If you are referring to the Lenten Rose (Helleborus x hybridus) or Christmas Rose (H. niger), they probably would not perform well as perennials in your Zone. I haven't had long term success with them in Zone 8/9.
There are 3 species that would grow well in Zone 10, but do not have the colorful flowers of the Lenten Rose.
H. argutifolius (some cultivars are: 'Silver Lace', 'Pacific Frost' & 'Janet Starnes')
H. lividus
H. x sternii (hybrid between the above 2 species)
H. lividus is native to the Mediterranean island of Majorca and H.argutifolius is from the islands of Corsica & Sardinia. Average winter temperatures there are in the range of 3-4°C (37-40°F) and summer averages are 28-38°C (82-100°F, depending upon elevation).

I agree with georgia-rose. The species and hybrids listed above, as well as other selected hellebore hybrids (depends on parentage), should do well in zone 10. Was recently (earlier this week) in Newport Beach, CA and saw various hellebores from that short list for sale in a large and very well known garden center there.

I would not recommend x hybridus for that climate, however.