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Sheep vs. Cow Manure for Apple Orchards: Nutrient Profiles and Fire Blight Risk

A grower switched from cow to sheep manure in an apple orchard and wants a nutrient comparison.

Key Differences

Factor	Cow Manure	Sheep Manure
Nitrogen (N)	Higher	Lower
Phosphorus (P) & Potassium (K)	Moderate	Higher
Cost	Higher	Lower
Weed Seeds	Fewer	More

Why Sheep Manure Wins for Apples

Excess nitrogen predisposes apples to fire blight (Erwinia amylovora) and promotes vegetative growth over fruiting. Sheep manure’s lower N + higher P/K encourages flower bud formation and fruit quality. Weed seeds are irrelevant under trees—mow or mulch them.

Apply aged sheep manure in late fall or early spring at 2–3 inches, kept 6" from trunks. It’s the economical, disease-smart choice.

Plant Diseases: Sheep Manure for Apple Trees: Low Nitrogen, High P/K, Ideal Rate ~90 lbs/Tree/Year; Manure for Flowers vs. Vegetables: Composted Only, Match Nitrogen Form; Turning Alpaca Manure into a Profitable Garden Product; Fresh Cow Manure in Rose Garden: Aging and Composting Required; Using Aged Sheep Manure in Citrus Container Mix; Liquid Cow Manure Fertilizer: N-P-K Dilution Calculations for Student Projects; Cow vs. Sheep Manure for Apple Orchards: Nutrient Comparison and Beyond; Comparing Cow and Sheep Manure for Apple Orchards; Using Free Manure as Organic Fertilizer: Aging, Nutrient Values, and Best Practices; The Pros and Cons of Switching to Organic Manure

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