[whichquestion]

The bee hotels we have typically attract non-native mason bees which are later parasitized by parasitoid wasps. It may be better to encourage plants that have pithy stems and leave them over winter (if you are in area with winter) so that bees can use them to nest.

Planting wildflowers with genetics native to your region is among the best things you can do to support pollinators.

[quercusa]

We had one of those bee hotels up. It turned out to be a buffet for the parasitoid wasps. There seems to a reason that mason bees, etc. are called 'solitary'.

We've currently got Mountain Mint (Pycnanthemum muticum) and Joe Pye weed (Eutrochium dubium 'Little Joe') blooming. They are covered in honeybees and all kinds of others I've never seen before.