How do you get the herbivicus spell in Harry Potter and the Goblet of Fire for PlayStation 2?

Answer 1

On one of the later levels known as Herbology you head straight down the steps outside the greenhouse maze and to the left. There you will find a book that automatically teaches you the spell.

Answer 2

If you walk all the way down the Quidditch Gate tower and up the stairs on the the back lawn where the Huffelpuff dueling club is, you can walk across the lawn to the castle. The entrance with the pots on the left and right side is titled Herbology. Goo inside here and out the other door. You will be at the Greenhouses.

Answer 3

To get the triwizard shield, you have to use the cauldron to blast the wall.