[c.t.ner]

If I recall the Green candidate in Labrador riding receive ~129 votes in the last election and the difference between the Conservative win and the Liberal candidate was 89 votes.

From a Green's standpoint there really isn't anything to gain from fielding a candidate in the by-election, better to save the resources for bigger battles. But it also works out as Green party has been a lot more receptive to the concept of a one term consolidating of the left-wing vote to switch away from a First Past the post system. If anything this is a symbolic gesture, with zero long term recourse for the party.