I agree with B-L and now I needn't type all that
If there's nothing there it won't matter
most people leave the cutting back of penstemons til spring. I've already shortened mine to stop them thrashing about in the winter gales
Yes, they need all the light they can get.
by this weekend it will be October. They aren't evergreen.
if you add organic matter, muck, compost, the worms will turn up on their own.You'll get a better lawn as well
There are a lot of them
that could be Viburnum lantana, Wayfaring tree
start from the camera icon and make your photo much smaller. I reduce the size of mine to 30%
slug worms probably, there are quite a few species, I had Cherry Slug Worm, Caliroa cerasi, never seen any of the others.
it would take a top class spurgeologist to ID the species/cultivar
the flower, as you suspect, isn't from the same plant Emmalily