Rapeseed 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
Sun
Full Sun
Days to Maturity
75
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What Rapeseed is
Rapeseed grows as an annual and reaches around four feet at maturity. It blooms in late spring.
How to grow Rapeseed
Rapeseed grows in USDA zones 4 through 10. Rapeseed does best in full sun — at least 6 hours of direct sun a day — and soil from pH 5 to 8, on well-drained ground. It needs around 1,000 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
4-10
USDA PHZM 2023
Soil pH
5 - 8
USDA PLANTS Database
Sun
Full Sun
plant_species_v5.csv
Drainage
well (dry spells)
plant_species_v5.csv
Days to Maturity
75 days
Rapeseed / canola; cool-season cover; biofumigant. Days = typical establishment to flowering.
SARE; USDA-NRCS
GDD Required
1000+
plant_species_v5.csv
Mature Height
4 ft
plant_species_v5.csv
Frost-Free Days
90+
plant_species_v5.csv
Start the season right
Plant rapeseed in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Rapeseed prefers pH 5 to 8 (USDA PLANTS Database). 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 rapeseed 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 — rapeseed isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Rapeseed offers moderate value to bees and other pollinators. (Source: Xerces Society, Pollinator Partnership.)
Where Rapeseed thrives
Rapeseed 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 Rapeseed growsOpen map →
On USDA hardiness-zone overlap, Rapeseed can grow in these states:
See if Rapeseed will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether rapeseed 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 Rapeseed in my zone?
Rapeseed 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 Rapeseed?
Most growers plant rapeseed 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 Rapeseed need?
Rapeseed 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 Rapeseed need?
Rapeseed prefers soil pH 5 to 8, on well-drained ground (USDA PLANTS Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Rapeseed attract pollinators?
Yes — rapeseed's flowers are a solid nectar source for honeybees and native bees (Xerces Society, Pollinator Partnership).
Is Rapeseed safe for pets?
Rapeseed is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.