@Silver surfer I didn't prune it a month ago. That was the bay tree that needed pruning yet again that I was moaning about! Ok. Secateurs not shears😊. Something to pass the time tomorrow.
We've one we put in at least four years back, I used to take out the flower stems, but I like the golden touch through winter now, so leave be. I'd read it wouldn't last long, so bought another, but the beast just keeps going.
I just pull off a non flowering stem if you can find one, poke it in a pot of compost and leave it somewhere shady. Flowering stems work sometimes too. They're very easy to propagate - that's why I have too many😕
Ours flowered all winter. It's the most consistently visited plant in our small front plot. So I'd say great for insects. And no bother from slugs etc. It's a great plant, 10/10!
I have a spirea snowmound, that looks great right now, totally full of flower, but I've failed to notice any visitors.
(Alternatives and quite nice partners are the shrubby germander, and rosemary. Both get visits on their simple flowers. They sit quite well together. The germander has a nice silver foliage, and would look nice proudly by itself as a mound, larger than the wallflower. It also appears to propagate well too, so would make a nice long wide low hedge. Ours do fine as we are on the south coast.)
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I don't think the one I have in just now has stopped flowering since I planted it over a year ago.
Take one dead flower stem...follow it down ....and cut.
It is not a job that you can rush.
Not sure why you pruned it a month ago?
Next time no pruning.
Just leisurely dead heading.
I think you will be pleasantly surprised at the results.
Ok. Secateurs not shears😊. Something to pass the time tomorrow.