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When to plant Zinnia in Zone 1b

In Zone 1b, Zinnia: start seeds indoors around May 13–May 27; transplant outdoors around Jun 17–Jun 24; direct sow outdoors around Jun 10–Jun 24. Expect to harvest around Aug 9–Aug 23.

StepWhen
Start seeds indoorsMay 13 – May 27
Transplant outdoorsJun 17 – Jun 24
Direct sow outdoorsJun 10 – Jun 24
HarvestAug 9 – Aug 23
HarvestAug 16 – Aug 23

Tip: A cut-flower workhorse. Direct-sow after frost and pinch young plants for more stems.

Zone 1b averages a last spring frost around Jun 10 and a first fall frost around Aug 20. These are zone averages — look up your ZIP for your exact area.

See the full Zone 1b calendar in the tool →

Other flowers in Zone 1b

Zinnia in nearby zones