Definitely a shade-loving Salvia. In direct sun, flowers fall off after mid-day. Just like S. amarissima.

Robin

Im aware of that now always thought it liked more sun. Theres not much shade around here unless I put them on the north side which is mostly shade but not good for viewing at all. I also noticed the same effect on lady in red at my sisters filtered light location .

This was my first year growing subrotunda. The blooms did not last long in summer because they got a lot of hot, midday sun. Late summer into fall, however, with more shade, weaker sun, and cooler temps, the blooming was excellent throughout the day. I grew the two plants in the only open spot I had, so that's where they'll have to be again next year.

Im thinking the blooms only last a day so regardless. If I grow this plant next year it will be in shade or on the back side of home. Maybe the same for any s. coccinea plants.