While Saxifrage can be found within the Dragon Isles of World of warcraft dragonflight expansion. It is most commonly found within 7 zones and can be used in 19 different recipes from the Dragon Isles. Herbalists with the Dragon isles herbalism skill can learn to pick Saxifrage.
Zones
The Azure Span
The Waking Shore
Ohn’ahran Plains
Thadraszus
The Forbidden Reach
Zaralek Caverns
Emerald Dream
Other farms for herbalists