I'm looking for suggestions to plant in a roadway center island that
has no built-in irrigation. They'd have to be drought-tolerant plants,
probably native to my Northern California (Zone 9) locale. Initially,
watering would only occasionally be provided by a nearby neighbor until
the plants get established enough to (hopefully) survive on their own,
with whatever Mother Nature offers them. Low-maintenance would also be
a requirement.

Suggestions appreciated.

-Fleemo