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Last edited on November 30, 2025. View history

Za'atar

Origanum syriacum
Also known as bible hyssop (EN) Biblical-hyssop (EN) Lebanese oregano (EN) Syrian oregano (EN)

A variety of oregano

A low, creeping 20 cm perennial culinary herb with woody, often purplish stems and hairy-backed leaves. The whole plant has a strong, warm, aromatic scent and flavour that is kept when it is dried. Sow into trays in spring, prick out at 2.5 cm diagonal spacing at the first two leaves, and transplant at 30 cm diagonal spacing when the ground reaches 15 degrees C.

2
plantings
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harvests
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seed packets
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Za'atar facts

Lifespan

Annual living and reproducing in a single year or less
Optimal temperature 17–28 °C
Absolute temperature 4–32 °C
FAO EcoCrop
Optimal rainfall 700–1300 mm/year
Absolute rainfall 400–2700 mm/year
FAO EcoCrop
Optimal soil pH 5.5–7
Absolute soil pH 4.5–8.7
FAO EcoCrop

Crop cycle

180–300 days
FAO EcoCrop

Optimal light

very bright
FAO EcoCrop
What are growing degree days?

A plant grows with warmth, not with days. A growing degree day is one day's worth of useful warmth: how many degrees the day's average temperature is above the lowest temperature the crop grows at. Add them up from planting and you know how far along the crop is, whatever the calendar says.

Say that lowest temperature is 10°C. A day averaging 17°C gives 7 growing degree days. A day averaging 8°C gives none, as it is too cold for the crop to grow. That is why the same lettuce takes about 50 days in a summer and 90 in an autumn: it needs the same total warmth either way.

For za'atar, the FAO EcoCrop database gives a lowest growing temperature of 4°C and a shortest growing cycle of 180 days at its best temperature, about 3330 growing degree days to a first harvest.

Where you've told us where your garden is, we use this and the weather there to predict when your za'atar will be ready to harvest. We don't use it for how long a plant lives or when it finishes: we go by what members have logged for that.

Growing za'atar

  1. Sow seeds in trays 8 weeks before planting out
  2. Water until established at planting out every week
  3. Pick sprigs at first harvest every 2 weeks
  4. Trim after flowering 8 weeks after first harvest
  5. Divide the clumps 24 months after planting out

How members grow za'atar

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Where za'atar grow

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Za'atar harvests

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Find za'atar seeds

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Time to harvest

If sown now, expect a first harvest in about 180 to 300 days.

From the growing cycle in the FAO EcoCrop database, which is the same wherever it is grown.

Ecological requirements

Data from the FAO EcoCrop database for Origanum vulgare L.

Family / Taxonomy Magnoliopsida
Asteridae
Lamiales
Labiatae
Killing temperature growth: 0 °C, rest: -5 °C
Life form herb
Life span perennial
Habit erect
Optimal soil depth medium (50-150 cm)
Optimal soil texture light
Optimal soil fertility high
Optimal soil drainage well (dry spells)
Optimal soil salinity low (<4 dS/m)
Photoperiod short day (<12 hours), neutral day (12-14 hours), long day (>14 hours)

Learn more about za'atar

Resources outside Growstuff.