of use (Jobe’s Spikes, Miracle-Gro), or pest protection (BioAdvanced), there’s a product to suit your needs. Test your soil, consider your boxwood variety, and choose a fertilizer that aligns with your budget and gardening style. Shop these top picks on Amazon for convenience and start