I used to think regia was sensitive to high temperatures, now i'm not so sure. Mine spent last summer getting baked in a south facing conservatory where it gets full sun all day, it's coming back into full growth now we're getting some sunny days (even if it is freezing outside). Conventional wisdom also suggests regia likes a drier soil than other Drosera - I disagree, mine is very thirsty and stands in water permanently through the summer. For sure i agree that a large, tall pot is a necessity the roots are really long, in a fairly open potting mix with plenty of perlite.