A little while ago a friend told me he was having trouble establishing
LotV in his garden (like me he's a beginner) and it was only after
reading up recently that I've discovered how invasive this plant can
be.

Now I'm beginning to harbour similar qualms about JA which seems to be
spreading out on all sides with gleeful haste.

Do these propogate themselves in a similar fashion - as I understand
it through a network of rhizomes?

Is there a tried and tested way of keeping these under control?

Thanks for any advice