Bitter Melon is grown for its fruit, ready to harvest about 70 days after planting. It's hardy across USDA zones 4 through 12 and stands up to deer. Its flowers are a moderate draw for honeybees and native bees, even though the fruit is the prize. As a cucurbit (squash, melon, and cucumber), give it a fresh bed each year — away from where its relatives just grew — so the soil-borne pests and diseases of the family never get a foothold.
Bitter Melon — the short answer
Bitter Melon: grown in zones 4–12, full sun, pH 4.5–8, about 70 days to maturity.
- USDA zones
- Grown as an annual — see the growing season
- Growing season, not a hardiness zone
- Soil pH
- 4.5–8
- FAO ECOCROP
- Sun
- Full Sun
- Growable Ground Plant Database
- Days to Maturity
- 70 days
- Growable Ground Plant Database
- Frost-kill temp (growing season)
- 37.4°F
- FAO ECOCROP
Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — each tile names its own row's source, because per-field provenance varies.
Score Bitter Melon on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether bitter melon actually takes — and those shift from one yard to the next. Enter your address and we'll score bitter melon 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 parcel report in seconds — read in full free for your first 14 days
What Bitter Melon is
Bitter Melon reaches around twelve feet at maturity. It's also deer-resistant.
How to grow Bitter Melon
Bitter Melon grows in USDA zones 4 through 12 and is ready to harvest about 70 days after planting. Bitter Melon does best in full sun — at least 6 hours of direct sun a day — and soil from pH 4.5 to 8, on well-drained ground. It needs around 2,500 growing degree days to mature and a growing season of at least 50 frost-free days, which is why climate matters as much as soil.
USDA Zones
Grown as an annual — see the growing season
Soil pH
4.5 - 8
FAO ECOCROP
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Frost Kill Temperature
37.4°F
Where cold starts killing growing tissue. Not a winter-survival floor — a dormant perennial takes far colder, which its hardiness zone answers.
FAO ECOCROP
Minimum Growing Temperature
59°F
Below this it stops growing rather than dies — a pace limit, not a survival limit.
FAO ECOCROP
Days to Maturity
70 days
Growable Ground plant catalog
GDD Required
2500+
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
12 ft
Growable Ground plant catalog
Frost-Free Days
50+
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 bitter melon in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Bitter Melon prefers pH 4.5 to 8 (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
Bitter Melon is ready about 70 days after planting. Pick when the fruit is full-colored and parts easily from the stem.
Where Bitter Melon thrives
On hardiness alone, bitter melon grows across most of the country — its range (USDA zones 4 through 12) is unusually wide. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.
A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 4–12 spans average winter lows from -30°F to 60°F (USDA PHZM 2023). Across the 50 states and DC, that band covers 40 outright and splits 11 more down the middle — and which side of that line your land sits on changes the answer.
Zones 4–12·Where Bitter Melon growsOpen map →
This map is derived from the USDA ARS / PRISM Plant Hardiness Zone Map (2023) and is not the official USDA Plant Hardiness Zone Map.
Where Bitter Melon stands, state by state
Bitter Melon is rated for zones 4–12 — a cold floor USDA puts at -30 to -20°F. Across the 50 states and DC, 40 sit fully inside that band, the line runs through 11 more, and 0 sit outside it — and inside every split state, the same line runs on at county grain.
Fully inside zones 4–12
40 states
- California · zones 4b-11a
- Iowa · zones 4b-6a
- Michigan · zones 4a-7a
3 of 40 shown
State zone extents: USDA Plant Hardiness Zone Map (PHZM) 2023. A zone is a 10°F band of average annual extreme minimum temperature, so a state that splits the band contains the boundary — its own page draws the county line, and a parcel report resolves which side your land sits on.
What grows around Bitter Melon
Growing guides for bitter melon
In rotation planning, bitter melon counts as a Cucurbit — beds recover best when cucurbit crops don’t follow each other in the same spot year over year. (Growable Ground derivation — crop-rotation group from botanical family)
Related plants in vegetable
Good to know
One caution for pet owners — bitter melon 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: Cornell Poisonous Plants Database.)
Bitter Melon offers moderate value to bees and other pollinators.
Before you harvest bitter melon, 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 bitter melon for food. Our free screen reads 8 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.
Your land is one point inside Bitter Melon's range
This page resolves to the species. Your state page draws the county line, and a report reads the parcel — the soil pH, drainage, sun, and frost dates on your exact ground, which no species average can see.
See if Bitter Melon will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether bitter melon 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
How we know this about Bitter Melon
The figures above are cited per row, not per site: the pH band names this plant’s own source column, the three temperature figures each carry their own, and days-to-maturity cites the publication that actually lists it. All of it comes from the Growable Ground Plant Database — a compilation over FAO ECOCROP, USDA PLANTS, and university Extension sources, published openly with per-field provenance.
Grounded inUSDA PLANTS Database•ASPCA
Frequently asked questions
Can I grow Bitter Melon in my zone?
Bitter Melon is grown as an annual, so a hardiness zone does not decide it — its growing season follows your last and first frost dates. Soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.
How long does Bitter Melon take to grow?
Bitter Melon is ready to harvest about 70 days after planting. Your local frost dates and soil temperature move that window earlier or later.
When should you plant Bitter Melon?
Most growers plant bitter melon after the last spring frost, once the soil has warmed, leaving enough of the season for its 50-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 Bitter Melon need?
Bitter Melon 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 Bitter Melon need?
Bitter Melon prefers soil pH 4.5 to 8, on well-drained ground (FAO ECOCROP). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Bitter Melon attract pollinators?
Yes — bitter melon's flowers are a solid nectar source for honeybees and native bees.
Is Bitter Melon safe for pets?
Bitter Melon is toxic to dogs and cats with mild severity. Keep it out of reach, and call ASPCA Animal Poison Control at (888) 426-4435 in an emergency. (Source: Cornell Poisonous Plants Database.)
Keep exploring Bitter Melon
Bitter Melon state by state
Every state bitter melon's zone reaches — 29 link straight to that state's bitter melon growing page; the rest open the state's full growing guide.