Like big tropical looking foliage?
Not all that commonly seen in gardens here in the San Francisco Bay Area, although there are some big examples of this at both the UC Berkeley Botanic Garden and SF Botanic Garden. A roadside weed in southern Mexico, growing both in hot dry desert areas on the highway verge, as well as lush trees in the cloud forest of Oaxaca. Gorgeous huge clusters of blue flowers in bloom. Anyone else growing this? It is also an escaped weed in the north and east facing canyons filled with chaparral in Los Angeles County, maybe you've spotted this in bloom while driving on the freeway?
Here is a link that might be useful: Wigandia caracasana