Hi everyone

I've sneaked over from uk.rec.waterways, someone there suggested I ask this
one here.

I live on a boat, and I have discovered a rats nest nearby.

My plan is to use one of those systemic weedkillers which will kill all the
vegetation near the boat, mainly stinging nettles and such, and neutralises
when it hits the ground, and next spring plant something else which rats
either despise or which will kill them when they eat it. Hopefully something
which will stop the repeated growth of nettles, grass etc. I don't mind what
it is, as long as it has the desired effect!

Any suggestions? There are no pets or anything nearby, I was guessing that
ragwort? might do the trick.