Police are appealing for the owner of nearly 14 kilograms of cannabis leaf found on a street in Sydney's inner west to come forward.

Police say the drugs were dumped on the median strip on Holden Street in Ashbury some time yesterday.

A member of the public noticed a large green plastic bag on the street about 5:00pm (AEDT).

The person then found four bags containing what they believed to be cannabis leaf and alerted police.

Police say they retrieved the dumped bags for forensic examination.

Investigators have appealed for the owner of the drugs or anyone who knows who dumped the bags to contact Ashfield Police Station.