Herbert Peabody is a farmer who grows fruit and vegetables in his big, big vegetable patch at Mulberry Tree Farm.

When his niece Clementine and nephew Digby come to stay for the school holidays, Herbie can't understand why they know so little about vegetables.

But there's a bigger problem: Theo Knead-a-lot's famous bakery is under threat and he needs Herbie's help.

Can Herbie teach Clementine and Digby about the importance of vegetables?

And with some hard work and a little bit of magic, can they make something extraordinary happen?