Is composted cow manure safe?
John Castro
Updated on April 16, 2026
Composted cow manure is safe to use because the heat generated in a compost pile kills the pathogens that may cause illness. Temperatures above 140 degrees Fahrenheit kills pathogenic microorganisms as well as weed seeds. Heat is created in a compost pile by nitrogen sources acting on carbon substances.
Is composted cow manure safe for vegetable gardens?
Composting Cow ManureComposted cow manure fertilizer makes an excellent growing medium for garden plants. When turned into compost and fed to plants and vegetables, cow manure becomes a nutrient-rich fertilizer. It can be mixed into the soil or used as top dressing.