By Pierre Saint-Arnaud SAINT-EUSTACHE, QUE. — Thick, humid air envelopes Myriam Claude’s banana tree, which bears a beautiful cluster of fruit, not yet ripe. Beside it are several trees blossoming with flowers, citrus fruit, and tiny pomegranates waiting to explode with flavour. But Claude’s bounty isn’t in the tropics. It’s in an 8,750-square-foot greenhouse northwest […]