Good wine needs no bush

High-quality goods need no advertising because people soon get to know about them.

In olden days, taverns and private houses where beer or wine could be bought by travellers had a branch or bunch of ivy hung up outside, ivy being sacred to Bacchus, the god of wine in Greek mythology. If the liquor offered for sale was of excellent quality, there was no lack of customers, so there no need to hang out the ivy.