Expansions

Expansions give more space for everything on your farm and each comes with requirements to meet, such as the Building Permit fee, before they can be unlocked. The difficulty level increases for every expansion, particularly in the cost of coins. Higher level expansions have additional requirements.

Garden
The game tells us that this is a special area for displaying decorations, not farming, but the requirements for expanding it are similar to the main farm.

To unlock the Garden, players must complete the "Garden Show" Happy Acres Story from the Memory Tree for a key and have 50 Helping Hands points, which are obtained by helping neighbors.