Growing Jerusalem Artichokes, also Sunchoke

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30 Sep 23 Lynn (Canada - Zone 4b Temperate Warm Summer climate)
I grew this plant from seed and planted them a few years ago. They grew very tall but did not flower yet and there are no tubers at all. Any suggestions on why there are no tubers to harvest after at least 2 years in the ground. Thanks for your help. Lynn
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