Ethiopian Mustard is a cover crop — grown to build and protect the soil rather than for a harvest of its own. It's hardy across USDA zones 4 through 10. Its late spring flowers are a moderate draw for honeybees and native bees.
Zones
4-10
pH Range
5-8.5
Sun
Full Sun
Days to Maturity
90
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Zone averages can't see the slope, soil, frost, and sun that decide whether ethiopian mustard actually takes — and those shift from one yard to the next. Enter your address and we'll score ethiopian mustard against your land's real conditions.
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What Ethiopian Mustard is
Ethiopian Mustard grows as an annual or biennial and reaches around four feet at maturity. It blooms in late spring.
How to grow Ethiopian Mustard
Ethiopian Mustard grows in USDA zones 4 through 10. Ethiopian Mustard does best in full sun — at least 6 hours of direct sun a day — and soil from pH 5 to 8.5, on well-drained ground. It needs around 1,400 growing degree days to mature, which is why climate matters as much as soil.
USDA Zones
4-10
USDA PHZM 2023
Soil pH
5 - 8.5
USDA PLANTS Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Frost Tolerance
41°F
The lowest temperature it shrugs off — below this, expect damage without cover.
Growable Ground plant catalog
Days to Maturity
90 days
Growable Ground plant catalog
GDD Required
1400+
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
4 ft
Growable Ground plant catalog
Frost-Free Days
0+
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 ethiopian mustard in full sun with at least 6 hours of direct sun. It grows in the cool halves of the year, so sow it in spring or late summer rather than waiting for midsummer heat.
Match the soil
Ethiopian Mustard prefers pH 5 to 8.5 (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.
Turn it in before it seeds
Cut ethiopian mustard down or turn it into the soil before it sets seed, while the growth is still green — that's when it returns the most to the ground.
Good to know
Good news for pet owners — ethiopian mustard isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Ethiopian Mustard offers moderate value to bees and other pollinators. (Source: Pollinator Partnership.)
Where Ethiopian Mustard thrives
Ethiopian Mustard is hardy across USDA zones 4 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 4–10·Where Ethiopian Mustard growsOpen map →
On USDA hardiness-zone overlap, Ethiopian Mustard can grow in these states:
See if Ethiopian Mustard will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether ethiopian mustard 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 Ethiopian Mustard in my zone?
Ethiopian Mustard grows in USDA hardiness zones 4 through 10 (USDA PHZM 2023). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.
When should you plant Ethiopian Mustard?
Ethiopian Mustard is a cool-season crop, so it goes in during the cool halves of the year — early spring, and again in late summer for a fall planting — rather than at the height of summer heat. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Ethiopian Mustard need?
Ethiopian Mustard 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 Ethiopian Mustard need?
Ethiopian Mustard prefers soil pH 5 to 8.5, on well-drained ground (FAO ECOCROP). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Ethiopian Mustard attract pollinators?
Yes — ethiopian mustard's flowers are a solid nectar source for honeybees and native bees. (Source: Pollinator Partnership.)
Is Ethiopian Mustard safe for pets?
Ethiopian Mustard is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)