I had Primal Scream for 3 years before I moved. It didn't more than 20 inches or so. The blooms were huge though and very bright.
Sugar Candy is bright color for purple, I love the orange eye and it blooms like mad.
Little Bee is also a bright color and has a small flower but it gets tall for me. I like it because it blooms later than a lot of the others.
Eruption is a nice bright red, I love it, but it doesn't bloom as long or as much as some of my other dl did. The blooms are big too.
