Port (adulte) - Andrew Butko / Wikimedia Commons - CC BY-SA 3.0
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Géranium zonal
Pelargonium x hortorum
Le classique « géranium » de massif — un hybride tendre d'origine sud-africaine de Pelargonium cultivé pour ses ombelles arrondies de fleurs rouges, roses, orangées, violettes ou blanches qui fleurissent généreusement toute la saison. Ses feuilles arrondies en forme de rein portent souvent une bande circulaire foncée, la « zone » qui donne son nom à la plante. Rustique uniquement dans les zones USDA 10-11, il est cultivé comme annuelle ou hiverne en intérieur dans la majeure partie de l'Amérique du Nord.
Climate fit: narrow (23/100)
Container
Border
Focal point
Light
Full sun / Part shade
Water
Moderate water
Mature size
12-36" tall · 12" apart
Hardy in zones
10a-11b
mild to nearly frost-free winters
AHS heat range
6-12
Plant range authored in AHS heat-zone terms.
Native in Illinois
No
Une plante ornementale de massif et de conteneur cultivée pour ses fleurs et son feuillage aromatique, et non une culture alimentaire.
Cold hardiness
Future
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
USDA
Published baseline for this location from 1991-2020.
Source: USDA Plant Hardiness Zone Map 2023 (1991-2020 climatology) via ArcGIS FeatureServer
Won't grow here
2050
Zone 7a
Plotwright
Projected zone for this same location in 2050 (2041-2070) using SSP3-7.0 (regional rivalry).
Won't grow here
In plain terms: This location is in Zone 6b today. Its hardiness profile is cold winters, and coldest nights are typically around -3°F. By 2050, the projected hardiness zone is Zone 7a based on SSP3-7.0 (regional rivalry). That is a +0.5-zone shift from Zone 6b to Zone 7a by 2050.
✕
Out of range today and still out of range in 2050.
Heat tolerance
Future
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...
Where this plant fits
Suitable across 17 ecoregions — 11 climate-resilient through 2070 · 6 newly possible by 2070. Best matches first.
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). Géranium zonal (Pelargonium x hortorum). Retrieved 2026, June 14, from https://plotwright.garden/plants/pelargonium-x-hortorum
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
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Lifecycle
Regional guidance
Success tips
Designer notes