Instructions
Increase your gardener experience by collecting Pinatas as residents in your garden, breeding pinatas by meeting their breeding requirements, and master romancing pinatas by breeding them at least five times. As you increase your experience, you will notice your experience meter (located in the upper right corner of the screen) filling up.
Raise your gardener level by one by completely filling up your experience meter.
Repeat steps 1 and 2 to raise your gardener level to 11. At this point, your garden size will increase.
Repeat steps 1 and 2 to raise your gardener level to 21. At this point, your garden will increase to its maximum possible size.