wˈʊd, bɹˈɪk, tˈɛɹɐkˌɑːɾə, mˈɛɾəl, fˈaɪbɚ ɡlˈæs, vˈaɪnəl, ænd sˈɛljʊlɚ pˌiːvˌiːsˈiː mˈeɪ ˈɔːl biː jˈuːzd ɪn wˈɪndoʊ bˈɑːks kənstɹˈʌkʃən.
Wood, brick, terracotta, metal, fibre glass, vinyl, and cellular PVC may all be used in window box construction.