If I were asked to name this plant I would be inclined to call it a B. nodosa sport and I would be wrong because the name is Bl. Wonder Star. The parents are Bl. Morning Glory x B. nodosa. The flowers are much larger than B. nodosa and slightly larger than Bl. Morning Glory. Although it only blooms once per year it is a very easy plant to grow and is also a reliable bloomer. It was registered by H. & R. in 2001 but I have never seen it for sale by any grower.
Very nice! Has yours been open for a while? Mine has the same red color as the Morning Glory, but fades to white much faster. Do you see the same color change or is it white the whole time? Just curious. Thanks!