Sour Orange is a perennial grown for its fruit. It's hardy across USDA zones 9 through 11. Its flowers are a real draw for honeybees, even though the fruit is the prize. It roots deep, which helps it reach moisture in a dry spell and open up tight soil as it establishes.
Zones
9-11
pH Range
5.5-8.3
Sun
Full Sun
Days to Maturity
---
Score Sour Orange on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether sour orange actually takes — and those shift from one yard to the next. Enter your address and we'll score sour orange against your land's real conditions.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
What Sour Orange is
Sour Orange grows as a perennial.
How to grow Sour Orange
Sour Orange grows in USDA zones 9 through 11. Sour Orange does best in full sun — at least 6 hours of direct sun a day — and soil from pH 5.5 to 8.3, on well-drained ground. It needs a growing season of at least 140 frost-free days, which is why climate matters as much as soil.
USDA Zones
9-11
USDA PHZM 2023
Soil pH
5.5 - 8.3
USDA PLANTS Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Frost Tolerance
53.6°F
The lowest temperature it shrugs off — below this, expect damage without cover.
Growable Ground plant catalog
Frost-Free Days
140+
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 sour orange in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Sour Orange prefers pH 5.5 to 8.3 (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.
Harvest at maturity
Pick when the fruit is full-colored and parts easily from the stem. Local Cooperative Extension guides publish timing tables.
Good to know
One caution for pet owners — sour orange is toxic to dogs and cats (mild severity). Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)
Sour Orange is a standout pollinator plant — high value to bees and other pollinators.
Before you harvest sour orange, 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 sour orange for food. Our free screen reads 9 federal source types across roughly 1.8M 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.
Where Sour Orange thrives
Sour Orange is hardy across USDA zones 9 through 11. 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 9–11·Where Sour Orange growsOpen map →
On USDA hardiness-zone overlap, Sour Orange can grow in these states:
See if Sour Orange will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether sour orange 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.
25+ data sources analyzed in seconds
Frequently Asked Questions
Can I grow Sour Orange in my zone?
Sour Orange grows in USDA hardiness zones 9 through 11 (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 Sour Orange?
Most growers plant sour orange after the last spring frost, once the soil has warmed, leaving enough of the season for its 140-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 Sour Orange need?
Sour Orange 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 Sour Orange need?
Sour Orange prefers soil pH 5.5 to 8.3, on well-drained ground (FAO ECOCROP). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Sour Orange attract pollinators?
Yes — sour orange's flowers are a strong nectar and pollen source for honeybees.
Is Sour Orange safe for pets?
Sour Orange is toxic to pets (dogs,cats) with mild severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: ASPCA.)