Telmatoblechnum serrulatum

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Swamp Fern


Also known as Blechnum serrulatum

Plant Specifics

Size:2 - 3 ft tall by 1 - 2 ft wide
Life Span:Long-lived perennial
Flower Color:NA
Fruit Color:NA
Phenology:Winter dormant
Noted for:Interesting foliage


Recommended Uses:Ground cover for moist, shady sites. Also useful in wetland restoration.
Considerations:Will spread unless contained by physical or environmental limits. Periodic removal of old fronds is recommended.
Propagation:Division. Spores.
Availability:Native nurseries, FNPS plant sales, Specialty providers
Light: Part Shade,  Shade
Moisture Tolerance:
always floodedextremely dry
 (Stays Wet ----- to ----- Somewhat moist, no flooding)
Moisture Tolerance: Stays Wet ----- to ----- Somewhat moist, no flooding
Salt Water Flooding Tolerance:Not salt tolerant of inundation by salty or brackish water.
Salt Spray/ Salty Soil Tolerance:Low/no tolerance of salty wind or direct salt spray
Soil or other substrate:Clay, Loam, Organic material (muck), Sand
Soil pH:Acidic to neutral


Native Habitats:Marshes, swamps

Distribution and Planting Zones

Natural Range in Florida
USDA Zones

Suitable to grow in:
10A 10B 8B 9A 9B 

USDA zones are based on minimum winter temperatures


General Comments:This is one of the most common ferns in central-southern Florida and potentially one of the most beautiful.