After filling a gap behind the Tsukubai water feature with a fern, I decided to do something similar with the large rock in front of the mini Zen garden along side the back porch.
The stone was placed in this location back in the summer of 2023 However, at the time I was concerned about the lack of plantings and the seemingly sterile look of all the hardscape stones and brick. Having used a Ghost Painted Feen (Athyrium x 'Ghost') behind the Tuskubai I decided to try the same fern behind the large rock.
These ferns can grow up to a maximum of 3' so I will need to keep an eye on it over time.
For now it looks great and does a good job of adding a plant element to the mini Zen garden.