This really is one of the biggest “secrets” to
lower maintenance gardening! While keeping on top of
deadheading is in itself maintenance, it's far easier and far more
pleasurable than crawling around on the ground rooting out
seedlings. The key is to keep on top of it - even
one Brunnera faded flower spray allowed to drop seed, will be enough
to cause lots of unwanted seedlings you'll need to dig
out.