Thank you so muchGreetings. Welcome I see you are a first time poster. A great place to always check is TheTortoiseTable....
here is what it says....
Like other members of the Brassicaceae family, Cauliflower contains goitrogens that can interfere with thyroid activity and could damage the liver and kidneys. Therefore, although Cauliflower is not actually toxic, we would advise you not to feed it to your tortoise (and this advice applies to leaves of the plant as well as the actual head of Cauliflower).
- Common Name: Cauliflower
- Latin Name: Brassica oleracea (Botrytis Group)
- Family Name: Brassicaceae/Cruciferae
The link - https://www.thetortoisetable.org.uk/plant-database/viewplants/?plant=623&c=8#.X5W8WC1q2hA
Thanks RosemaryWelcome!
The Tortoise Table is found extremely conservative by some; not all users rely on it. I’m one of those people.
Russians eat a fair amount of brassicas in the wild; I feed different types to my Russian regularly. That said, there is never any reason to food you’re uncomfortable with, especially as a new owner.