I am looking for late season blooming Russian Sage varieties.
While I can find a number of varieties online there seems to be
little information on when they bloom. The later the better.
Any suggestions or direction on who might be able to answer some questions?

Varieties: Which are the latest fall blooming?
Blue spire -sterile
Filigran
Blue haze
blue mist
Longin
superba
little spire
Taiga
Lacy blue

@gharrison6

Welcome!

Russian Sage (also known as Perovskia). Even though it has Sage in its name, it isn't a Sage/Salvia.

Filigran, 'Longin' and 'Little Spire' I think are the latest blooming. Not sure about the others.

Here's our Perovskia database listings:

http://garden.org/plants/brows...

An article that has some info: http://garden.org/articles/art...

Perovskia is a Perennial and you might want to ask your questions in the Perennials forum, so you can get the info you want better answered.

http://garden.org/forums/view/...

Hope this helps.