This form is listed by a number of internet sites but with inconsistent description and photographs. It is variously described as "pure white" and elsewhere as "pale pink". We have not yet seen a specimen in flower to be able to form an opinion. We are seeking authoritative information.

Approximate height: 2.0 - 2.5 metres
Flowering period(s): (Mar) Apr May
Pruning: Hard prune (Group 3)
Other name(s): alpina 'Diamond Anniversary