On 5/22/2012 6:52 PM, John Rumm wrote:
On 22/05/2012 22:11, The Medway Handyman wrote:

It also occurred to me that they could be - on occasion - topped by
perspex 'lids' in timber frames to act as mini greenhouses (can't think
of the name).

Closh or something like that...

Cloche.