Switzerland · founded 1998

Mr. Nice Seedbank

Mr. Nice Seedbank is the breeding program established in 1998 by Shantibaba (Scott Blakey) and Howard Marks, drawing on the master breeding work Shantibaba did at Green House Seed Company before leaving in 1998 over a dispute about the direction of the genetics program. The catalogue is built around stabilized open-pollination work using the original mother stock that Shantibaba carried out of Green House, including the parent plants behind White Widow, Super Silver Haze, and Hash Plant Haze. Critical Mass, the breeder's reworking of an original Big Bud project, became one of the highest-yielding indica-dominant photoperiod lines in the European market and remains the strain most growers associate with the bank. Mr. Nice releases seeds in regular (non-feminized) form almost exclusively, which sets the program apart from nearly every other commercial Dutch and Swiss bank and which preservation growers consider a marker of breeding integrity. The bank operates out of Switzerland with the breeding work documented in Howard Marks's posthumous archives and in Shantibaba's own writing through the Mr. Nice forum.

Reviewed 2026-05-23