Piri Piri and Harvey find a magical garden, but Piri wants to keep the discovery their special secret.
- The title is a reference to the 1911 novel by France Hodgon Burnett, The Secret Garden.
- It is revealed that Piri Piri has a crush on Harvey.
- If you look closely in the garden right before it closes up, there is a hedge shaped like SpongeBob SquarePants.
- This is the first time Piri Piri hugged Harvey.
- This is the fourth episode where Piri Piri is the main focus. The first are "Harvey's Favorite Book", "Harvey Isn't Scary", and "Arbor Day".
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