It is one of the Rebbe’s directives to make a shehechiyanu on your birthday. Can it be done on new clothing or only on a new fruit?
Yes, it can. Sources: Sefer Hasichos 5748 vol. 2 pg 407 See also here: https://asktherav.com/4021-shehechiyanu-on-new-talis-sirtuk-or-other-clothing-hatov-vehameitiv-on-wine/ To note, that perhaps there is an advantage in saying the shehecheyanu specifically…