From Country Life Magazine (May 31, 2020):
The wisteria at Petworth’s private garden is simply astonishing. Non Morris takes a look at how it’s done, with pictures by Val Corbett.
The beautiful pergolas in the Cloister Garden are trained with Wisteria floribunda Alba, a white Japanese wisteria selected for the tantalising length of its racemes — up to 24in — and the way the flowers open gradually along the stem, which prolongs its flowering period. The wisteria is pruned once only, in September.