Duck Manure in Organic Gardening: Safety and Composting

Commercial duck manure in the U.S. is hormone-free by law (FSIS prohibits hormones in poultry). Any medications require withdrawal periods before slaughter. Properly composted, it's a "hot" manure—high nitrogen, excellent for gardens after aging.

But the follow-up question came from Indonesia, where regulations are lax. Composting does not reliably break down hormone or chemical residues. If source practices are unknown, don't use it on food crops. Visit the farm, ask about feed and medications. When in doubt, choose certified organic manures or plant-based alternatives (alfalfa, compost, green manures).

Composting transforms nutrients, not necessarily contaminants. Know your source.