I bought a rather small (7 1/2 inch across) bicalcarata "red" x northiana last November, and although it's only now starting to show pitcher buds, it has already doubled in size. From what I hear, this cross grows super-huge.
Please post pics of your specimens and share your experience - I need to know if I have to add a new wing to my greenhouse in summer.....
Unfortunately I don't have one of these but its one of the hybrids I've always wanted. It's in my mind the ideal combination of coloration and pitcher shape. Given the size of the parents you probably will need that extra square footage in your GH...