In second term all the witches at Cackles have to pass a potion exam. Mildred is trying to study for hers in the greenhouse with Mr. Blossom (even Blossom knows her potions better than her), while he feeds his plants tea leaves. Meanwhile, a farmer ... (more)from the town comes to the academy. Miss Cackle premtively apologises for scaring the cows, but it turns out that he only wants to host the vedgetable show at Cackle's. For the good of the academy, they agree, and the man sneaks out to the greenhouse, and has an altercation with Mr. Blossom about who's going to win the marrow growing contest. Later on, Mildred and her friends are practicing for their test, but the only way she can remember the ingrediants is to sing them, but Miss Hardbroom tells them to shut up and informs them that they can't practice any extra curricular magic. Ethel gets a wonderful idea and sneaks out to the greenhouse with Drusilla. She pours a sticky potion on the ground and they watch as the farmer comes back and dra