Stewartia is a tree, a long-term addition to the landscape. It's hardy across USDA zones 5 through 8 and shrugs off deer. Its spring flowers are a moderate draw for honeybees and native bees.
Stewartia — the short answer
Stewartia: grown in zones 5–8, part sun, pH 5–7.
- USDA zones
- 5–8
- 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
- 5–7
- Growable Ground Plant Database
- Sun
- Part 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 Stewartia on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether stewartia actually takes — and those shift from one yard to the next. Enter your address and we'll score stewartia against your land's real conditions.
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See Stewartia
What Stewartia is
Stewartia grows as a perennial and reaches around 30 feet at maturity. It blooms white in spring. It's also deer-resistant.
How to grow Stewartia
Stewartia grows in USDA zones 5 through 8. Stewartia does best in part sun — at least 4 hours of direct sun a day — and soil from pH 5 to 7, on well-drained ground. It needs a growing season of at least 160 frost-free days and about 400 hours of winter chill, which is why climate matters as much as soil.
USDA Zones
5-8
USDA PHZM 2023
Soil pH
5 - 7
Growable Ground Plant Database
Sun
Part Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
Mature Height
30 ft
Growable Ground plant catalog
Chill Hours
400+
Winter hours below ~45°F it needs to fruit — too-mild winters can leave it bloom-shy.
Growable Ground plant catalog
Frost-Free Days
160+
The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.
Growable Ground plant catalog
Plant it right
Set stewartia in part sun with well-drained soil. Many fruit trees need a second variety nearby to pollinate — check before you plant just one.
Match the soil
Stewartia prefers pH 5 to 7 (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.
Be patient, then harvest
Prune annually while the tree establishes; fruit trees reward patience with years of harvest. Local Extension guides publish per-cultivar bearing-age tables.
Where Stewartia thrives
Stewartia is hardy across USDA zones 5 through 8. 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 5–8 spans average winter lows from -20°F to 20°F (USDA PHZM 2023). Across the 50 states and DC, that band covers 19 outright and splits 31 more down the middle — and which side of that line your land sits on changes the answer.
Zones 5–8·Where Stewartia 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 Stewartia stands, state by state
Stewartia is rated for zones 5–8 — a cold floor USDA puts at -20 to -10°F. Across the 50 states and DC, 19 sit fully inside that band, the line runs through 31 more, and 1 sits outside it — and inside every split state, the same line runs on at county grain.
Fully inside zones 5–8
19 states
3 of 19 shown
The line runs through
31 states
3 of 31 shown
Stewartia’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.
Outside zones 5–8
1 state
- North Dakota · zones 3b-4b
Winter cold is the limit here — the same plant often works in a container that comes under cover. Each link is that state’s own growing hub.
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 Stewartia
Growing guides for stewartia
In rotation planning, stewartia 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
Good news for pet owners — stewartia isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Stewartia offers moderate value to bees and other pollinators.
Your land is one point inside Stewartia'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 Stewartia will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether stewartia 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 Stewartia
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 Stewartia in my zone?
Stewartia grows in USDA hardiness zones 5 through 8 (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 Stewartia?
Set stewartia out in early spring or fall while it's dormant, so the roots establish before the heat of summer. Your local last-frost date — which a Growable Ground report pulls for your exact address — sets the precise window.
How much sun does Stewartia need?
Stewartia does well in partial sun — around 4 hours of direct sun, and it takes some afternoon shade in stride. That flexibility makes it a good match for a bed the house or a nearby tree shades for part of the day. A Growable Ground report maps how the sun actually falls on your land, hour by hour, so you can set it where the light lines up.
What soil does Stewartia need?
Stewartia prefers soil pH 5 to 7, on well-drained ground (Growable Ground Plant Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.
Does Stewartia attract pollinators?
Yes — stewartia's flowers are a solid nectar source for honeybees and native bees.
Is Stewartia safe for pets?
Stewartia is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)
Keep exploring Stewartia
Stewartia state by state
Every state stewartia's zone reaches — 2 link straight to that state's stewartia growing page; the rest open the state's full growing guide.