Nasturtium is grown for its blooms, which open from spring through fall. Notably, it shrugs off deer. Its flowers are a moderate draw for honeybees, native bees, butterflies, and hummingbirds.
Zones
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pH Range
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Sun
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Days to Maturity
55
Score Nasturtium on your exact land.
Zone averages can't see the slope, soil, frost, and sun that decide whether nasturtium actually takes — and those shift from one yard to the next. Enter your address and we'll score nasturtium against your land's real conditions.
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What Nasturtium is
Nasturtium reaches around a foot at maturity. It blooms from spring through fall. It's also deer-resistant.
How to grow Nasturtium
It needs around 650 growing degree days to mature, which is why climate matters as much as soil.
USDA Zones
Data pending
Soil pH
Data pending
USDA PLANTS Database
Sun
Data pending
Growable Ground plant catalog
Drainage
Data pending
Growable Ground plant catalog
Days to Maturity
55 days
Nasturtium; annual edible flower; full sun; cool-season.
UMD-Herb; Johnny's
GDD Required
650+
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
0+
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 nasturtium in full sun.
Match the soil
Pull a soil test from your local Extension lab to confirm pH and drainage match nasturtium's needs before planting.
Water steadily
Keep the root zone evenly moist through establishment. Match watering to the plant's drainage preference and your local rainfall.
Harvest at its peak
Cut nasturtium blooms in the cool of the morning, just as they open, for the longest display.
Good to know
Good news for pet owners — nasturtium isn't known to be toxic to dogs or cats. (Source: ASPCA.)
Nasturtium offers moderate value to bees and other pollinators. (Source: Pollinator Partnership.)
Where Nasturtium thrives
Whether nasturtium thrives on a given site comes down to its soil pH, drainage, sun, and frost dates — the conditions that vary parcel to parcel.
See if Nasturtium will thrive on your land
Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether nasturtium 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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Frequently Asked Questions
Can I grow Nasturtium in my zone?
Zone data for nasturtium is being finalized. A Growable Ground report checks your parcel's full suitability against federal soil, climate, and zone data.
When should you plant Nasturtium?
Time nasturtium to your own season rather than the calendar. Your local frost dates set the exact window — a Growable Ground report reads them for your address.
What soil does Nasturtium need?
Specific pH data for nasturtium is pending. A soil test from your local Extension lab confirms what your site needs.
Does Nasturtium attract pollinators?
Yes — nasturtium's flowers are a solid nectar source for honeybees, native bees, butterflies, and hummingbirds. (Source: Pollinator Partnership.)
Is Nasturtium safe for pets?
Nasturtium is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)