And a piece of cantaloupe from time to time would do wonders for your torts spirit and certainly would not do harm to his body as a treat.....it is not the forbidden fruit...lol
I have read more than once that Hermann's torts are strictly broad-leafed weed eaters and that the sugar content in fruits is too much for their systems to handle comfortably- it causes bacterial overgrowth (which certainly sounds bad!).
All mellon, squash, and cucumber leaves, flowers, and fruit/vegetable are acceptable food items. The fruit grown today versus the historic produce is very high in sugar, so the advice to keep fruit to a minimum is wise. But all these kinds of plants are excellent foder. Large tortoises will come across a vine such as these and just eat it from one end to another consuming a multi-meter length of vine. Now that's looooong fiber. The seeds provide substrate for gut transmission, at least for larger individuals.