Pampas Gone - Roots?
First of all sorry if this is something answered elsewhere, I'm new and new to gardening!
I had a huge out of control pampas grass in the garden that the good lady wanted removed so we could make use of the space.
I cut it back and then basically axed it up right to the soil - there's literally nothing left of the plant!
That's great, and I can only see small (0.3ish cm) roots around the 1m area it took up.
So, my question is - what now please?
I don't want to use this area for anything else plant wise (paving for a kid's swing instead) so considered weed killer covering the 1m patch.
Would that be enough to kill the root system before covering with visqueen?
Or, will it all need digging out?