Hi I have kept both Hermanns and Spur Thighed tortoises for over 35 years and have lots of experience in good husbandry.All my hatchlings are brought up as English using no vivariums .They can go into the garden from day one and outside full time by year 3/4 and then hibernate year 3/4 onwards. This makes a very hardy tortoise that will live for over 100 years !