The following are plants that are safe for tortoises to eat - the list is by no means complete as research is still to be carried out in this field. The list has been divided into three parts for the different species of tortoises.
Mediterranean Tortoises
ALFALFA-Including shoots
APPLE-Flesh
BIND WEED-Whole plant
BRAMBLE-Leaves & fruit
BUCKWHEAT-Whole plant
BUTTERCUPS-Leaves & flowers*
CARROTS-Including leaves
CATS EARS-Whole plant
CAULIFLOWER-Including leaves
CHICKWEED-Whole plant
COSS LETTUCE-Leaves
CRESS-Whole plant
CUCUMBER-Fruit
DAISY-Mainly flowers
DANDELION-Leaves & flowers
DOCK-Leaves
ENDIVE-Leaves
GREEN CABBAGE-Leaves HAWKBEARDS-Whole plant
HAWKBITS-Whole plant
HAWKWEEDS-Whole plant
HONEYSUCKLE-Whole plant
MALLOW-Whole plant
MUSTARD-Whole plant
NETTLES-Whole plant
PLANTAIN-Leaves
PURPLE SPROUTING-Leaves
RED CLOVER-Leaves & flowers
RED DEAD NETTLES-Whole plant
RYE GRASS-Whole plant
SOW THISTLE-Whole plant
SPRING GREEN-Leaves
SPROUTS-Including tops
STRAWBERRIES-Leaves & fruit
TREFOIL-Leaves & flowers
VETCH-Whole plant
WHITE CLOVER-Leaves & flowers
WHITE DEAD NETTLES-Whole plant
WILD CLEMATIS-Leaves & flowers
Do not feed any dairy products or meat. Feed calcium on a daily basis - (non lactate calcium) and a vitamin supplement on a weekly basis.

Awesome, thanks for the list of foods.

-Jon DeLong

Great thread Tortoise Lady

Thanks TL ive now made it a sticky so the hopefully it will get more coverage for tort owners.

thank you for the info you have help me out

Thanks alot for this info tortoise lady, i have a suggestion:
My baby tunisian spur thighed tortoise doesnt eat cucumber and carrots, nor bell peppers, he just eats lettuce (NOT ICEBERG) lettuce addict , is it because he is a baby? carrots are a bit tuff for him even so i shred them small and cucumber he seems not to like its taste tho he does eat a bunch when i give him to his face