Old Cobblers Farm™ Wicked Organics 4-3-3 Fertilizer – Trees, Shrubs, Perennials

Premium All-Round Care for Trees, Shrubs & Perennials

Give your garden’s backbone the nutrients it deserves with Old Cobblers Farm™ Wicked Organics 4-3-3 Fertilizer — specially formulated for trees, shrubs, and perennials that need balanced feeding. If you’ve been searching for “organic fertilizer for flowering shrubs,” “fertilizer to boost shrub growth and flowering,” or “slow-release fertilizer safe for trees,” this 4-3-3 blend is what gardeners trust for long-lasting health and vibrant foliage.

Guaranteed Analysis & What It Delivers

Nutrients (N-P-K = 4-3-3): Provides a balanced ratio of nitrogen for leafy growth, phosphate for root development and flower/fruit set, and potash for overall strength and resilience.

Slow-release performance: Designed to provide sustained feeding without pushing overly lush, weak growth that can make shrubs and perennials more vulnerable to pests, weather, or stress.

Why Trees, Shrubs & Perennials Love This Fertilizer

Strong, deep root development: Ensures perennials and woody plants can absorb moisture and nutrients better, improving drought tolerance and stability.

Improved flowering and bloom longevity: The phosphate content helps with bud formation and more abundant flowering, while potash improves bloom colour and durability.

Fuller foliage, healthier leaves: Enough nitrogen to support green, lush growth without encouraging weak, brittle shoots.

Less transplant shock: When planting new shrubs or trees, this balanced formula supports a gentler transition.

Soil health boost: Organic base helps support soil microbes and improve soil structure — which is essential for long-term garden and landscape health.

Backed by Best Practices & Research

According to extension services, fertilizing trees and shrubs with a balanced organic fertilizer helps stimulate growth and improve the color and appearance of plants, particularly for young shrubs or landscape beds. 

Also, tree & shrub nutrition guides emphasize that excess nitrogen without enough phosphorous or potassium can lead to weak growth; balanced fertilizers (such as 4-3-3) help avoid this imbalance. 

Best For These Plants & Situations

Flowering shrubs (roses, hydrangeas, azaleas, gardenias) where bloom size, flower count and colour matter

Ornamental perennials that return every year, such as peonies, daisies, hostas

Shade & specimen trees, young or established, needing consistent but safe feeding

Mixed landscape beds where you have a combination of shrubs, perennials, ground covers — when you want one product that serves all with minimal risk of burning or overdoing leafy growth

New plantings, transplanting, and gardening in soils that are somewhat depleted or have had heavy use

Application Guide & Timing Tips

When to apply: Early spring (just as plants are coming out of dormancy) and mid-season or early summer to support flowering and foliage; an optional slight feeding late summer for long-blooming perennials.

How much: Apply as per soil test or planting guidelines: spread evenly under the canopy or over the root zone of shrubs and trees; for perennials, you can side-dress around the base. Avoid direct contact with stems or trunk.

Watering: Always water in after application, especially for slow-release fertilizers — ensures nutrients move into root zone. Mulching helps retain moisture and protect soil microbes.

Avoid over-fertilization: Too much nitrogen can lead to weak, lush growth that is more vulnerable to pests and winter damage. Use balanced fertilizer like this 4-3-3 to maintain proportion among N, P, and K. Research in extension literature supports this. 

Key Benefits You’ll Notice

More vibrant, lush foliage (greener leaves, fuller shrub shape)

Longer, more frequent flowering and better bloom colour

Stronger growth without weak, overly soft shoots

Healthier root systems—better drought resistance, stability, and resilience

Soil that gradually improves, better structure, more biotic activity