Where it's in season
September
Peak nowComing into seasonEnding soonAvailable longerOut of season
Faintly-shaded regions don't have seasonality data for this item yet.
Sources & confidence
A seasonal guide, not a live inventory — see each region's source below. "Verified" means confirmed by a real Grano producer, market, or authoritative local source; other levels are regional or general agricultural knowledge.
Great Lakes · Regional estimate · General Midwest horticultural/extension consensus (multiple university extension programs agree on these approximate windows; not independently verified against one named document this session)
Grano Network
No Grano producers list horseradish yet — check back as the season gets closer.
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