I saw The tortoise table website and is cool, I didn't know that sulcatas can eat african viola without any risk. I have a lot of them in my backyard. Thanks for sharing!
Yes, yes and yes. Geraniums are fine for tortoises to eat as part of a varied diet. Careful though, they will eat it to the ground given the opportunity.
Geranium flowers are edible. My Greek tortoises do not like the leaves tho, just the flowers. Sulcatas I can see mowing them down, the little eating machines!
I use edible flowers in salads. I shared this edible flower people food list on this thread below. You may also want to research further and cross reference with thetortoisetable.org.uk just to be sure of things :
Those look like geraniums to me too, but I'm no expert. Someone who KNOWS for sure should verify. I have read they are edible, but none of my tortoise will touch the flowers or leaves. The leaves have a strong, but not unpleasant oder to them.