Torenia is an annual grown for its blooms, which open from spring through fall. Notably, it shrugs off deer and grows just as well in a container as in the ground. Its flowers are a modest draw for honeybees and native bees.
Torenia — the short answer
Torenia: part sun, pH 5.5–7, about 65 days to maturity.
- Soil pH
- 5.5–7
- We haven't confirmed this against a published source yet.
- Sun
- Part Sun
- We haven't confirmed this against a published source yet.
- Days to Maturity
- 65 days
- We haven't confirmed this against a published source yet.
- Frost-kill temp (growing season)
- 32°F
- We haven't confirmed this against a published source yet.
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 Torenia on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether torenia actually takes — and those shift from one yard to the next. Enter your address and we'll score torenia against your land's real conditions.
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What Torenia is
Torenia grows as an annual and reaches around a foot at maturity. It blooms from spring through fall. It's also deer-resistant and well suited to containers.
Mature height, bloom period, deer resistance and container suitability: We haven't confirmed this against a published source yet.
How to grow Torenia
Torenia does best in part sun — at least 4 hours of direct sun a day — and soil from pH 5.5 to 7, on well-drained ground. It needs around 1,300 growing degree days to mature and a growing season of at least 80 frost-free days, which is why climate matters as much as soil.
USDA Zones
Grown as an annual — see the growing season
Soil pH
5.5 - 7
We haven't confirmed this against a published source yet.
Sun
Part Sun
We haven't confirmed this against a published source yet.
Drainage
well (dry spells)
We haven't confirmed this against a published source yet.
Frost Kill Temperature
32°F
Where cold starts killing growing tissue. Not a winter-survival floor — a dormant perennial takes far colder, which its hardiness zone answers.
We haven't confirmed this against a published source yet.
Days to Maturity
65 days
We haven't confirmed this against a published source yet.
GDD Required
1300+
Growing degree-days of accumulated warmth it needs to mature — humid summers reach this faster than cool coastal ones.
We haven't confirmed this against a published source yet.
Mature Height
1 ft
We haven't confirmed this against a published source yet.
Frost-Free Days
80+
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 torenia in part sun with at least 4 hours of direct sun, once the soil has warmed and frost risk has passed. We haven't confirmed this against a published source yet.
Match the soil
Torenia prefers pH 5.5 to 7. We haven't confirmed this against a published source yet. 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. We haven't confirmed this against a published source yet. A 2–3 inch mulch layer holds moisture without waterlogging.
Harvest at its peak
Cut torenia blooms in the cool of the morning, just as they open, for the longest display.
Where Torenia thrives
Whether torenia thrives on a given site comes down to its soil pH, drainage, sun, and frost dates — the conditions that vary parcel to parcel.
What grows around Torenia
Growing guides for torenia
Related plants in annual flower
Good to know
Torenia offers low value to bees and other pollinators. We haven't confirmed this against a published source yet.
Your land is one point inside Torenia'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 Torenia will thrive on your land
Zone averages are a start. Your soil pH, drainage, sun exposure, and frost dates shape whether torenia actually takes. We score it against the mapped and modelled 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 Torenia
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
Frequently asked questions
Can I grow Torenia in my zone?
Torenia 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.
When should you plant Torenia?
Most growers plant torenia after the last spring frost, once the soil has warmed, leaving enough of the season for its 80-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 Torenia need?
Torenia does well in partial sun — around 4 hours of direct sun, and it takes some afternoon shade in stride. We haven't confirmed this against a published source yet. 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 Torenia need?
Torenia prefers soil pH 5.5 to 7, on well-drained ground. We haven't confirmed this against a published source yet. Your report scores your parcel's mapped soil against that using USDA SSURGO data.
Does Torenia attract pollinators?
Yes — torenia's flowers are a modest nectar source for honeybees and native bees. We haven't confirmed this against a published source yet.