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Roselle

Roselle

Hibiscus sabdariffa
An upright, frost-tender warm-season annual mallow domesticated in West Africa and now grown throughout the tropics for its edible calyces (GBIF). It carries red stems, lobed leaves, and pale-yellow hibiscus flowers, but the prize is the fleshy, deep-red CALYCES that swell around the seed pod after each flower fades - the source of the famous ruby "hibiscus" / roselle / bissap tea, syrups, and jam. The young leaves are also eaten as a sour potherb. It needs a long hot season and full sun to flower and set its calyces, and because it is short-day it flowers only as the nights lengthen in autumn, so in cool-summer climates it may run out of season before the harvest matures.
Climate fit: narrow (23/100)
Edible
Focal point
Structure
Light
Full sun
Water
Moderate water
Mature size
4-7 ft tall · 24" apart
Hardy in zones
9b-11
frosty to nearly frost-free winters
AHS heat range
8-12
Plant range authored in AHS heat-zone terms.
Native status
Cultivated - no wild native range
The edible parts are the fleshy, deep-red CALYCES and the young leaves - not the dry seed pod itself.

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...

Where this plant fits

Suitable across 2 ecoregions - 2 climate-resilient through 2070. Best matches first.

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.

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Educator packet

Plant packet
Roselle educator packet
An upright, frost-tender warm-season annual mallow domesticated in West Africa and now grown throughout the tropics for its edible calyces (GBIF). It carries red stems, lobed leaves, and pale-yellow hibiscus flowers, but the prize is the fleshy, deep-red CALYCES that swell around the seed pod after each flower fades - the source of the famous ruby "hibiscus" / roselle / bissap tea, syrups, and jam. The young leaves are also eaten as a sour potherb. It needs a long hot season and full sun to flower and set its calyces, and because it is short-day it flowers only as the nights lengthen in autumn, so in cool-summer climates it may run out of season before the harvest matures.
Scientific name
Hibiscus sabdariffa
Plant type
shrub
Hardiness
9b-11
Light
full-sun
Moisture
moderate
Spacing
24 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). Roselle (Hibiscus sabdariffa). Retrieved 2026, August 20, from https://plotwright.com/plants/hibiscus-sabdariffa
Sources used for this record
This record is compiled from the sources below.
RHS Find a Plant
Botanical research database
GBIF
Botanical research database
Wikipedia (ecoregion articles)
Botanical research database
Wikimedia Commons
Photo