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10 Best Tree Fertilizers 2025 in the United States
#1
Winner
Osmocote 14-14-14 Classic Slow Release Fertilizer - 50 Lbs.
The Osmocote 14-14-14 Classic Slow Release Fertilizer offers a balanced N-P-K ratio of 14-14-14, which is suitable for a variety of trees and plants, providing equal amounts of nitrogen, phosphorus, and potassium. This ensures comprehensive nutrient support for healthy growth. One of its standout features is its slow-release formula, which feeds plants gradually over 3 to 4 months, reducing the need for frequent reapplications and thereby saving time and effort for users.
#2
BioAdvanced 12 Month Tree and Shrub Insect Control Landscape Formula, Concentrate, 1 Gal
The BioAdvanced 701525A 12-Month Shrub Control Insect Killer and Tree Fertilizer is a unique product that combines insect control with fertilization, making it particularly beneficial for gardeners looking to protect their trees and shrubs from pests while also promoting their growth. With a slow-release formula, it enhances the health of plants over time, which is a strong point for those who prefer less frequent applications. The systemic protection feature ensures that the treatment penetrates the entire plant, providing comprehensive defense against harmful insects like Japanese Beetles and Emerald Ash Borers.
Rating
8.2
Application Frequency
Most important from
406 reviews
#3
Dr. Earth Natural Wonder Fruit Tree Fertilizer 25 lb
Dr. Earth Natural Wonder Fruit Tree Fertilizer is a popular choice for those seeking an organic solution for their fruit trees. One of its major strengths is its commitment to non-GMO and organic standards, being the only Non-GMO Project Verified fertilizer in the U.S.A. It's crafted from high-grade ingredients, ensuring it's safe for people and pets, and free from synthetic chemicals. This makes it particularly appealing to eco-conscious gardeners.
Rating
7.6
Organic vs. Synthetic
Most important from
754 reviews
Top 10 Best Tree Fertilizers 2025 in the United States
#1
Winner
Osmocote 14-14-14 Classic Slow Release Fertilizer - 50 Lbs.
Osmocote 14-14-14 Classic Slow Release Fertilizer - 50 Lbs.
N-P-K Ratio: 14-14-14
Type of Fertilizer: Slow Release
Organic vs. Synthetic: Synthetic
Application Frequency: Every 3 to 4 months
Chosen by 1366 this week
BioAdvanced 12 Month Tree and Shrub Insect Control Landscape Formula, Concentrate, 1 Gal
BioAdvanced 12 Month Tree and Shrub Insect Control Landscape Formula, Concentrate, 1 Gal
Type of Fertilizer: Tree Fertilizer
Organic vs. Synthetic: Synthetic
Application Frequency: 12 months
Dr. Earth Natural Wonder Fruit Tree Fertilizer 25 lb
Dr. Earth Natural Wonder Fruit Tree Fertilizer 25 lb
Type of Fertilizer: Fruit Tree Fertilizer
Organic vs. Synthetic: Organic
Micronutrients: multi-minerals, proteins, carbohydrates, humic acids
10-10-10 Plant Fertilizer Slow Release - 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (1/2 Quart)
10-10-10 Plant Fertilizer Slow Release - 10 10 10 All Purpose Granular Garden Fertilizer for Vegetables, Tomato, Arborvitae, Shrubs, Rose, Flowers, Fruit, Fig Trees (1/2 Quart)
N-P-K Ratio: 10-10-10
Type of Fertilizer: slow-release granular
Organic vs. Synthetic: synthetic
Application Frequency: twice per season for gardens
GARDENWISE Professional Citrus Fertilizer + Vital Micronutrients; Perfect Balanced NPK for All Citrus; for Indoor and Outdoor Plants; Orange, Lime, Avocado and Lemon Tree Fertilizer (2 QUARTS)
GARDENWISE Professional Citrus Fertilizer + Vital Micronutrients; Perfect Balanced NPK for All Citrus; for Indoor and Outdoor Plants; Orange, Lime, Avocado and Lemon Tree Fertilizer (2 QUARTS)
N-P-K Ratio: 6-4-6
Type of Fertilizer: granular, slow-release coating
Organic vs. Synthetic: synthetic
Micronutrients: magnesium, zinc, copper, iron, boron
Application Frequency: less frequent, slow-release coating
Related Products
Up to 10% off
Espoma Organic Chicken Manure 25 lb. Bag. All Natural & Organic Fertilizer for All Flowers, Vegetables, Trees, and Shrubs. for Organic Gardening - 2 Pack
Espoma Organic Chicken Manure 25 lb. Bag. All Natural & Organic Fertilizer for All Flowers, Vegetables, Trees, and Shrubs. for Organic Gardening - 2 Pack
N-P-K Ratio: 5-3-2
Type of Fertilizer: Chicken Manure
Organic vs. Synthetic: Organic
Micronutrients: 8% calcium
Application Frequency: Spring, fall trees; monthly flowers, veg
BioAdvanced 12 Month Tree and Shrub Fertilizer, Protect & Feed Concentrate, 64 oz, Insect Killer and Plant Food
BioAdvanced 12 Month Tree and Shrub Fertilizer, Protect & Feed Concentrate, 64 oz, Insect Killer and Plant Food
Type of Fertilizer: Concentrate
Application Frequency: Annual application
Miracle-Gro Tree and Shrub Plant Food Spikes, For Deciduous, Flowering and Evergreen Trees, Hydrangeas, and Acid-Loving Plants, 12 Spikes
Miracle-Gro Tree and Shrub Plant Food Spikes, For Deciduous, Flowering and Evergreen Trees, Hydrangeas, and Acid-Loving Plants, 12 Spikes
Type of Fertilizer: Spikes
Organic vs. Synthetic: Synthetic
Application Frequency: Twice a year
Soil pH Compatibility: For acid-loving plants
Jobe’s Slow Release Tree and Shrub Fertilizer Spikes, Easy Plant Care for Oak, Maple, Dogwood, Boxwood, and Many More Acid Loving Trees and Shrubs, 9 Count
Jobe’s Slow Release Tree and Shrub Fertilizer Spikes, Easy Plant Care for Oak, Maple, Dogwood, Boxwood, and Many More Acid Loving Trees and Shrubs, 9 Count
N-P-K Ratio: 15-3-3
Type of Fertilizer: Slow release tree and shrub spikes
Organic vs. Synthetic: Synthetic
Application Frequency: Twice yearly
Soil pH Compatibility: For acid-loving plants
#10
BioAdvanced 12 Month Tree and Shrub Fertilizer, Protect & Feed Granules, 10 lb, Insect Killer and Plant Food
BioAdvanced 12 Month Tree and Shrub Fertilizer, Protect & Feed Granules, 10 lb, Insect Killer and Plant Food
Type of Fertilizer: slow-release, granule-based
Organic vs. Synthetic: Synthetic
Application Frequency: year-long feeding, one application
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Buying Guide for the Best Tree Fertilizers
Choosing the right tree fertilizer is crucial for ensuring the healthy growth and development of your trees. Fertilizers provide essential nutrients that trees need to thrive, and selecting the right one can make a significant difference in the health and appearance of your trees. When picking a tree fertilizer, it's important to consider several key specifications to ensure you are providing the best possible care for your trees.N-P-K RatioThe N-P-K ratio represents the percentage of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer. These are the primary nutrients that trees need. Nitrogen promotes leaf and stem growth, phosphorus supports root development and flowering, and potassium enhances overall health and disease resistance. For young trees, a higher nitrogen content (e.g., 10-10-10) is beneficial for growth. For mature trees, a balanced or lower nitrogen ratio (e.g., 5-10-10) is better to support root and fruit development. Choose the N-P-K ratio based on the age and type of tree you are fertilizing.
Type of FertilizerFertilizers come in various forms, including granular, liquid, and spikes. Granular fertilizers are easy to apply and provide a slow release of nutrients over time, making them ideal for long-term feeding. Liquid fertilizers offer quick nutrient absorption and are suitable for immediate nutrient needs. Fertilizer spikes are convenient and provide a steady release of nutrients directly to the root zone. Consider the ease of application and the specific needs of your trees when choosing the type of fertilizer.
Organic vs. SyntheticOrganic fertilizers are made from natural materials and release nutrients slowly, improving soil health over time. They are environmentally friendly and safe for use around children and pets. Synthetic fertilizers are chemically manufactured and provide a quick release of nutrients, which can be beneficial for immediate results. However, they may not improve soil health in the long term. If you prefer a more sustainable approach, opt for organic fertilizers. If you need rapid results, synthetic fertilizers may be more suitable.
MicronutrientsIn addition to the primary nutrients (N-P-K), trees also require micronutrients such as iron, manganese, zinc, and copper for optimal growth. These micronutrients are often included in fertilizers in small amounts. Check the fertilizer label to ensure it contains the necessary micronutrients, especially if your soil is deficient in any of them. If your trees show signs of nutrient deficiencies, such as yellowing leaves or stunted growth, a fertilizer with added micronutrients can help address these issues.
Application FrequencyDifferent fertilizers have varying application frequencies, ranging from once a year to several times a season. Slow-release fertilizers typically require less frequent applications, while liquid fertilizers may need to be applied more often. Consider your schedule and the level of maintenance you are willing to commit to when choosing a fertilizer. If you prefer low-maintenance care, opt for a slow-release fertilizer that requires fewer applications.
Soil pH CompatibilitySoil pH affects nutrient availability to trees. Some fertilizers are formulated to work best within specific pH ranges. Test your soil pH before selecting a fertilizer to ensure compatibility. Most trees prefer a slightly acidic to neutral pH (6.0-7.0). If your soil pH is outside this range, choose a fertilizer that can help adjust the pH or consider amending the soil to achieve the desired pH level.