The Worst Witch S02 E12 Green Fingers and Thumbs

"Mildred Hubble spells trouble."

Mildred's potion exam, & gardening competition are both happening at the same time! Her chances of passing look slim, as Ethel and Drusilla conspire to get her thrown out of Cackle's. When Mr. Blossom's greenhouse is trashed, Miss Hardbroom suspects Mildred, & forbids her from participating further.