Agastache nepetoides / Yellow Giant Hyssop
Seed from Conservation Halton, collected in Dundas. Yellow Giant Hyssop is not the showiest plant but it is the absolute favourite of bees in my garden.
These are wintersown seedlings in a 3.5″ pot. They are fast, strong growers. Not fussy on soil. Info here: http://ontariowildflowers.com/main/species.php?id=504
Photo credit: Stephen M. Young.