In 1969, a gardener in Kent bred a cultivar of dwarf bearded iris with reddish-purple flowers. He gave a specimen to Sissinghurst, where it was planted in the Purple Border, and named "Iris" 'Sissinghurst'. During the 1970s, a pink-flowered specimen of "Glandularia" ("Verbena") was given to the garden and named 'Sissinghurst'. In 1976, the garden was given a distinctive specimen of "Pulmonaria officinalis" that, unlike the species, has large white flowers (along with the white-spotted leaves of the species). It was planted in the White Garden and named 'Sissinghurst White'. Around 1977, the gardeners purchased a collection of seedlings of "Thalictrum aquilegiifolium". They selected the best plant, having larger flowers, and propagated it. This plant was added to the White Garden and named 'White Cloud'. From a planting of "Penstemon" 'Evelyn', which is a selection of "Penstemon barbatus", a specimen was named 'Sissinghurst Pink', although Lord does not consider it to be distinct from 'Evelyn'.