Well well well, who knows what type of gremlins got into my post this morning. I'm going to copy and paste it over and fingers' crossed it works....
Mystery 1 - solved.
Yesterday I posted a photo of a flowering bush I've had in the garden for years - but I've not had flowers on it for a couple years...after some kind commenters identified the plant for me - a quick internet search revealed.....
( and it is here that I wonder where it all went wrong when I pasted in the internet quote.)
" Do you cut back weigela?
It is best to prune weigela shrubs in the late spring after they have finished blooming. Trimming weigela bushes right after they bloom will keep you from inadvertently pruning off next year's flowers. This is because weigela bloom on wood that it is a year old. The wood that grows this year will bloom next year."