Evergreen candytuft has always tended to rebloom in the fall and some cultivars faithfully bloom a second time, although not as heavily as in spring nor over as long a time. But who can complain about four weeks of fall flowers. Snowflake' is one of the most common cultivars, with larger flowers in larger clusters over a long period of time. In my garden it blooms sporadically throughout the summer and fall. They may stay in bloom for 3 months or more if you have a long, cool spring.
Hellebores are totally trouble-free once established.
Most live just about forever, but they're very slow to get started. Usually evergreen, hellebore leaves are toothed along the edges and divided into broad or fingerlike lobes or leaflets. They are surprisingly tolerant of summer drought but absolutely will not tolerate wet feet at any time of the year. The best advice I can give you about hellebore culture is to plant 'em and ignore 'em. Just let them do what comes naturally.