In article , andy stone
writes
Having scraped off a lot of top soil from plant pots to get rid of the liver
wort, i would like to use this soil again in the bottom of some big pots.

Providing I cover this soil with a couple of centimeters of compost will it
all die off, since it will be deprived of light ?


You'll be lucky. The bits you bury'll die but these weed liverworts
shed millions of tiny propagules so they'll be back as soon as you get a
spell of cool wet weather.
--
Sue ]