Absolutely beautiful.. Cleopatra is one of my favorites. I loved them as much as much as my bengals. I just have more luck keeping bengals alive. It is difficult keeping any cannas growing well here in West Texas. This drought is bad on all of them. I have a small patch of bengals growing well right now... about 4 stalks growing and 2 that have jumped the flowerbed and are coming up in the grass. I need to dig them up but hate to disturb them... they of course look the best of all! LOL
Yes, we do feed them. Where we live is on the edge of Hill Country, which is just a lot of limestone...VERY Alkaline. So anything with gives them a bit of Acid is good. We make our own compost in one of those big tumblers and then add peat moss to it. The peat moss will add a bit of acidity PLUS it holds in moisture...also much needed here. Every now and then we will buy a bag of organic food for Azaleas...which is acidic...and I throw it around all the Cannas. We mulch with pine bark which also adds acid.
So what you feed your Cannas will depend on your soil.
We love the Cannas because they bloom until a frost, and they can take our heat and sun. Not to mention, I love how tropical they look.