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Impatiente de Waller
Impatiens walleriana
La « busy lizzy » — selon Missouri Botanical Garden « la plante annuelle de massif la plus populaire aux États-Unis aujourd'hui », prisée pour sa floraison ininterrompue à l'ombre là où la plupart des annuelles peinent. Vivace à tiges succulentes, tendre, originaire d'Afrique de l'Est (Tanzanie, Mozambique), elle est cultivée comme annuelle partout sauf dans les zones USDA 10-11, formant des monticules de 6 à 24 inch et se couvrant de fleurs décoratives à éperon fin et cinq pétales, roses, roses vifs, rouges, lilas, mauves, oranges, blanches et bicolores de juin jusqu'aux gelées. À savoir avant de planter tout un massif : l'espèce est sensible au mildiou des impatiences (Plasmopara obducens), qui peut détruire une plantation.
Climate fit: narrow (23/100)
Filler
Border
Container
Light
Part shade
Water
Consistent moisture
Mature size
6-24" tall · 12" apart
Lifecycle
True annual (one season)
AHS heat range
4-11
Plant range authored in AHS heat-zone terms.
Native in Illinois
No
Cultivée uniquement comme annuelle ornementale de massif ombragé, de bac et de panier suspendu (et plante d'intérieur) ; ne constitue pas une plante 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). Impatiente de Waller (Impatiens walleriana). Retrieved 2026, June 14, from https://plotwright.garden/plants/impatiens-walleriana
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