FNPS Plant Database

Ageratum maritimum

cape sable whiteweed, seaside ageratum, Keys ageratum

Nomenclature

Common Name:

cape sable whiteweed, seaside ageratum, Keys ageratum

Synonym(s):

Ageratum littorale

Genus species:

Ageratum maritimum

Family:

Asteraceae (Compositae)

Plant Specifics

Form:

Herb

Size:

1 ft tall, sprawling

Life Span:

short-lived perennial

Flower Color:

blue

Fruit Color:

Phenology:

Evergreen. Blooms year-round.

Noted For:

Showy Flowers

Landscaping

Recommended Uses:

Coastal wildflower gardens.

Considerations:

State Endangered. Obtain from reputable sources only.

Availability:

Native Nurseries, Friends, Specialty Provider, Seed

Propagation:

Seed.

Light:

Full Sun

Moisture Tolerance:

Always Flooded---------------------------------Extremely Dry

□□□□□□□□□□□□□□□□□□■■■■■■■■■■■■■■■□□□□□□□□□

Somewhat moist, no flooding -to- Short very dry periods

Salt Water Flooding

Tolerance:

Unknown

Salt Spray/Salty Soil Tolerance:

Moderate. Tolerant of salty wind and may get some salt spray

Soil or Other Substrate:

Sand, Lime Rock

Soil pH:

Calcareous

Suitable to Grow In:

10A,10B,11

USDA zones are based on the average annual extreme minimum winter temperature.

Don't know your zone? Click here to search by zip code.

Vouchered In:

Distribution
Vouchered
Not vouchered
Selected
Click a county The county name will appear here.
No county distribution is available for this plant yet.
Starting…
Map coded by Melissa Fernandez-de Cespedes (Paynes Prairie Chapter)

Ecology

Wildlife:

Pollinators, Butterflies

Nectar source for butterflies, bees.

Native Habitats:

Coastal berms, rock barrens, and rockland hammocks

Natural Range in Florida:

Comments:

Ethnobotany:

General Comments:

FNPS Plant Print

Citations:

Chafin, L. G. (2000). Field Guide to the Rare Plants of Florida. Florida Natural Areas Inventory, Tallahassee, FL.


Gann, G.D., C.J. Abbott, C.G. Stocking, K.N. Hines, and collaborators. (2001+). Plant Name [in] Natives For Your Neighborhood. ( https://www.regionalconservation.org/beta/nfyn/plantdetail.asp?tx=Agermari ). Accessed 2026. The Institute for Regional Conservation. Delray Beach, FL.


Hammer, Roger. (2004). Florida Keys Wildflowers: A Field Guide to the Wildflowers, Trees, Shrubs and Woody Vines of the Florida Keys. Falcon Press Publishing, Guilford, CT.


Wunderlin, R. P., B. F. Hansen, A. R. Franck, and F. B. Essig. (1999+). Atlas of Florida Plants. ( https://florida.plantatlas.usf.edu/ ). [S. M. Landry and K. N. Campbell (application development), USF Water Institute.] Institute for Systematic Botany, University of South Florida, Tampa, FL.

Request an Update