From our city's free mulch web page:

"For example, after leaves are collected at curbside, they are treated and
offered to the public as compost. Holiday trees are sent through a wood
chipper and converted into mulch; a material perfect for flowerbeds or other
landscaping projects (note: mulch is not suitable for vegetable gardens)."

Why is it not suitable for vegetable gardens?

http://www.cityofrochester.gov/artic...?id=8589936436