In article , Tiger303
writes

wanted to check whats the best method before i start pruning at end of
month

hydrangea, cut out all dead stems & then down to 1st or 2nd healthy
bud? thing that confuses e is hydrangea's usually have two buds either
side of each other on a stem, do these count as one or two?

One.

sedum, just cut last years flower stems close to ground as possible?
when is best time as i can see new growth just starting

Any time. Whenever you're fed up of the look of the stems. They're dead
now, so the plant doesn't worry what you do with them.

--
Kay
"Do not insult the crocodile until you have crossed the river"