A vitamin supplement designed for tortoises is recommended. Here is a partial list of foods suitable for your sulcata. You will need to experiment to discover what yours likes best. Ideally, consult your vet to disucuss the most appropriate diet for your pet. A good source of fiber, and a practical alternative to grass for indoor kept sulacatas.
Dark greens are generally best, keep spinach to a minimum.
Lettuce offers very little nutritional value. Strawberrys The color works as an attractant, and sulcatas generally like stawberries, but keep all fruits as occasional treats and not a staple part of the diet. Too much will cause thyroid problems. Tomato Leaves only The leaves of the tomato plant are poisonous - don't grow them in your yard if your tortoise spends time outside. Keep your tortoise away from fatty nuts and seeds as much as possible.