I'm not sure if you've heard of them already, but there is a company on the web called 'Herbiseed'
and they sell a seed mix for tortoises by the gram to plant in your enclosures or in trays. It has a full list of what seeds are in the mix and it looks to include a good variety of weeds as mentioned in
the list already on this site. Very useful and saves hunting through every one else's gardens to get the variety of food for your torts.

Thats great Ketty thanks
We have some other suppliers in our 'bargains and places to buy' board too.
take care
craig