from circular street at Vinogradska hospital take Podolje street. First street on the right is Vrtlarska, all the way straight.

Alternative route,
From Ilica, than Mandalčina, behind Vrhovec street first on the right is Vrtlarska, along three stories buildings on the left follow the street till the end where number 2 is.

Street is circular and you can enter it from both Vrhovec and Podolje streets