David in Normandy wrote:
We have several varieties of ornamental grasses in the garden. Should
they be cut back? If so at what time of the year.

Any time, if you can find a suitable source of alloxydim.
(from you will gather that I can't stand so-called "ornamental" grasses.
Cortaderia and some Miscanthus are honorable exceptions).

--
Jeff
(cut "thetape" to reply)