Growing Sweet Marjoram: A Complete Profile
By Growing Home Greens Team · July 29, 2026
Sweet marjoram is oregano’s gentler relative: same genus, much less aggressive flavour, sweeter and more floral. It’s the herb that works in things oregano would bulldoze, like egg dishes, buttered carrots, and anything with cream in it.
The catch is that it’s a tender perennial. Outdoors it only survives winter in zones 9 and 10. Everywhere else it’s an annual whether you intended that or not.
Sowing it
Start indoors about seven weeks before your last frost. Sow on the surface and leave it uncovered, because it needs light to germinate and the seed is small enough that a covering of compost is a burial.
Set transplants out about a week after your last frost. It wants warmth and won’t do anything useful until the soil has some in it. Around 65 days to a usable harvest.
Plant it densely. Marjoram is small, and a group of plants gives you enough to cook with.
Keeping it worth growing
The single thing that separates a good marjoram plant from a disappointing one is harvesting. Pinch the leafy tops regularly, starting before you think the plant is big enough. Every pinch forces branching. Left alone, it puts up one leggy stem, flowers, and stops making the leaves you wanted.
Once it flowers the flavour drops off. The flowers are pretty and the bees like them, so it’s a genuine trade rather than a mistake, but if you’re growing marjoram to eat, keep pinching the buds out.
What goes wrong
It dies over winter and you think you killed it. In zones 8 and below, it was always going to. This isn’t a failed overwintering, it’s the plant’s normal life span in your climate. Plan to sow again.
It’s leggy and sparse. Not enough pinching, or not enough sun. Both, usually.
It rots at the base. Marjoram is Mediterranean and wants sharp drainage. It will forgive you forgetting to water it long before it forgives wet feet. If your soil is heavy, grow it in a pot.
If you want to keep a plant rather than resow, take cuttings in late summer or lift the whole thing into a pot and bring it onto a windowsill. It sulks indoors but survives, and gives you a head start in spring.
Where to put it
Full sun, free-draining soil, and close to the kitchen door, because the herbs you use are the ones you can reach without putting shoes on.
Marjoram has no well-established companion pairings, and nothing it needs to be kept away from. It’s compact enough to work as an herb-bed filler in the Garden Designer without needing dedicated space.
Sources: Marjoram, Sweet, Illinois Extension; Origanum majorana, NC State Extension Gardener Plant Toolbox.
Companion planting guide for Marjoram (Sweet) · Find your planting dates
Typically viable in USDA zones 4-10. Not sure your zone? Look it up by ZIP code.
Mature height: 0.5-1 ft
Method: Start indoors: Start indoors from seed, then transplant outside. It needs a head start most zones can't give it by direct-sowing alone.
When to plant marjoram (sweet), by zone
Every zone marjoram (sweet) grows in. Pick your zone in the header and it will be highlighted here. Each zone links to its full page.
| Zone | Start indoors | Sow or plant out | Harvest |
|---|---|---|---|
| 4a & 4b | Mar 27–Apr 3 | May 22–May 29 | Jul 26–Aug 2 |
| 5a & 5b | Mar 22–Mar 29 | May 17–May 24 | Jul 21–Jul 28 |
| 6a & 6b | Mar 7–Mar 14 | May 2–May 9 | Jul 6–Jul 13 |
| 7a & 7b | Feb 20–Feb 27 | Apr 17–Apr 24 | Jun 21–Jun 28 |
| 8a & 8b | Feb 4–Feb 11 | Apr 1–Apr 8 | Jun 5–Jun 12 |
| 9a & 9b | Dec 28–Jan 4 | Feb 22–Mar 1 | Apr 28–May 5 |
| 10a & 10bSpring window | Not usually | Feb–Apr | ~65 days after transplanting |
| Fall window | Not usually | Oct–Nov | ~65 days after transplanting |
Harvest dates are about 65 days after the sow or plant-out date, not after starting seeds indoors.
See exact start-indoors, direct-sow, and harvest dates for your zone →
How many Marjoram (Sweet) plants fit per square foot?
Spacing: 4 per square foot (square-foot-gardening spacing). Mature height: 0.5-1 ft.
Varieties worth considering
- Sweet marjoram (Origanum majorana): Buy it by the botanical name. 'Marjoram' on a label can also mean pot marjoram (Origanum onites) or wild marjoram, which is just oregano. Only O. majorana has the sweet, mild flavour people are after. (source) Buy seeds: True Leaf Market · Burpee · High Mowing Organic Seeds
- 'Zaatar' sweet marjoram (best for: zesty flavor): Johnny's Selected Seeds sells this as a Mediterranean-native selection with a more zesty flavor than the plain species, a good second planting if the mild standard type isn't punchy enough for cooking. (source)
Why each variety is listed comes from the source shown next to it. We haven't grown these ourselves yet, so treat this as a research-backed starting point, not a personal endorsement. The buy links are separate from those sources: they go to seed suppliers that sell that exact variety, and we may earn a commission on some of them.
Where to buy marjoram seeds
Botanical Interests · True Leaf Market · Burpee · High Mowing Organic Seeds (each supplier's marjoram seeds)
The varieties we recommend above each have their own buy links, for the suppliers that sell that exact variety.
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See it growing
Search YouTube for "growing marjoram (sweet)" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
%3A%20Sweet%20marjoram%20is%20oregano%20with%20the%20volume%20turned%20down%2C%20and%20it%20dies%20in%20most%20winters.%20How%20to%20sow%20it%2C%20how%20to%20keep%20it%20bushy%2C%20and%20how%20to%20keep%20a%20plant%20going%20year%20to%20year.)
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Growing Marjoram (Sweet): Sweet marjoram is oregano with the volume turned down, and it dies in most winters. How to sow it, how to keep it bushy, and how to keep a plant going year to year.
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