I read somewhere that being exposed to cooler temps,, the devils back bone would turn a bright red with veins in it,,,, I also read that the more sun it gets the redder it becomes,, Well it looks to be the cooler temps is the right theory,, I left this out all spring
and summer and now fall,, Temps have been as low as the low 40's at night, off and on for the past couple of weeks,, I have never left it outside when it dropped below 50 this is the first fall exposure to well below 50.
Look at the comparison,, from warmer temps
Here...... inside ~ late winter Last years
now after being exposed to cooler temps...I had to bring it in because this is a succulent
I like it seeing this plant Both ways,,,