Tamarisk can be classified into three species: Tamarix aphylla, T. parviflora, and T. ramosissima. On some continents, it is reported as an invasive species since it crowds native vegetation out.
Here are a few maps that show the distribution of Tamarix across the planet. Also included is how to report sightings of this invasive plant.
Invasive Tamarisk & native range
Native to – Asia, Mediterranean and North Africa (depending on the species)
Invasive in – Australia, United States, South Africa, Canada, Mexico, Argentina
What is the native range of tamarisk?
Tamarisk is native to Central Asia and Eastern Europe. Here is a map that shows where it grows naturally in the wild. The green area marks the native growing area of each tamarisk species.
On other continents, Tamarix is extremely invasive. It produces tens of thousands of seeds per plant every year, and they germinate fast. Within two or three decades, it can transform the local environment and wipe other plants out.
Common salt cedar, Tamarix ramosissima
Native range: Afghanistan, Armenia, Azerbaijan, China, Iran, Iraq, Kazakhstan, Korea, Kyrgyzstan, Moldova, Mongolia, Pakistan, Russia, Tajikistan, Turkey, Turkmenistan, Ukraine, Uzbekistan
Smallflower tamarisk, Tamarix parviflora
Native range: Albania, Croatia, Greece, Israel, Macedonia, Slovenia, Turkey
Desert Tamarisk, Tamarix aphylla
Native range: Afghanistan, Algeria, Egypt, Eritrea, Ethiopia, India, Iran, Kenya, Libya, Mauritania, Morocco, Pakistan, Saudi Arabia, Senegal, Somalia, Sudan, Tunisia, Yemen
Where has tamarisk spread so far?
In the United States
This map shows reports of tamarisk throughout the United States. Every county where the plant has been reported is marked in green. It’s updated thanks to the Early Detection and Distribution Mapping System (University of Georgia).
- If you notice any in your area, you can report it to them here.
In Canada
In British Columbia, there are already reports of tamarisk.
If you notice one as you walk around, report it to Canadian wildlife agencies here.
Canada also set up a program together with horticulture stores and landscapers. It’s called “Plantwise“. Together, they wrote up a list of excellent shrubs that you can replace tamarisk with:
- Smoke bush (Cotinus coggygria)
- Preston Lilac (Syringa x prestoniae)
- Birchleaf spirea (Spiraea betulifolia subsp. lucida)
- Pacific ninebark (Physocarpus capitatus)
- Rocky mountain juniper (Juniperus scopulorum)
Which US states regulate Tamarisk?
Currently, only a few states have laws that prohibit or restrict planting and sale of this tree. Others are currently studying the risk that this plant poses. This translates into having the plant on a “watch list” of possible invasive species.
- Even if Tamarix isn’t yet illegal in your state, you might want to join in on local efforts to control it.
- Some states are still considering making laws. You can try and change things yourself by getting involved! Contact your local governor’s office or representative.
Here is a map, also updated daily, that shows the current legal status of Tamarisk or saltcedar in the United States.
Smart tip about reporting tamarisk presence
With smartphones, it becomes increasingly easy to report this invasive plant when you sight it. The EDDMapS phone app gathers GPS location data and forwards it to the agency that can best help control the weed.
Tamarisk flower by Christiane Klahr under Pixabay license
World Map base by Smurfy under © CC BY-SA 3.0
Canada map base by Canadensys Université de Montréal Biodiversity Centre under Public Domain
this is hilarious. your article ends with advice on how to stop this plant from spreading, including suggesting that one advocate for legislation to ban the plant in your area (despite very few states being interested in this), and the article is immediately followed by a link to another article touting this “very easy shrub” as “ideal for seaside gardens”. 😅
Hello J. Barclay, I’m glad I wrought a laugh out of you! You’ve pointed out that it seems absurd that an article on invasive plants should also mention links to pages teaching how to grow that plant.
But this makes sense when you consider that readers come from the entire planet. Some of them come from English-speaking countries where tamarisk is native and non-invasive, like India. People there are legitimately interested in learning how to grow the shrub for their own gardens.
I did my best to write words of caution in the article on growing tamarisk, so that people in countries where it’s invasive are made aware of this. There are four mentions of invasiveness on that page, two of them links sending back to this page itself, where readers can easily identify if they’re in a native zone or not.
In the end, I do thank you for having taken the time to comment as you did. I’d appreciate your help, if you so wish, in trying to mark out other plants as invasive, I know there are certainly many I haven’t covered yet in that respect. Perhaps you also noticed other plants I should work on for this?