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Can You Grow Marjoram in Iowa?

US · USDA Zone 5a · zones 4a, 4b, 5a, 5b

Grows well here

Marjoram grows well here in full sun with well-drained soil — a fragrant, low-maintenance herb.

Plant zones

4a–9b

Iowa last frost

mid-April

Iowa first frost

mid-October

Days to harvest

70–100 days

When to plant Marjorams in Iowa

Start indoors

Feb 17

Transplant

Apr 15

Harvest

Jun 24 – Jul 24

Dates are approximate, based on Iowa's average frost dates. Your exact yard may vary by microclimate.

About Marjoram

Marjoram is oregano's sweeter, milder cousin — a tender perennial herb (grown as an annual in cold zones) with a warm, aromatic flavor perfect for Mediterranean cooking.

Start indoors 6-8 weeks before last frost. Pinch regularly to keep bushy. Harvest before it flowers for best flavor. Bring pots indoors in cold zones.

Full marjoram growing guide →

Gardening in Iowa

Iowa has a humid continental climate with cold winters and warm summers. Most of the state is Zone 5a-5b. Excellent for cool-season crops and hardy fruits.