What's your humidity like? I used to live up there, but don't remember enough of the climate.
***EDIT***
It could be luck of the draw with plant genetics. Some grow true, and others don't.
It's Zero Dark Thirty.. can't sleep. So what do I do? I make some coffee, and sit here enjoying the cool 55°F / 13°C temps with the windows open, an LED lantern on low... keeping it dark... waiting for the sun to rise.