However, if you’re using it with another person – and you’re sharing the vegtoy, then you should, as with any insertable toy you use in anal play, use a condom. Once you’ve washed it you’re good to go, after you check that there are no hard edges or pieces that likely to come off.
You don’t want to be putting whatever is on the skin of your vegtoy – like insecticides, bacteria from other people’s hands who have touched it first and well, general dirt from the ground that might be left on the veg. Make sure you wash that thing (let’s call it a vegtoy) good and proper.
If you are using a piece of veg and you’re by yourself, it is most likely to be safe without using a condom, with a few provisos. Some veggies can make for great and super cheap sex toys…