Jose Duran shows off some of the earthworms he cultivates at Pinetree Park Community Garden in Miami Beach, Fla., on Aug. 27, 2015. Earthworm castings are composed of digested soil particles, organic matter, and secretions.
Jose Duran shows off some of the earthworms he cultivates at Pinetree Park Community Garden in Miami Beach, Fla., on Aug. 27, 2015. Earthworm castings are composed of digested soil particles, organic matter, and secretions. DANIEL BOCK FOR THE MIAMI HERALD
Jose Duran shows off some of the earthworms he cultivates at Pinetree Park Community Garden in Miami Beach, Fla., on Aug. 27, 2015. Earthworm castings are composed of digested soil particles, organic matter, and secretions. DANIEL BOCK FOR THE MIAMI HERALD