Native Plants

Florida Amaranth

Amaranthus floridanus

USDA symbol: AMFL3

annual forb

Lower 48 states: native

Meet Florida amaranth (Amaranthus floridanus), one of the Sunshine State’s most elusive native plants. This little-known annual herb might not win any beauty contests, but it’s got something far more valuable – it’s a rare piece of Florida’s natural heritage that’s clinging to existence in the state’s remaining wetlands. Florida ...

Florida Amaranth may be listed as rare in your area.
Global Conservation Status

Status: S3 | Vulnerable: Found only in a restricted range (even if abundant at some locations). Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals.

Florida Amaranth: A Rare Wetland Treasure Worth Protecting

Meet Florida amaranth (Amaranthus floridanus), one of the Sunshine State’s most elusive native plants. This little-known annual herb might not win any beauty contests, but it’s got something far more valuable – it’s a rare piece of Florida’s natural heritage that’s clinging to existence in the state’s remaining wetlands.

What Makes Florida Amaranth Special?

Florida amaranth isn’t your typical garden plant. This unassuming annual forb – that’s botanist-speak for a soft-stemmed, non-woody plant – has earned a vulnerable conservation status (S3) because it’s become increasingly rare throughout its limited range. With only 21 to 100 known occurrences and an estimated 3,000 to 10,000 individual plants remaining, this little green survivor is fighting an uphill battle against habitat loss.

The plant is also known by its scientific synonym Acnida floridana, though you’re more likely to encounter it in wetland restoration discussions than in your local nursery catalog.

Where Does Florida Amaranth Call Home?

As its name suggests, Florida amaranth is exclusively found in Florida, making it a true endemic species. This wetland specialist has put all its evolutionary eggs in one basket – Florida’s unique wetland ecosystems. It’s classified as an obligate wetland plant, which means it almost always occurs in wetlands and depends on these soggy conditions to survive.

  • Species observed
  • No observations

Should You Plant Florida Amaranth in Your Garden?

Here’s where things get a bit complicated. While Florida amaranth is undeniably a native plant worth celebrating, it’s not exactly what you’d call garden-friendly. This specialized wetland plant requires very specific growing conditions that most home gardens simply can’t provide.

The reality check: Florida amaranth needs consistently saturated soils and wetland conditions to thrive. Unless you have a natural bog, constructed wetland, or are involved in professional wetland restoration, this plant probably isn’t going to be happy in your landscape.

Growing Conditions and Requirements

If you’re determined to work with this rare beauty, here’s what Florida amaranth demands:

  • Moisture: Consistently wet to saturated soils – think bog conditions
  • Habitat: Wetland environments only
  • Climate: Warm, humid conditions typical of Florida
  • Soil: Hydric (wetland) soils with poor drainage
  • Sun exposure: Likely full to partial sun in wetland settings

The Conservation Angle

Because Florida amaranth is classified as vulnerable, any cultivation attempts should only use responsibly sourced, ethically collected seeds or plants. Never collect from wild populations – these plants need every individual they can get to maintain genetic diversity and population stability.

If you’re interested in supporting Florida amaranth conservation, consider:

  • Supporting wetland conservation organizations
  • Participating in native plant society restoration projects
  • Advocating for wetland protection in your community

Alternative Native Plants for Your Garden

If you’re drawn to Florida amaranth because you want to support native Florida plants, consider these more garden-friendly alternatives:

  • Native Florida wildflowers like blanket flower or black-eyed Susan
  • Florida-friendly shrubs such as firebush or beautyberry
  • Other native amaranth species that are more adaptable to garden conditions

The Bottom Line

Florida amaranth is a fascinating piece of Florida’s botanical puzzle, but it’s not destined for your typical backyard garden. This rare wetland specialist serves as a reminder of how unique and fragile our native ecosystems can be. While you probably shouldn’t try to grow it at home, you can still appreciate its role in Florida’s wetland communities and support conservation efforts that help protect the habitats where this uncommon plant makes its last stand.

Sometimes the best way to love a native plant is to admire it from afar and work to protect the wild places where it belongs.

Amaranthus floridanus is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Amaranthus floridanus is also known as:

Acnida floridana | USDA symbol: ACFL2

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Dicot
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Superdivision: Spermatophyta - Seed plants
Division: Magnoliophyta - Flowering plants
Class: Magnoliopsida - Dicotyledons
Subclass: Caryophyllidae
Order: Caryophyllales
Family: Amaranthaceae Martinov - Amaranth family
Genus: Amaranthus L. - pigweed

Species: Amaranthus floridanus (S. Watson) Sauer - Florida amaranth

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA