Using Manure Safely in Rose Gardens

Manure as Soil Conditioner, Not Fertilizer

Well-rotted cow or horse manure (aged at least one year) is an excellent soil conditioner for roses. It improves soil structure, encourages beneficial microbial activity, and helps roots access nutrients. Fresh manure, however, contains high ammonia levels that can burn tender rose roots.

Phosphate Buildup Concerns

Phosphate accumulation from manure is only a risk with fresh or excessive applications. Aged manure that has decomposed for a year poses minimal risk. A bag of composted steer manure incorporated into the planting hole provides benefits without harm.

Best Practices

• Use only well-composted manure (dark, crumbly, earthy smell)
• Incorporate into soil before planting or as a top dressing in spring
• Avoid piling manure against stems to prevent rot
• Supplement with balanced fertilizer for complete nutrition