Lucy flower quest

[Tíu]

Is it possible to give the flowers to Lucy at the end of the game?

[Talamarie]

After Laddak ? No.

[quintonhoffert]

Good news is that it doesn't unlock anything except the achievement. If you're going for 100% then you'll unfortunately have to do it again, but you didn't miss any cool items or weapons or whatever. She just thanks you and the achievement pops.