The rain garden is framed by bamboo on one side and horsetail on the other. A filter fabric beneath the pebbles helps direct water from the roof into the planters and the ground, eliminating runoff.  Photo 6 of 6 in Peaceful Bamboo Gardens by Luke Hopping from A San Francisco Edwardian That Survived the Great Quake Is Revived by a Modernist Architect

Peaceful Bamboo Gardens

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The rain garden is framed by bamboo on one side and horsetail on the other. A filter fabric beneath the pebbles helps direct water from the roof into the planters and the ground, eliminating runoff.