This cultivar is a Tardiana-type hostas developed by Eric Smith in England in the 1960's. Paul Aden of New York registered the plant for Smith in 1976. It is a medium size (14 inches high) hosta with pale lavender flowers from late July into August. This cultivar is part of the "Hadspen Series" of hostas.

The Hostapedia by Mark Zilis (2009) states that this cultivar "...has fooled many a collector. As a young plant the leaf blade has a narrowly elliptic shape, but widens considerably with age."

An article by Warren I. Pollock in The Hosta Journal (1997 Vol. 28 No. 1) states that, "H. 'Blue Blush' is described in nursery catalogues as "small" or "dwarf." In fact, when mature it is neither small nor dwarf. As a young plant, 'Blue Blush' is small, perhaps an 8-inch mound. But after about 5 or so years, it takes off and becomes a medium size plant. The 'Blue Blush' registration by the British Hosta and Hemerocallis Society if for a young - not mature - plant...Sandra Bond says that if you want to keep 'Blue Blush' small, keep dividing it. She adds that 'Hadspen Heron', another in the Tardiana Group, responds in the same way."