I discovered Coral Beans in Florida about 20 years ago. I brought some seeds home, planted them & now have several varieties. I have not been able to get them to bloom, so I suspect they really need repotted. I put them outside in the Spring until Fall, then greenhouse them all winter. So if you like Fatplants, E. herbacea is great. I also have one that is a tall tree covered with spines. It bloomed some years ago. As do they all, needs repotted with heavy gloves on.
I think they need some cold to bloom. The one I have that is protected under an oak never blooms, but the other that stays exposed is. They grow along the sides of the road in my home state of SC, so I know they'll survive a freeze. Try leaving them outside longer, and putting them back out when temps are right at freezing at night.
Well, the Greenhouse gets down to 50 degrees at night. I'll repot them when the weather warms up, fertilize & see what happens. They have been greenhoused all winter. We have freezing temps both day & night here in PA. I do put them outside from mid May to Mid September.