Salvia rubescens subsp. dolichothrox

We have grown this in a pot each year since 2017. In one season, the plant becomes 5 to 6 feet tall. It has been blown over by the wind due to being so top heavy, but it is easy enough to prevent that by weighting down the pot with bricks. It is an excellent late summer salvia for hummingbirds. The only source for this plant was Flowers by The Sea. We are unaware that anyone currently carries the plants or seeds for Salvia rubescens subsp. doichothrox