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
- Growable Ground Plant Database
- Sun
- Part Sun
- Growable Ground Plant Database
- Days to Maturity
- 65 days
- Growable Ground Plant Database
- Frost-kill temp (growing season)
- 32°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.
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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.
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
Data pending
Soil pH
5.5 - 7
Growable Ground Plant Database
Sun
Part Sun
Growable Ground plant catalog
Drainage
well (dry spells)
Growable Ground plant catalog
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.
Growable Ground Plant Database
Days to Maturity
65 days
Growable Ground plant catalog
GDD Required
1300+
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
1 ft
Growable Ground plant catalog
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.
Match the soil
Torenia prefers pH 5.5 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.
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
In rotation planning, torenia 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)
Related plants in annual flower
Good to know
Good news for pet owners — torenia isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Torenia offers low value to bees and other pollinators.
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 exact soil pH, drainage, sun exposure, and frost dates shape whether torenia 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 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•USDA PHZM•ASPCA
Frequently asked questions
Can I grow Torenia in my zone?
Zone data for torenia is being finalized. A Growable Ground report checks your parcel's full suitability against federal soil, climate, and zone data.
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. 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 (Growable Ground Plant Database). Your report scores your parcel's actual 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.
Is Torenia safe for pets?
Torenia is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)