That's the idea - hence PlantLab, not CannaLab. Cannabis makes sense as the entry point because it's a cash crop with a big hobbyist scene, so there's enough interest to get real usage data early. But the goal is broader - tomatoes, grapes, whatever grows.
One crop at a time though. A so-so classifier across 50 species is way less useful than a really good one for the thing you're actually growing.