Where to Find and Catch Torterra
From Pokemon Go Wiki
Torterra are found and captured in Nest and Habitat locations.
Nests
Torterra Nests are locations that consistently spawn Torterra.
Habitats
Torterra Habitats are spawn locations where Torterra is likely to be encountered, but not guaranteed the way a Nest is.
Additional Tips and Information
Best Nests
If you know a really good nest or any of the nests above is really good, list them here: