Ambrosia hispida

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Coastal Ragweed, Bay Geranium

Asteraceae (Compositae)

Plant Specifics

Size:1 ft tall by spreading ft wide
Life Span:Short-lived perennial
Flower Color:Yellow (inconspicuous)
Fruit Color:NA
Noted for:Aroma, fragrance, Interesting foliage


Recommended Uses:Groundcover for sunny, dry sites. Spreads by rooting at the nodes.
Considerations:Will do poorly if over watered. Many people are allergic to its wind-borne pollen.
Propagation:Cuttings from established plants.
Availability:Native nurseries
Light: Full Sun
Moisture Tolerance:
always floodedextremely dry
 (Not wet but not extremely dry ----- to ----- Very long very dry periods)
Moisture Tolerance: Not wet but not extremely dry ----- to ----- Very long very dry periods
Salt Water Flooding Tolerance:Tolerant of inundation with brackish water
Salt Spray/ Salty Soil Tolerance:Some tolerance to salty wind but not direct salt spray.
Soil or other substrate:Lime rock, Sand
Soil pH:Circum-neutral to calcareous.



Wind pollinated plant so does not attract pollinators.

Native Habitats:Coastal uplands

Distribution and Planting Zones

Natural Range in Florida
USDA Zones

Suitable to grow in:
10A 8B 9A 9B 

USDA zones are based on minimum winter temperatures


General Comments:Leaves are aromatic.