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Nasturtium

Nasturtium

Tropaeolum majus
The classic garden nasturtium — a fast, easy annual grown for showy, long-spurred, funnel-shaped flowers in red, orange, yellow, and cream above round, shield-shaped (peltate) leaves with radiating veins. Dwarf-bushy types sprawl through beds and containers while climbing types scramble up a trellis. Every part except the roots — leaves, buds, flowers, pods, and seeds — is edible with a peppery, watercress-like bite, and the flowers draw hummingbirds and butterflies.
Climate fit: moderate (68/100)
Edible
Pollinator
Container
Light
Full sun
Water
Moderate water
Mature size
12-120" tall · 12" apart
Lifecycle
True annual (one season)
AHS heat range
1-9
Plant range authored in AHS heat-zone terms.
Native in Illinois
No

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The long-spurred, funnel-shaped flowers hold nectar at the tip of the spur and attract hummingbirds and butterflies as well as long-tongued bees (Missouri Botanical Garden PlantFinder lists the flowers as attracting hummingbirds and butterflies).

Cold hardiness

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.
Now
Zone 6b
Plotwright
USDA Zone 6b
-5°F to 0°F
Well-suited
Zone 7a
Plotwright
0°F to 5°F
Well-suited
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
Well-suited today and still thriving in 2050.

Heat tolerance

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.
Loading AHS heat-zone data for this location...

Similar plants

Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
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Sources & citations

Cite this page
For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.
Plotwright. (2026, May 17). Nasturtium (Tropaeolum majus). Retrieved 2026, June 24, from https://plotwright.com/plants/tropaeolum-majus
Sources for every fact
Every fact on this page traces to a source. 18 fields cited - 18 source-backed.
Missouri Botanical Garden PlantFinder
Botanical research database
Backs 17 fields
Identity
Summary
Plant type
Light
Moisture
Hardiness
Heat zone
Size
Spacing
Habit
Design roles
Seasonal interest
Growth stages
Lifecycle
Regional guidance
Success tips
Designer notes
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