Non-native Plants

Palmer’s Zinnia

Zinnia maritima var. palmeri

USDA symbol: ZIMAP

annual forb

Hawaii: non-native, naturalized

If you’ve stumbled across the name Palmer’s zinnia (Zinnia maritima var. palmeri), you’re looking at one of the more mysterious members of the beloved zinnia family. This annual forb has quite the story – it’s managed to make itself at home in Hawaii despite not being native to the islands, ...

Palmer’s Zinnia: A Lesser-Known Annual with Maritime Connections

If you’ve stumbled across the name Palmer’s zinnia (Zinnia maritima var. palmeri), you’re looking at one of the more mysterious members of the beloved zinnia family. This annual forb has quite the story – it’s managed to make itself at home in Hawaii despite not being native to the islands, which tells us something about its adaptable nature.

What Exactly is Palmer’s Zinnia?

Palmer’s zinnia is an annual flowering plant that belongs to the forb category – essentially, it’s a non-woody plant that completes its entire life cycle in one growing season. You might also see it listed under its synonym, Zinnia palmeri A. Gray, in older botanical references. Unlike its woody cousins, this plant puts all its energy into flowers and seeds rather than building permanent structure.

Where Does Palmer’s Zinnia Come From?

Here’s where things get interesting. While Palmer’s zinnia has established itself in Hawaii, where it now reproduces on its own in the wild, it’s not actually native to the islands. This hardy little plant has proven quite the colonizer, managing to naturalize and persist without any human assistance.

  • Species observed
  • No observations

Should You Grow Palmer’s Zinnia?

This is where we hit a bit of a roadblock. Palmer’s zinnia falls into that tricky category of plants that are well-documented botanically but somewhat mysterious horticulturally. While we know it exists and can survive on its own in Hawaiian conditions, specific information about its garden performance, growing requirements, and ornamental value is surprisingly scarce.

What we can tell you:

  • It’s an annual, so you’ll need to replant each year or rely on self-seeding
  • As a forb, it’s likely to be relatively low-growing and herbaceous
  • Its ability to naturalize in Hawaii suggests it’s fairly adaptable to warm, potentially coastal conditions
  • Being part of the zinnia family, it may share some characteristics with its more common relatives

Growing Considerations and Alternatives

Given the limited growing information available for Palmer’s zinnia specifically, you might want to consider some alternatives if you’re looking for reliable garden performers. If you’re drawn to the zinnia family, common zinnias (Zinnia elegans) are much better documented and easier to grow successfully.

For those interested in supporting native ecosystems, especially if you’re gardening in Hawaii, consider exploring native Hawaiian flowering plants that provide proven benefits to local wildlife and pollinators. Native plants are always the gold standard for supporting local ecosystems.

The Bottom Line

Palmer’s zinnia represents one of those fascinating botanical mysteries – a plant that’s scientifically documented but horticulturally elusive. While it’s clearly capable of thriving in certain conditions (hello, Hawaii!), the lack of specific growing information makes it more of a botanical curiosity than a garden staple.

If you do encounter Palmer’s zinnia or decide to experiment with it, approach it like you would any zinnia relative: provide good drainage, adequate sunlight, and see what happens. Just remember to be mindful of its non-native status and consider the impact on local ecosystems, especially if you’re gardening in areas where it might naturalize.

Zinnia maritima var. palmeri 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. Zinnia maritima var. palmeri is also known as:

Zinnia palmeri | USDA symbol: ZIPA4

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: Asteridae
Order: Asterales
Family: Asteraceae Bercht. & J. Presl - Aster family
Genus: Zinnia L. - zinnia

Species: Zinnia maritima Kunth - Palmer's zinnia

Variety: Zinnia maritima Kunth var. palmeri (A. Gray) B.L. Turner - Palmer's zinnia

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