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.
Marjoram — the short answer
Marjoram: grown in zones 9–10, full sun, pH 4.9–8.7, about 70 days to maturity.
- USDA zones
- 9–10
- NC State Extension Gardener Plant Toolbox
- Soil pH
- 4.9–8.7
- FAO ECOCROP
- Sun
- Full Sun
- NC State Extension Gardener Plant Toolbox
- Days to Maturity
- 70 days
- We haven't confirmed this against a published source yet.
- Frost-kill temp (growing season)
- 32°F
- FAO ECOCROP
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — each tile names its own row's source, because per-field provenance varies.
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.
Mature height, bloom period, flower colour and container suitability: We haven't confirmed this against a published source yet.
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, which is why climate matters as much as soil.
USDA Zones
9-10
NC State Extension Gardener Plant Toolbox
Soil pH
4.9 - 8.7
FAO ECOCROP
Sun
Full Sun
NC State Extension Gardener Plant Toolbox
Drainage
well (dry spells)
FAO ECOCROP
Frost Kill Temperature
32°F
Where cold starts killing growing tissue. Not a winter-survival floor — a dormant perennial takes far colder, which its hardiness zone answers.
FAO ECOCROP
Minimum Growing Temperature
50°F
Below this it stops growing rather than dies — a pace limit, not a survival limit.
FAO ECOCROP
Days to Maturity
70 days
Sweet marjoram; tender perennial; annual in cold zones.
We haven't confirmed this against a published source yet.
GDD Required
1200+
Growing degree-days of accumulated warmth it needs to mature — humid summers reach this faster than cool coastal ones.
We haven't confirmed this against a published source yet.
Mature Height
1.5 ft
We haven't confirmed this against a published source yet.
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. We haven't confirmed this against a published source yet. A 2–3 inch mulch layer holds moisture without waterlogging.
Harvest at maturity
Marjoram is ready about 70 days after planting. We haven't confirmed this against a published source yet. Snip sprigs as you need them — regular cutting keeps the foliage tender and slows it bolting to flower.
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.
A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 9–10 spans average winter lows from 20°F to 40°F (USDA PHZM 2023). Across the 50 states and DC, that band covers none outright but splits 17 down the middle — and which side of that line your land sits on changes the answer.
Zones 9–10·Where Marjoram growsOpen map →
This map is derived from the USDA ARS / PRISM Plant Hardiness Zone Map (2023) and is not the official USDA Plant Hardiness Zone Map.
Where Marjoram stands, state by state
Marjoram is rated for zones 9–10 — a cold floor USDA puts at 20 to 30°F. Across the 50 states and DC, 0 sit fully inside that band, the line runs through 17 more, and 34 sit outside it — and inside every split state, the same line runs on at county grain.
The line runs through
17 states
- Alaska · zones 1a-9a
- California · zones 4b-11a
- Nevada · zones 4a-10a
3 of 17 shown
Marjoram’s band covers part of each of these states — which side of the line your county sits on changes the answer, and each state page draws it.
State zone extents: USDA Plant Hardiness Zone Map (PHZM) 2023. A zone is a 10°F band of average annual extreme minimum temperature, so a state that splits the band contains the boundary — its own page draws the county line, and a parcel report resolves which side your land sits on.
What grows around Marjoram
Growing guides for marjoram
Good to know
One caution for pet owners — marjoram is toxic to dogs and cats. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: NC State Extension Gardener Plant Toolbox.)
Marjoram is a standout pollinator plant — high value to bees and other pollinators. We haven't confirmed this against a published source yet.
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 8 federal source types across roughly 950K 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.
Your land is one point inside Marjoram's range
This page resolves to the species. Your state page draws the county line, and a report reads the parcel — the soil pH, drainage, sun, and frost dates on your exact ground, which no species average can see.
See if Marjoram will thrive on your land
Zone averages are a start. Your soil pH, drainage, sun exposure, and frost dates shape whether marjoram actually takes. We score it against the mapped and modelled 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.
25+ data sources analyzed in seconds
How we know this about Marjoram
The figures above are cited per row, not per site: the pH band names this plant’s own source column, the three temperature figures each carry their own, and days-to-maturity cites the publication that actually lists it. All of it comes from the Growable Ground Plant Database — a compilation over FAO ECOCROP, USDA PLANTS, and university Extension sources, published openly with per-field provenance.
Grounded inUSDA PLANTS Database
Frequently asked questions
Can I grow Marjoram in my zone?
Marjoram grows in USDA hardiness zones 9 through 10 (NC State Extension Gardener Plant Toolbox). 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. We haven't confirmed this against a published source yet. 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. 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 mapped 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. We haven't confirmed this against a published source yet.
Is Marjoram safe for pets?
Marjoram is toxic to dogs and cats. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: NC State Extension Gardener Plant Toolbox.)
Keep exploring Marjoram
Marjoram state by state
Every state marjoram's zone reaches — 5 link straight to that state's marjoram growing page; the rest open the state's full growing guide.