Zonal geranium
Pelargonium x hortorum
The classic bedding "geranium" - a tender hybrid of South African Pelargonium parentage grown for rounded umbels of red, pink, orange, purple, or white flowers that bloom freely all season. Its rounded, kidney-shaped leaves often carry a dark circular band, the "zone" that gives the plant its name. Hardy only in USDA zones 10-11, it is grown as an annual or overwintered indoors across most of North America.
Climate fit: narrow (24/100)
Container
Border
Focal point
Light
Full sun / Part shade
Water
Moderate water
Mature size
1-3 ft 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 status
Cultivated - no wild native range
An ornamental bedding and container plant grown for its flowers and aromatic foliage, not a food crop.
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
Won't grow here
Zone 7a
Plotwright
0°F to 5°F
Won't grow here
In plain terms: This location has cold winters. Its winters are projected to keep warming through 2050.
✕
Out of range today and still out of range 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...
Plant this, not that
Better fit for this place
For Chicago, IL, these are replacement suggestions: similar plants with a stronger hardiness fit now and/or in 2050.
Better fit now and in 2050
Now: well-suited
2050: well-suited
Better fit now and in 2050
Now: well-suited
2050: well-suited
Better fit now and in 2050
Now: well-suited
2050: well-suited
Better fit now and in 2050
Now: well-suited
2050: well-suited
Similar plants
Browse lateral options with similar roles, light needs, size, or native-range overlap; these are not filtered for a better climate fit.
Educator packet
Plant packet
Zonal geranium educator packet
The classic bedding "geranium" - a tender hybrid of South African Pelargonium parentage grown for rounded umbels of red, pink, orange, purple, or white flowers that bloom freely all season. Its rounded, kidney-shaped leaves often carry a dark circular band, the "zone" that gives the plant its name. Hardy only in USDA zones 10-11, it is grown as an annual or overwintered indoors across most of North America.
Scientific name
Pelargonium x hortorum
Plant type
perennial
Hardiness
10a-11b
Light
full-sun, part-shade
Moisture
moderate
Spacing
12 inches
Classroom prompts
- Which plant traits are observations, and which are care recommendations?
- How would this plant fit change if the garden location moved warmer, colder, wetter, or drier?
- Which source-backed facts would you cite in a lesson handout?
Use the Sources & citations section below for page citation styles and the field-level source list.
Sources & citations
Cite this page
For lesson plans, articles, or research that uses this page. Use the source cards below to explore the references that informed this record.
Plotwright. (2026, May 17). Zonal geranium (Pelargonium x hortorum). Retrieved 2026, August 20, from https://plotwright.com/plants/pelargonium-x-hortorum
Sources used for this record
This record is compiled from the sources below.







