'So Lovely' suffers severely from 'spring sickness' (ss) here. This year I divided it to see how many fans were in my clump and counted more than 30 fans. They barely produced four scapes due to spring sickness. I'll be checking carefully how well it survives next spring's bout of ss.
There are two other cultivars that rival it for how severely they suffer from spring sickness here. Both of them also have large clumps and barely produce a few scapes with a few buds each year. They are 'Sabra Salina' and 'China Bowl'.