Interesting design - creating personal rooms in a larger public space. - hexagonal design with flowers growing around you which is attracting bees promoting nectar extraction therefore pollination, to offer the environment something back !
Check out this super easy Raised bed garden design! And you can put little flowers in the cinder block holes as a cute, colorful border too! I'm definitely going to be doing this for my vegetable garden this spring! This design is using 10 cinder blocks
Raised beds, collecting rainwater as well. - perhaps tiered beds can have a French drain at the end that catches excess water run off from the rain. It would be a larger area to collect rain water and would only be extra If the other plants were all