I would imagine that 'green giant' would grow about the same rate as a norway spruce. Norway spruce are in their own right, incredible growers. I have some 'green giants' like Eric, and I am not impressed. Will they grow fast and look good in the future. I'm sure they will. But 5ft!!!!!!
Probably in a nursery with ample care. Such numbers can only lead to disappointment.
A positive going for 'green giant' is the lovely foliage and its great smell. Crush some of its foliage and sniff the days away. Couldn't think of doing anything better, other then.., fishing, of course.
