Espoma Organic Holly-Tone 4-3-4 Organic Evergreen & Azalea Plant Food
Best organic fertilizer for gardeners growing acid-loving plants.
Nourish your acid-loving plants with Espoma Organic Holly-tone 4-3-4. This natural and organic plant food is specifically formulated for evergreens, azaleas, rhododendrons, and hydrangeas. Enriched with Bio-tone microbes, it enhances natural plant food for superior growth. Professionals recommend this safe, long-lasting formula, which comes ready to use in an 18lb bag. It's approved for organic gardening, ensuring a healthy and productive environment for your plants. Made in the USA, it provides essential nutrients for vigorous development.
$12.99
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4425
#50 in Fertilizers
Price vs Category Average
-79%
Below average
NPK Ratio
434
/ --
Who it's for
- Busy gardeners preferring low-maintenance feeding schedules
- Gardeners growing acid-loving plants in alkaline soil
- Eco-conscious homeowners with pets or small children
Who should skip it
- Budget-focused gardeners maintaining large-scale landscapes
- Sensitive noses bothered by strong, lingering natural scents
- Gardeners needing rapid growth for severely nutrient-deficient plants
Performance breakdown
Soil Acidification Efficacy
Elemental sulfur content reliably lowers pH for acid-loving plant success.
Nutrient Release Consistency
Slow-release formula provides steady nourishment throughout the growing season.
Microbial Soil Enrichment
Bio-tone microbes actively improve soil health and nutrient uptake efficiency.
Application Convenience
Granular texture allows for straightforward, mess-free distribution around the drip line.
Safety Profile
Organic composition ensures peace of mind for households with pets.
Foliage Vitality Impact
Consistent use promotes noticeably deeper green leaves and more robust blooms.
Key Specs
NPK Ratio
4-3-4
Fertilizer Type
Natural
Form
Granules
Release Type
Slow Release
Container Weight
18 lb
Organic Certified
Yes
Season of Application
Spring, Fall
Target Plant Type
Acid-Loving Plants, Trees and Shrubs
Features
- Top choice for acid-loving plants
- Promotes deep green color and larger blooms
- 100% natural and organic formula
- Long-lasting slow-release nutrients
- Includes elemental sulfur for soil acidification
- Safe for people, pets, and the environment
- Enhanced with humates and beneficial microbes
- Ready to use, no mixing required
What customers say
Customers consistently praise Holly Tone for its exceptional quality and visible results on acid loving plants. Users frequently report dramatic improvements in foliage color and overall plant health, often noting that struggling evergreens and azaleas quickly regain vibrancy. The granular formula is highly valued for its simplicity, making application straightforward even for novice gardeners. This product is widely regarded as a reliable, essential nutrient source that delivers on its organic promise.
Know before you buy
Holly-tone is formulated for acid-loving plants, including azaleas, rhododendrons, hydrangeas, camellias, and evergreens. It is specifically designed to support the soil pH levels these plants require to thrive.
This formula includes elemental sulfur, which naturally helps lower soil pH over time. This creates the acidic environment necessary for plants like azaleas to absorb nutrients efficiently.
For optimal results, apply Holly-tone in the spring and fall. These seasons align with the plant's natural growth cycles, ensuring they receive nutrients when they need them most.
Yes, Holly-tone is a 100% natural and organic formula. It is safe for use in gardens where people and pets spend time, provided you follow the standard application instructions.
No, this is a ready-to-use granular product. You simply sprinkle the granules around the plant's drip line and water the area thoroughly to help the nutrients reach the root zone.
The Bio-tone microbes and humates work to improve soil health and nutrient uptake. By enhancing the biological activity in the soil, they help your plants grow more vigorously and produce larger, more vibrant blooms.
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Ask Hayley anything about this product before you decide.
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$13