In article , Paul Eggleton
writes

ha ha! just found http://www.rhubarbinfo.com/ from the earlier Rhubarb
thread.

Soz for the interruption - that should keep me busy.

Just in case anyone else wishes to know; take off any flower heading
rhubarb stems (usually circular) as near to their base as possible, and
as soon as they are seen. That will encourage more edible stems to grow.

Outdoor grown rhubarb, whether for fresh eating or for freezing is at
its best during April and May. It can still be picked quite a bit later
than that, but as the year progresses, the stems become more stringy,
tougher and higher in oxalic acid content.
--
Alan & Joan Gould - North Lincs.