About
Saussurea is a genus of perennial herbaceous plants in the Asteraceae, notable for its flower heads often enveloped in dense, woolly hairs. Species occur across cool temperate and arctic parts of East Asia, Europe and North America, with many adapted to alpine conditions. Leaves form a basal rosette and then spiral up the flowering stem, while size ranges from tiny alpine rosettes to tall thistle-like plants. Flowering occurs July to September, with individual florets and the surrounding wool varying from white to purple.
Wikipedia contributors, CC BY-SA 4.0 — Saussurea
About the genus
Saussurea is a genus of about 300 species of flowering plants in the tribe Cardueae within the family Asteraceae, native to cool temperate and arctic regions of East Asia, Europe, and North America, with the highest diversity in alpine habitats in the Himalayas and East Asia. Common names include saw-wort and snow lotus, the latter used for a number of high altitude species in East Asia.
In the garden
Saussurea comprises around 300 perennial species in the Asteraceae, native to cool temperate and arctic regions of East Asia, Europe and North America, with greatest diversity among alpine mountains. Habit varies sharply through the genus, from dwarf 5–10 cm alpine rosettes to thistle-like stems approaching 3 m; leaves arise in a basal rosette before spiralling up the flowering stem. The flower heads form dense capitula and are commonly fringed or concealed by woolly hairs, which in high-altitude species protect flowers from night frost and intense ultraviolet light. Many Saussurea originate from exposed, cool sites and those adaptations give clear cultivation clues: choose an open position that reproduces sharp alpine conditions where possible, and avoid heavy, poorly drained soil for species from rocky habitats. The dense floral wool and compact alpine forms make several species suitable for rock gardens and scree beds; larger, thistle-like types can be placed toward the back of mixed borders where their terminal heads are visible. Expect flowers from July to September, and select the species form to match the intended use, from miniature rosettes for crevices to tall specimens for vertical structure. Select plants with known provenance for the right site: alpine-origin Saussurea benefit from gritty, free-draining mixes and exposure to strong light, while lower-altitude species may tolerate less extreme positions. The woolly heads are diagnostic—pick forms with the floral texture and colour range you want in the garden.