Tarragon is very temperature sensitive and cold temperatures slow growth and quite commonly causes leaf quality issues.

BBC: Who, What, Why: Where has all the tarragon gone?

The fancy-leaf begonias have a quieter appeal than their waxy sistren, with a chic Victorian quality that makes you forgive them for being more finicky as a houseplant.

WSJ: Rethink: Overcome Your Begonia Bias | Off Duty Spring 50