After 20 week scan for my first!
Id recommend doing it in the 2nd trimester, by the 3rd you'll probably be nesting but probably not have the energy for decorating etc from experience with my first. There is no right or wrong time though, enjoy the process 🥰
With our first we were done by 16 weeks I'm very pedantic and a manic planner so if things aren't done I'll just panic constantly, we deliberately done it unisex incase we had another even though we knew he was a boy when we finished it. So this baby we're pretty much sorted and ready unless it's a girl then we need to get some clothes that's it really haha 🤣 x
I think I’ll do this after 12 weeks.