In article ,
Martin wrote:

First thing is that couch grass isn't that deep rooted - usually about
4", rarely more than 6" deep. If the ground is well dug - i.e. the
soil is relatively loose - then it's often possible to pull it up
gently.

In the sandy soil where we live couch grass goes down up to 12" deep
It can't be pulled up by hand.

Well, my soil is sandy, and I side with Jake. It spreads with
relatively shallow roots (often just 2" down), and only goes down
when it establishes itself. Also, like ground elder but very unlike
bindweed, it tends not to regrow well from its deep roots. I often
get one regrowth from deep roots, but rarely two if I remove it at
the right time.

My wife renovates abandoned allotment plots, that are full of deep
rooted couch grass. She asked me to make the post.

Ah - hearsay :-) More seriously, that's precisely what I said.
The OP was asking about (presumably) recently invasive couch
grass, which is very rarely deep rooted.


Regards,
Nick Maclaren.