Kumquat is a perennial grown for its fruit. It's hardy across USDA zones 8 through 11 and stands up to deer. Its spring 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
8-11
pH Range
5.5-8.3
Sun
Full Sun
Days to Maturity
---
Score Kumquat on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether kumquat actually takes — and those shift from one yard to the next. Enter your address and we'll score kumquat 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 Kumquat is
Kumquat grows as a perennial and reaches around ten feet at maturity. It blooms white in spring. It's also deer-resistant.
How to grow Kumquat
Kumquat grows in USDA zones 8 through 11. Kumquat 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 around 3,000 growing degree days to mature, a growing season of at least 140 frost-free days, and about 0 hours of winter chill to set fruit, which is why climate matters as much as soil.
USDA Zones
8-11
USDA PHZM 2023
Soil pH
5.5 - 8.3
USDA PLANTS Database
Sun
Full Sun
plant_species_v5.csv
Drainage
well (dry spells)
plant_species_v5.csv
Frost Tolerance
53.6°F
plant_species_v5.csv
GDD Required
3000+
plant_species_v5.csv
Mature Height
10 ft
plant_species_v5.csv
Chill Hours
0+
plant_species_v5.csv
Frost-Free Days
140+
plant_species_v5.csv
Start the season right
Plant kumquat in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Kumquat prefers pH 5.5 to 8.3 (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.
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 — kumquat 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.)
Kumquat is a standout pollinator plant — high value to bees and other pollinators. (Source: Xerces Society, Pollinator Partnership.)
Where Kumquat thrives
Kumquat is hardy across USDA zones 8 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 8–11·Where Kumquat growsOpen map →
On USDA hardiness-zone overlap, Kumquat can grow in these states:
See if Kumquat will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether kumquat 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 Kumquat in my zone?
Kumquat grows in USDA hardiness zones 8 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 Kumquat?
Most growers plant kumquat 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 Kumquat need?
Kumquat 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 Kumquat need?
Kumquat prefers soil pH 5.5 to 8.3, on well-drained ground (USDA PLANTS Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Kumquat attract pollinators?
Yes — kumquat's flowers are a strong nectar and pollen source for honeybees (Xerces Society, Pollinator Partnership).
Is Kumquat safe for pets?
Kumquat 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.