A&C Walters wrote: "So apart from the halocho of sofek orla bEY lechumra, in metzius a lot of it is, l"a probably vadai orla?" IIUC, orla is not just assur; it is relatively rare for many species because trees that young are not mature enough produce fruit. One would have to investigate which species of fruit have a chashash of orla. Does anyone have such a list? - Ilana