Quick Answer
Humanure compost can be used on perennial plants, but it's essential to properly age and pasteurize the compost to eliminate pathogens and weed seeds.
Preparing the Compost
To ensure safe and effective use of humanure compost on perennial plants, the composting process must be done correctly. This involves a minimum of 6-12 months of composting, with regular turning and monitoring of temperature, moisture, and carbon-to-nitrogen ratios. Aim for a temperature of at least 131°F (55°C) for 3 consecutive days to kill off pathogens and weed seeds.
Aging and Testing the Compost
After the composting process is complete, the humanure compost should be aged for an additional 2-3 months to allow any remaining pathogens to break down. Testing the compost for pH, nutrient content, and pathogen presence is essential before applying it to perennial plants. A pH between 6.0 and 7.0 is ideal for most plants, and the compost should be free of pathogens and weed seeds.
Application and Monitoring
When applying humanure compost to perennial plants, mix it into the soil at a rate of 10-20% of the total soil volume. Monitor the plants for any signs of nutrient deficiencies or toxicity, and adjust the application rate as needed. Keep in mind that humanure compost is high in nutrients, so over-fertilization can occur if not used correctly.
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