OK, maybe a slightly odd question, but here goes:
Our new neighbours sit at the front of their house smoking at all hours of
the day and night. Due to the lay of the land, the smell fills our front
yard, and if we have our front door open, it fills the house as well.

We have a strip of garden between our driveway and our joint fence which is
in dire need of attention - so now I'm wondering if there's anything I can
plant that would help to filter the air between our place and theirs. Or be
sufficiently (pleasantly) fragranced itself year-round that it might
overpower the smoke pong. Any ideas anyone? The strip of garden is only
about 2ft wide, and I don't want anything that's going to end up scratching
the car every time we drive in and out (had that problem for many years, and
a badly damaged car as a result!).

Thanks in advance,
Penny
(in Beecroft, Sydney)