A huge crevice garden was built at the Montréal Botanic Gardens, with design from Josef Halda in 2002 and Zdenek Zvolanek in 2004.  Their contributions  gave rise to two different crevice gardens. The presentation will concentrate on how those gardens came about and how they  have evolved over the years, showing both successes and failures so as to  learn from the experience  René was curator of the alpine gardens there from 1993 to 2017.