Picea pungens 'Royal Knight' vs 'Blue Diamond'
Went to the local nursery and found Picea pungens 'Blue Diamond' and Picea pungens 'Royal Knight'. From what I've read 'Royal Knight' shapes itself unlike 'Hoopsi' and is more grey blue. I've read that it grows fast for a spruce but there are some posts that contradict that. 'Blue Diamond' comes from Europe and descriptions indicate it's not as large. Can anyone share their experience with Royal Knight or Blue Diamond particularly comparisons to Hoopsi?