Up close, it's a series of 4 x 6 inch boxes, stacked together in six-by-six grids, then stacked again. Each box contains one plant - ivy, pachysandra, heuchera, or some kind of decorative grass I can't identify.
Above each six-by-six grid is a pierced tube that I assume functions as an irrigation system.
The individual boxes must have holes too, so that the water can drip down from box to box. Also, the soil must be packed in pretty tight to prevent the plants from falling out!
Anyway, whoever does the landscaping at
The variegated grass-like plant might be liriope. Hard to tell in the photo.
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