I used the bear classifier code nearly one-to-one to create a wild garlic vs lily-of-the-valley classifier (getting Binder to run the app was not easy but the forums were helpful).
Both plants are very common in Germany.
Wild garlic (German: Bärlauch) is a plant whose leaves are used for making tasty soups and pestos and Lily-of-the-valley (German: Maiglöckchen) is a very very similar looking plant that is highly poisonous!
Enthusiastic visitors to Germany who want to try wild garlic recipes need to be very careful while picking these leaves! This app can help 
Jokes apart, I got 86% accuracy when I used the defaults (150 images of each class, standard transforms, just like the bear classifier). Over the next couple of days, I might look more into improving the model.