I have a patch of daylilies around my mailbox. I need to divide them
and thin them out because they aren't producing many flowers, though
they have beautiful, rich, green leaves. Is fall the right time of year
to divide daylilies?

I found a collection of iris called Tiger Iris that is gorgeous and I
think it would set off the day lilies well. As the iris fade, the
daylilies, hopefully, will continue to bloom. So I was thinking about
adding a few iris with the daylilies...leaving space for both to
spread. Is there any reason why I shouldn't do this? Do these two
plants not make good companion plants?

Thanks for your help!
Shari