Ageratum maritimum

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Seaside Ageratum, Cape Sable Whiteweed


Also known as Ageratum littorale

Plant Specifics

Size:Typically 1 to 2 ft tall.
Life Span:Annual to short-lived perennial
Flower Color:Blue, lavender
Phenology:Blooms year-round in south Florida.
Noted for:Showy flowers


Recommended Uses:Wildflower garden.
Propagation:Seed or dividion of clumps.
Availability:Friends, Native nurseries
Light: Full Sun,  Part Shade
Moisture Tolerance:
always floodedextremely dry
 (Somewhat moist, no flooding ----- to ----- Very long very dry periods)
Moisture Tolerance: Somewhat moist, no flooding ----- to ----- Very long very dry periods
Salt Water Flooding Tolerance:Tolerant of occasional/brief inundation such as can occur in storm surges.
Salt Spray/ Salty Soil Tolerance:Moderate. Tolerant of salty wind and may get some salt spray. Exposure to salt spray would be uncommon (major storms).
Soil or other substrate:Lime rock, Sand
Soil pH:Slightly acidic to somewhat calcareus



Attracts butterflies and bees.

Native Habitats:Coastal hammocks and thickets. Roadsides and other disturbed areas.

Distribution and Planting Zones

Natural Range in Florida
USDA Zones

Suitable to grow in:
10A 10B 11 

USDA zones are based on minimum winter temperatures


General Comments:Listed as Endangered in Florida.