Marjoram is a perennial culinary herb, grown for the flavor it brings to the kitchen, ready to harvest about 70 days after planting. It's hardy across USDA zones 9 through 10, stands up to deer and grows just as well in a container as in the ground. Its summer flowers are a real draw for honeybees, native bees, and butterflies, even though the harvest is the prize.
Zones
9-10
pH Range
4.9-8.7
Sun
Full Sun
Days to Maturity
70
Score Marjoram on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether marjoram actually takes — and those shift from one yard to the next. Enter your address and we'll score marjoram against your land's real conditions.
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What Marjoram is
Marjoram grows as a perennial and reaches around a foot and a half at maturity. It blooms white in summer. It's also deer-resistant and well suited to containers.
How to grow Marjoram
Marjoram grows in USDA zones 9 through 10 and is ready to harvest about 70 days after planting. Marjoram does best in full sun — at least 6 hours of direct sun a day — and soil from pH 4.9 to 8.7, on well-drained ground. It needs around 1,200 growing degree days to mature and a growing season of at least 90 frost-free days, which is why climate matters as much as soil.
USDA Zones
9-10
USDA PHZM 2023
Soil pH
4.9 - 8.7
USDA PLANTS Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Frost Tolerance
50°F
The lowest temperature it shrugs off — below this, expect damage without cover.
Growable Ground plant catalog
Days to Maturity
70 days
Sweet marjoram; tender perennial; annual in cold zones.
UMD-Herb; RHS
GDD Required
1200+
Growing degree-days of accumulated warmth it needs to mature — humid summers reach this faster than cool coastal ones.
Growable Ground plant catalog
Mature Height
1.5 ft
Growable Ground plant catalog
Frost-Free Days
90+
The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.
Growable Ground plant catalog
Start the season right
Plant marjoram in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Marjoram prefers pH 4.9 to 8.7 (FAO ECOCROP). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.
Water steadily
Keep the root zone evenly moist through establishment. A 2–3 inch mulch layer holds moisture without waterlogging.
Harvest at maturity
Marjoram is ready about 70 days after planting (UMD-Herb; RHS). Snip sprigs as you need them — regular cutting keeps the foliage tender and slows it bolting to flower.
Good to know
Good news for pet owners — marjoram isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Marjoram is a standout pollinator plant — high value to bees and other pollinators. (Source: Pollinator Partnership.)
Before you harvest marjoram, know your soil
Anything you grow to eat takes up what's in the ground it grows in, so it's worth knowing what's documented near you before you plant marjoram for food. Our free screen reads 9 federal source types across roughly 1.8M indexed sites and shows which sit near your address and which way they drain. It's a screening estimate from public records and proximity — not a soil test — so a nearby record means a soil test is worth it, not that your soil is unsafe.
Where Marjoram thrives
Marjoram is hardy across USDA zones 9 through 10. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.
Zones 9–10·Where Marjoram growsOpen map →
On USDA hardiness-zone overlap, Marjoram can grow in these states:
See if Marjoram will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether marjoram actually takes — we score it against the real conditions at your address.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Frequently Asked Questions
Can I grow Marjoram in my zone?
Marjoram grows in USDA hardiness zones 9 through 10 (USDA PHZM 2023). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.
How long does Marjoram take to grow?
Marjoram is ready to harvest about 70 days after planting (UMD-Herb; RHS). Your local frost dates and soil temperature move that window earlier or later.
When should you plant Marjoram?
Most growers plant marjoram after the last spring frost, once the soil has warmed, leaving enough of the season for its 90-day frost-free need. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Marjoram need?
Marjoram needs full sun — a spot that catches at least 6 hours of direct summer sun a day. In more shade it still grows, but usually gives a smaller, later crop. The catch is that a yard rarely gets even light everywhere — a fence, the house, or one tall tree can quietly take those hours. A Growable Ground report reads the real sun-hours across your land, canopy and buildings included, so you can pick the brightest bed before you plant.
What soil does Marjoram need?
Marjoram prefers soil pH 4.9 to 8.7, on well-drained ground (FAO ECOCROP). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Marjoram attract pollinators?
Yes — marjoram's flowers are a strong nectar and pollen source for honeybees, native bees, and butterflies. (Source: Pollinator Partnership.)
Is Marjoram safe for pets?
Marjoram is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)