Henna is grown for its foliage and the structure it brings to a planting. It's hardy across USDA zones 13 through 13. Its spring flowers are a moderate draw for honeybees, native bees, and butterflies.
Henna — the short answer
Henna: grown in zones 13–13, full sun, pH 4.3–8.
- USDA zones
- 13–13
- Manual horticultural correction (source not retained); NC State Extension and Missouri Botanical Garden, with the remaining rows from other published sources or Growable Ground compilation
- Soil pH
- 4.3–8
- FAO ECOCROP
- Sun
- Full Sun
- 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 Henna on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether henna actually takes — and those shift from one yard to the next. Enter your address and we'll score henna against your land's real conditions.
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What Henna is
Henna grows as a perennial. It blooms in spring.
How to grow Henna
Henna grows in USDA zones 13 through 13. Henna does best in full sun — at least 6 hours of direct sun a day — and soil from pH 4.3 to 8, on well-drained ground. It needs a growing season of at least 100 frost-free days, which is why climate matters as much as soil.
USDA Zones
13-13
USDA PHZM 2023
Soil pH
4.3 - 8
FAO ECOCROP
Sun
Full Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Minimum Growing Temperature
55.4°F
Below this it stops growing rather than dies — a pace limit, not a survival limit.
FAO ECOCROP
Frost-Free Days
100+
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 henna in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.
Match the soil
Henna prefers pH 4.3 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.
Keep it in good form
Prune henna to shape as it grows; the reward is its foliage and structure, not a harvest, so steady upkeep is the whole job.
Where Henna thrives
Henna is hardy across USDA zones 13 through 13. 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 13–13 spans average winter lows from 60°F to 70°F (USDA PHZM 2023). Across the 50 states and DC, that band covers none outright but splits 1 down the middle — and which side of that line your land sits on changes the answer.
Zone 13
Where Henna grows. USDA's published 2023 PHZM polygons cover the continental US (zones 3a-12a); zones outside that range aren't in the federal map dataset.
Where Henna stands, state by state
Henna is rated for zones 13–13 — a cold floor USDA puts at 60 to 70°F. Across the 50 states and DC, 0 sit fully inside that band, the line runs through 1 more, and 50 sit outside it — and inside every split state, the same line runs on at county grain.
The line runs through
1 state
- Hawaii · zones 8b-13a
Henna’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 Henna
Growing guides for henna
In rotation planning, henna counts as a Other — beds recover best when other crops don’t follow each other in the same spot year over year. (Growable Ground derivation — crop-rotation group from botanical family)
Good to know
One caution for pet owners — henna 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.)
Henna offers moderate value to bees and other pollinators.
Your land is one point inside Henna'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 Henna will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether henna 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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How we know this about Henna
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•USDA PHZM•ASPCA
Frequently asked questions
Can I grow Henna in my zone?
Henna grows in USDA hardiness zones 13 through 13 (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 Henna?
Most growers plant henna after the last spring frost, once the soil has warmed, leaving enough of the season for its 100-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 Henna need?
Henna 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 Henna need?
Henna prefers soil pH 4.3 to 8, on well-drained ground (FAO ECOCROP). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Henna attract pollinators?
Yes — henna's flowers are a solid nectar source for honeybees, native bees, and butterflies.
Is Henna safe for pets?
Henna 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: Cornell Poisonous Plants Database.)