What is the best calcium powder?

[RosemaryDW]

IDK if this is the type of dandelion that is good for tortoises https://www.amazon.co.uk/Shelled-Wa...74&sr=8-1&keywords=dandelion+shelled+warriors.

Yes.

Dandelions grow pretty low to the ground so you'll need a bit of space to grow more than a few at a time. But that may be all you need for a small tortoise.