Joseph,
Remember that Salvia rubescens ssp. dolichothrix likes a lot of water.
According to Kermit of FBTS, this is what he wrote on Salvia rubescens ssp. dolichothrix.
https://www.fbts.com/salvia-ru...
"Although water-loving, it grows well with average supplemental watering based on local conditions."
Kermit also lists the height as 72 to 84 inches and 48 inches wide.
I grew it a few years and had it it a 16 or 18 inch container on my patio and thought I was giving it a lot of water, but apparently, I wasn't since it died on me. Perhaps it needed a much larger container also.
Good luck
