Salvia longispicata

Another confused species from Mexico, I am uncertain that I have the correct plant. Descriptions of this salvia state that this can grow more than 6ft. tall. Well, mine is a compact plant no taller than 2 ft. It comes into flower in September, fairly long spikes smothered with light blue flowers. It would seem that it is closely related to S. polystachya, another confused species. What I have written would appear to be rather pointless, but my plant, whatever it is, is a good one! Hopefully I will be able to clarify these comments one day!