The University of Arizona

College of Agriculture and Life Sciences

Improving Lives, Communities and the Economy

Ask the Experts - Compost Teas

Ask the Experts - Compost Teas

University of Arizona Cooperative Extension & College of Agriculture and Life Sciences: The topic is the safety involving compost teas. It's important to be careful and thorough when making and applying compost teas. Researchers from the University of Arizona have been studying compost teas and plan on continuing their research to see if what happened in the lab will also happen out in the field.

The 120/90 day rule is that crops cannot be harvested until after 90 or 120 days if compost or compost teas are applied in the field.