One of the many, many seedlings from H. 'Sieboldiana', this cultivar was registered by Bob Kuk of Kuk's Forest in Ohio in 1995. The mound of blue-green foliage grows into a large size hosta about 22 inches in height with a spread of 46 inches. Near white flowers bloom from late June into mid-July.

According to The Hostapedia by Mark Zilis (2009), "Bob Kuk's specimen of 'Cool Change' is nothing short of impressive. It has an attractive mound habit, a rich blue foliage color and outstanding substance."