Ixora is grown for its foliage and the structure it brings to a planting. It's hardy across USDA zones 10 through 11 and grows just as well in a container as in the ground. Its spring flowers are a moderate draw for honeybees, butterflies, and hummingbirds.
Ixora — the short answer
Ixora: grown in zones 10–11, full sun, pH 4.5–6.
- USDA zones
- 10–11
- Not verified — NC State Extension Gardener Plant Toolbox lists zones 9a–11b
- Soil pH
- 4.5–6
- Growable Ground Plant Database
- Sun
- Full Sun
- Growable Ground Plant Database
- Frost-kill temp (growing season)
- 50°F
- Growable Ground Plant Database
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 Ixora on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether ixora actually takes — and those shift from one yard to the next. Enter your address and we'll score ixora against your land's real conditions.
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What Ixora is
Ixora grows as a perennial and reaches around six feet at maturity. It blooms red in spring. It's also well suited to containers.
How to grow Ixora
Ixora grows in USDA zones 10 through 11. Ixora does best in full sun — at least 6 hours of direct sun a day — and soil from pH 4.5 to 6, on well-drained ground.
USDA Zones
10-11
Not verified — NC State Extension Gardener Plant Toolbox lists zones 9a–11b
Soil pH
4.5 - 6
Growable Ground Plant Database
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Frost Kill Temperature
50°F
Where cold starts killing growing tissue. Not a winter-survival floor — a dormant perennial takes far colder, which its hardiness zone answers.
Growable Ground Plant Database
Mature Height
6 ft
Growable Ground plant catalog
Start the season right
Plant ixora in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Ixora prefers pH 4.5 to 6 (Growable Ground Plant 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.
Keep it in good form
Prune ixora to shape as it grows; the reward is its foliage and structure, not a harvest, so steady upkeep is the whole job.
Where Ixora thrives
Ixora is hardy across USDA zones 10 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.
A USDA zone is a 10°F band of average annual extreme winter minimum, so zones 10–11 spans average winter lows from 30°F to 50°F (USDA PHZM 2023). Across the 50 states and DC, that band covers none outright but splits 8 down the middle — and which side of that line your land sits on changes the answer.
Zones 10–11·Where Ixora 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 Ixora stands, state by state
Ixora is rated for zones 10–11 — a cold floor USDA puts at 30 to 40°F. Across the 50 states and DC, 0 sit fully inside that band, the line runs through 8 more, and 43 sit outside it — and inside every split state, the same line runs on at county grain.
The line runs through
8 states
- California · zones 4b-11a
- Nevada · zones 4a-10a
- Arizona · zones 5b-10b
3 of 8 shown
Ixora’s band covers part of each of these states — which side of the line your county sits on changes the answer, and each state page draws it.
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 Ixora
Growing guides for ixora
Good to know
Good news for pet owners — ixora isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Ixora offers moderate value to bees and other pollinators.
Your land is one point inside Ixora'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 Ixora will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether ixora 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 Ixora
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 Ixora in my zone?
Ixora grows in USDA hardiness zones 10 through 11. Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.
When should you plant Ixora?
Most growers plant ixora after the last spring frost, once the soil has warmed. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
How much sun does Ixora need?
Ixora 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 Ixora need?
Ixora prefers soil pH 4.5 to 6, on well-drained ground (Growable Ground Plant Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Ixora attract pollinators?
Yes — ixora's flowers are a solid nectar source for honeybees, butterflies, and hummingbirds.
Is Ixora safe for pets?
Ixora is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)