Sound Off: Is the city compost safe for use on vegetable gardens?
Megan Gilliland, the city’s communications manager, provided this answer: The city’s compost is made from the weekly curbside collection of residential yard trimmings, which includes grass, leaves, garden prunings and small woody waste. Due to the length of the composting process and the biological changes that occur, 99 percent of all chemicals have dissipated prior to public distribution. City staff tests the compost for levels of ammonia and carbon dioxide; tests are also completed for pH and salinity. Compost is a fertilizer and is meant to be mixed into the soil. For food gardens, it is recommended to add up to 1.5 inches of compost to every 6 inches depth of tilled soil. A word of caution: Do not plant in 100 percent compost. The city’s Spring Compost Sale begins Friday and continues though Saturday or until supplies run out.