I grow Viola cornuta in white and a mauvy colour. I've never picked up the scent, I'll investigate next season. They're the only violas I grow.
Yes, the pink one.
It's easy to germinate, seeds about, mine has been self seeding for years though I only had 2 this year. Attractive in its early stages, huge and boring later.
Is that the one with the pink new growth?
If it's just the one and you're doubtful then compost it.
But as far as I know nothing tastes and smells like a carrot except a carrot
carrots fork if they have too rich a diet. I should think that's what's happened there
The leaves look like carrot.
Did you use a lot of muck?
Garden Carpet I think Lyn
The bed can go right to the wall but I wouldn't plant close to the wall, especially with shrubs. a couple of foot away at least
Choisya gets quite big for a position in front of a window