On 22/02/2017 17:30, Another John wrote:
But I would like to treat it this Spring to
encourage the grass, and discourage (preferably kill, eradicate, destroy
utterly) the buttercups.

Just buttercups?

I quite like the primroses and cowslips in ours (yes, both) and I
_really_ like the orchids.

It would be hopeless for a bowling green!

Andy