Den, I'd say that Eucrosia bicolor's flowering is linked to warm temps as well as a distinct winter dormancy, not too cold. Mine have flowered every year since accquiring them back in 1997. Funny, the Eustephia jujuyenis you sent flowered just once, the season after you sent it! Phaedranassas flower irregularly here, but do flower. So, climate is the limiting factor with these amaryllids! Happy and safe New Year! Kevin D. Preuss http://www.amaryllis-plus.com/