Buddleja farreri is a xerophytic deciduous shrub endemic to Gansu, China, discovered by Reginald Farrer in 1915.

Farrer described the shrub's habitat as "..the very hottest and driest crevices, cliffs, walls and banks down the most arid and torrid aspects of the Ha Shin Fang".

Buddleja farreri is a deciduous shrub of sparse habit which, left unpruned, grows to a large size.

The flowers appear on the old wood before the leaves at the nodes of the previous year's growth, during April in the UK.

[6] A large specimen is grown as part of the NCCPG national collection of Buddleja at Longstock Garden Nursery, near Stockbridge, Hampshire, England.