On 15/01/2013 15:12, Janet wrote:
Any weed requires photosynthesis to sustain rootsystem survival; and
if you keep preventing photosynthesis (by ruthlessly destroying all new
growth) the roots eventually become too weak to sprout again, and die.
I've even killed an ancient dense plantation of japanese knotweed by
that method (it took a couple of years).


So how does grass grow back so well if we constantly cut it back so hard
in our lawns?

--
Janet T.
Amersham