ZnO/Al-Zn-LDH nanostructures have been synthetized by chemical bath deposition at 75 degrees C for 15 s to 10 min by immersing substrates (200 mu m thick Al foil (Nilaco), 50-250 nm Al coating on flexible polyimide substrate) in a stirred solution ZnO nanopowder mixed in ammonium hydroxide and nitric acid. The competitive growth of ZnO nanorods and Al-Zn-LDH platelets was characterized by SEM, XRD and EDS and a mechanism for the growth was proposed. Stirring condition was outlined as a key parameter as low value leads to the growth of Al-Zn-LDH platelets while high value leads to the growth of ZnO nanorods.