Old Cobblers Farm™ Wicked Organics Fruit Tree Fertilizer

Old Cobblers Farm™ Wicked Organics Fruit Tree Fertilizer — 10-2-8 Slow-Release Blend for Healthy Fruit Trees

Give your orchard or backyard fruit trees everything they need with Wicked Organics 10-2-8 Organic Fruit Tree Fertilizer. Formulated specifically for both young and mature fruit trees, this slow-release, fully organic blend supports everything from root establishment to abundant flowering and fruit set. If you’ve searched for “organic fertilizer for fruit trees,” “best fertilizer to increase fruit production,” or “slow release fertilizer for fruit and flowering trees,” this is made for you.

Key Features & Nutrient Profile

Balanced NPK: 10-2-8
• Total Nitrogen (N): 10.00% — with approximately 9.00% of that in water-insoluble (slow-release) form to provide steady growth without spikes.
• Available Phosphate (P₂O₅): 2.00% for early root development, blossom formation, and supporting strong fruit set.
• Soluble Potash (K₂O): 8.00% to improve fruit size, color, firmness, and enhance tolerance to heat, drought, and stress.

Added Secondary Nutrients: Contains Calcium (~1.80%) and Sulfur (~3.00%) to support cell wall strength, metabolic functions, and overall tree health.

Natural Sources: Ingredients include feather meal, meat & bone meal, blood meal, and sulfate of potash — all organic inputs that feed the soil and sustain tree health season after season.

Why This Fertilizer Works — Backed by Gardening Science

Organic fertilizers release nutrients gently compared to synthetics, reducing risk of root burn and supporting more consistent growth. Stark Bros’s guide emphasizes that organic options are gentler and slowly decompose over time, feeding fruit trees at a more consistent rate. 

Timely fertilization in early spring (before bud break) boosts flower formation and fruit set, while a second feeding after fruit set helps maintain tree vigor without stimulating overly tender new growth. 
 

Fruit trees need balanced nutrition: nitrogen for foliage and growth; phosphorus for roots, blooms, and fruit set; potassium for fruit quality, color, and disease resistance. Organic and slow release blends help maintain this balance. 
 

Key Benefits for Fruit Trees

Season-long Nutrition: Steady, slow-release nitrogen helps avoid leaf burn and leaching; nourishes trees from early growth through harvest.

Improved Flowering & Fruit Set: The phosphorus component helps with blossom development, root strength, and better fruit production.

Enhanced Fruit Quality: Higher potassium supports flavor, color, sugar content (brix), and firmness in apples, citrus, stone fruits, etc.

Healthy Root Systems & Soil Biology: Organic meals feed soil microbes, improving nutrient cycling, moisture retention, and long-term tree health.

Ideal for All Tree Stages: Works well with newly planted fruit trees and mature, bearing trees — especially helpful right after pruning or during early bud swell.

Application Guidelines

How Much to Use: Approx. 5-10 lbs per 1,000 sq. ft., or 1-2 lbs per inch of trunk diameter — spread evenly under the drip line where feeder roots are most active.

When to Apply: Early spring (before bud break) is best; reapply mid-season after fruit set for sustained support.

Watering/Soil Incorporation: Lightly incorporate into topsoil or mulch, ensure watering after application to move nutrients to root zone; avoid contact with trunk bark.

Avoid Late Season Over-Fertilization: Applying fertilizer too late in the season can cause tender shoots that may be damaged by frost or reduced hardening off. Guides recommend stopping or reducing nitrogen application mid to late summer. 

Why Choose This Fruit TreeFertilizer?

Old Cobblers Farm™ Wicked Organics Fruit Tree Fertilizer 10-2-8 is a slow-release organic blend specially crafted to nourish fruit trees throughout the growing season, promoting strong roots, steady growth, and flavorful harvests. With 10% nitrogen for lush foliage, 2% phosphorus to support root establishment, and 8% potassium to improve fruit quality and stress tolerance, this biologically active formula helps apple, pear, and stone fruit trees produce more uniform fruit with better flavor, color, and yield. Citrus trees such as lemon, orange, and lime benefit from denser foliage, increased blossoms, and richer fruit color with larger harvests, while young, newly planted trees establish roots quickly, grow stronger, and suffer less transplant stress. Mature fruit trees fed with this blend maintain productivity, deliver consistently high fruit quality, and build greater resilience against heat, drought, and environmental stress, ensuring long-term orchard health and abundant, flavorful harvests.