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// SPECIES PROFILE · ANNUAL · NATIVE

Robert geranium

Geranium robertianum

Robert geranium (Geranium robertianum) is a annual in the — family. Native range includes MO — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 3a–11a. Mature size 6"–2'. Blooms May–Oct.

// QUICK FACTS
Family
—
Group
annual
Native range
Native to 22 U.S. states, including CA, CT, IL, IN, MA, MD…
USDA hardiness
Zones 3a–11a
Mature size
6"–2'
Sun
—
Water
—
Bloom
May–Oct
Wildlife value
Pollinator and wildlife support
Ecological role
native species profile
Robert geranium (Geranium robertianum)
Geranium robertianum — Robert geranium. Photo by Original uploader was Sannse at en.wikipedia via Wikimedia Commons (CC BY-SA 3.0).

Field Notes

[ growing · ecology · siting · care ]

Robert geranium (Geranium robertianum) is a annual in the — family. Native range includes MO — verified against the Lady Bird Johnson Wildflower Center native distribution database. Hardy in zones 3a–11a. Mature size 6"–2'. Blooms May–Oct.

Why it's on this list: native species profile. Native-range data from the Lady Bird Johnson Wildflower Center (NPIN), cross-checked against iNaturalist observations. Part of Rooted Revival's regional native plant catalog — true natives for Oklahoma, Arkansas, Missouri and Kansas.

Companion Planting

[ guild · polyculture · cross-layer pairings ]

In the same native range, robert geranium pairs naturally with: Black-Eyed Susan (Rudbeckia hirta), Common Sunflower (Helianthus annuus), Swamp verbena (Verbena hastata), Slim amaranth (Amaranthus hybridus).

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