10 Best Tree Fertilizers 2026 in the United States

Farmer's Secret Fruit Tree Booster Fertilizer is specifically crafted for fruit trees, offering a super concentrated formula that emphasizes phosphorus, a crucial element for early growth and fruit development. Its application is straightforward—mixing a small amount with water—making it convenient for both amateur and experienced gardeners. Its concentrated nature means that a little product goes a long way, which is efficient for those with numerous trees or large orchards.

The fertilizer is suitable for a variety of fruit trees, including peach, banana, and apple, and is ideal for use from the end of dormancy to the budding phase, ensuring vital nutrition during these critical periods. One of its strengths is the tailored application frequency, recommending different amounts for young versus mature trees. This flexibility helps cater to different growth stages and tree needs, which can optimize tree health and fruit yield.

Produced and bottled in Kentucky, the fertilizer reflects a commitment to quality that is backed by scientific development processes commonly accessible to professional farmers. For users looking for a robust fertilizer that supports fruit tree growth efficiently, Farmer's Secret provides a significant advantage in terms of concentrated formula and ease of use.

This 10-10-10 slow-release granular fertilizer offers a balanced mix of nitrogen, phosphorus, and potassium, making it a versatile choice for a variety of trees like fruit trees, evergreens, oaks, and shrubs. Its slow-release formula feeds plants steadily for up to eight weeks, reducing how often you need to apply it—usually twice per growing season for gardens and three times annually for trees and shrubs. This can save effort while supporting healthy root development, vibrant leaves, and overall plant resilience.

The fertilizer granules are easy to spread evenly across outdoor soil, which helps ensure good nutrient absorption. It also contains quick-release nitrogen for a fast growth boost alongside the slow feeding effect. One downside is it’s a synthetic product, so if you prefer organic options, this wouldn’t fit that preference. The 10-10-10 ratio is well-rounded but may not be ideal if your trees need targeted nutrients at certain growth stages.

This fertilizer performs well for general tree and garden feeding with minimal fuss, especially if you want a balanced nutrient supply and less frequent application. However, organic gardeners or those needing special soil adjustments might want to look for products with added micronutrients or pH-specific formulations.

Espoma Organic Chicken Manure is a natural, organic fertilizer designed for a variety of plants including trees, shrubs, flowers, and vegetables. Its N-P-K ratio of 5-3-2 provides moderate nitrogen, phosphorus, and potassium, supporting steady growth without overwhelming the plant. Made from dehydrated chicken manure, it offers beneficial organic matter and an added 8% calcium, which strengthens plant cell walls and improves soil structure.

Being organic and heat-treated, it is safe and free from harmful chemicals, making it ideal for organic gardening. The granulated form makes it easy to apply, typically in spring and fall for trees and shrubs, and monthly for flowers and vegetables during the growing season. Organic chicken manure generally works well in a wide range of soils, though it provides gentle nutrient levels that may not meet urgent nutrient needs or specific soil deficiencies.

Regular watering after application is necessary to help nutrients reach the roots. This product is well-suited for gardeners seeking a natural, environmentally safe fertilizer that improves soil health over time rather than delivering instant nutrient spikes.