This is probably a very worn out topic, but I was at a local garden center this weekend looking at all of the available Knock Out Rose selections and settled on the Double Pink variety. Here's my question before I buy - Is the Double Pink variety as vigorous as the original single rosy red variety? I have heard that The Rainbow isn't and the Sunny is vigorous but a little lack-luster due to the quickly fading blooms. I really don't want to put the originals in my garden because they are so over planted these days. I will be planting a long hedge row as a back drop for groupings of Euphorbia 'Nothowlee' and the new Black Coral Colocasia, so I need a good four foot high hedge and am hoping Double Pink is vigorous. Thanks for the feedback.
The double Pink is my favorite and seems to be the best looking of them. The yellow one does fade quickly. There is just something about the pink one that looks more like a "real" rose than the others.
My fav is the Blushing Pink ( a pretty pale pink single bloom) I have several planted on the far side of my Black Knight butterfly bushes, and the roses are great, long bloom time, and a good size. Got them on sale at Lowe's end of season sale in fall of 2010.