Fresh Manure in the Garden: Hot vs. Cold, Composting Rules, and Salt Risks

Fresh cattle/horse manure = "hot" — must compost. Sheep/rabbit/llama = "cold" — can use sooner (still best composted). Here's the protocol.

Hot Manure (Horse, Cow)

• High N, pathogens, weed seeds.
• Compost 1+ years. Pile, turn, let heat kill pathogens/seeds.
• Sift after aging; then add to active compost.
• Long-term risk: salt buildup from repeated horse manure use.

Cold Manure (Sheep, Rabbit, Llama)

• Lower N, fewer pathogens.
• Can age 3–6 months or compost.
• Excellent mixed 50/50 with alfalfa hay → shredded → mulch + soil builder.

Best Practice

• Never apply fresh manure to food crops.
• Compost all manure for safety and nutrient stabilization.
• Diversify sources — don't rely on one animal type for years.

Resource

Composting guide: avant-gardening.com