Dead stems of Brugmansia and other killed-to-the-ground plants were saved over the winter and cut to lenghts to just fill the holes in concrete blocks used as supports for summer pot benches.
The dark brick pieces in front filled the holes after I saw bricks in the holes of concrete blocks on a feature from the Baltimore Sun on the garden of artist Sherrill Cooper. Bricks made blocks look more 'finished' but bug hotels serve a purpose.
One hotel room has plant stems the other has soft found wood pieces. I think putting thin stems in the diamond shaped hole in the center might be a good touch.
Brug stems have pithy centers that shrink away leaving a cavity.
There will never be a time when there are not pieces of something awaiting its best usefulness.
Once that first block was done, I went on a short yard tour. I saw a Scarlet Tanager; heard a woodpecker, first pecking on a hollow limb and then making that pock, pock, pock call.
Seedlings are coming up: Tithonia, Melampodium and Madagascar Periwinkle are appearing. None of these require effort on my part except to pull weeds.