Probably easiest to
describe this by comparing it to Salvia patens, it has the same
bright blue flowers all summer and autumn (although the flowers
are a bit smaller) the main difference being in the growth habit,
S. patens is stiff and upright and grows from tubers, whilst
Salvia cacaliifolia has a running root like mint and is more
floppy. Tender, it needs to be brought into shelter for the winter.