Not a Hosta

Two years ago, my neighbor split her hostas and gave some to me.  I planted them on the shady side of the house next to the driveway.  One of them turned out to be a canna plant, not a hosta.  I thought cannas needed sun, but these are thriving in the shade.  They need to be thinned out this fall.

My garden doesn't look great this time of year.  It is too hot to do a lot of weeding. Some of my  flowers were planted years ago,  and since then, trees have grown up and are shading plants that need full sun. The day lilies aren't blooming very well.  I think they need to be split.  I have a lot of transplanting to do this fall.