Beyond Traditional Mining: How Plants, Biology and Technology Could Transform Rare Earth Extraction

For more than a century, the basic model for extracting minerals has remained remarkably consistent.

Find a deposit. Move enormous amounts of earth. Crush the ore. Process it. Separate the valuable material. Manage what is left behind.

But the technologies that depend on critical minerals are changing rapidly—and now the way we obtain those minerals may be changing as well.

Rare earth elements such as neodymium, praseodymium and dysprosium are essential inputs for permanent magnets, electric motors, wind turbines, electronics, advanced manufacturing and defense technologies. At the same time, governments and manufacturers are looking for ways to diversify supply chains and recover valuable materials from resources that have historically been considered uneconomic.

That challenge is creating an entirely new category of innovation.

Instead of asking only:

Where can we build the next mine?

Entrepreneurs and researchers are increasingly asking:

Where else can we find these materials—and can biology, chemistry and technology help us recover them?

The answers could fundamentally change the critical-minerals industry.

What If We Could Grow Rare Earth Elements?

One of the most fascinating emerging technologies is phytomining.

The concept sounds almost counterintuitive: use plants to extract valuable minerals from the ground.

Certain plants known as hyperaccumulators can absorb unusually high concentrations of metals from soil. Those plants can be cultivated on mineral-rich land, harvested and processed so that the accumulated material can be recovered.

In other words, instead of digging up massive quantities of rock to reach a relatively small concentration of valuable minerals, phytomining allows the plant's biological systems to perform part of the concentration process.

The concept is moving beyond theory.

Rare Flora is developing phytomining approaches for rare earth elements using specialized plants grown on metal-rich soils. The company describes a process in which hyperaccumulator plants absorb rare earth elements, after which the above-ground biomass is harvested and converted into a concentrated "bio-ore."

Recent research involving Rare Flora and University of Idaho researchers provides an indication of the technology's potential. Researchers evaluated native plants in naturally occurring rare-earth-rich Idaho soil and identified Pseudoroegneria spicata and Phalaris arundinacea as promising hyperaccumulators. The study concluded that phytomining using these grasses warrants further development.

That represents a very different vision of resource production.

A future rare-earth operation might not always look like a conventional mine.

In some circumstances, it could look more like a farm.

The Science Is Advancing Quickly

Rare Flora isn't the only example.

Research published in 2026 examined the broader potential for using "REE crops" to recover rare earth elements from soils. One particularly effective hyperaccumulator, Dicranopteris linearis, has been reported to accumulate rare earth elements at concentrations reaching 0.7% of leaf dry weight under some conditions. Researchers are exploring ways not only to recover the elements from these plants but also to turn rare-earth-enriched biomass into useful materials.

Another recent breakthrough addresses one of phytomining's major challenges: getting the minerals back out of the harvested plant efficiently.

Researchers reported a rapid electrothermal calcination process capable of achieving rare-earth extraction efficiencies of up to roughly 97% from enriched plant biomass while reducing carbon emissions by more than 70% compared with conventional furnace-based processing in their life-cycle comparison.

Scientists have even discovered naturally formed nanoscale monazite—a rare-earth-containing mineral—inside the tissues of a hyperaccumulator fern. That discovery raises intriguing possibilities around plants not simply absorbing rare earth elements, but participating in the formation of mineral structures that could eventually make recovery easier.

These technologies remain at different stages of development, and phytomining still faces significant questions around yield, processing economics, land requirements and scalability.

But the direction is important.

Biology is becoming part of the mining technology stack.

The Bigger Opportunity: Mining Resources We Already Have

Phytomining is part of an even larger transformation.

The next generation of critical-mineral production may increasingly focus on recovering materials from resources that already exist above ground—or in waste streams.

That includes:

• Mine tailings

• Coal and coal byproducts

• Acid mine drainage

• Oil and gas wastewater

• Electronic waste

• Manufacturing scrap

• Low-grade mineral deposits

• Previously disturbed or contaminated land

  
  

These materials have historically been treated as waste, liabilities or resources that were simply too difficult or expensive to process.

Technology is beginning to change that equation.

The U.S. Department of Energy announced $134 million in 2026 for projects intended to demonstrate recovery and refining of rare earth elements from unconventional feedstocks including mine tailings, electronic waste and other waste materials.

DOE has also backed work involving critical-mineral recovery from industrial feedstocks and coal-based materials.

The implication is significant.

The world's next mineral resource may not necessarily be a newly discovered deposit. It could be something we have been walking past, farming over, pumping away or storing as waste for decades.

Biomining: Let Microorganisms Do Some of the Work

Plants aren't the only biological tool being explored.

Bioleaching uses microorganisms or biologically produced compounds to help release metals from solid materials.

Researchers are exploring microbial processes for critical-mineral recovery from ores, waste streams and recycled materials. DOE-supported work, for example, includes a pilot-scale biohydrometallurgical system designed to recover critical minerals from electronic waste and manufacturing scrap using biological leaching.

Other federally supported research is combining engineered microorganisms, phytomining and novel separation technologies into next-generation rare-earth extraction systems.

Taken together, these technologies suggest that the boundary between mining, agriculture, biotechnology and advanced materials processing is beginning to blur.

AI Is Changing Where We Look

Innovation is also happening before extraction begins.

Artificial intelligence, advanced geospatial modeling, spectroscopy and increasingly sophisticated geological datasets can help identify resources that traditional exploration methods may overlook.

DOE has already supported AI-based approaches designed to accelerate the identification of domestic critical-mineral resources.

Combine better resource discovery with phytomining, biomining, advanced separation and waste recovery, and an interesting possibility emerges:

We may be entering an era in which economically valuable mineral resources can be identified and recovered from places that would never have justified a conventional mining operation.

From "Mine or Don't Mine" to a Portfolio of Resource Strategies

None of this means traditional mining disappears.

The scale of global demand for critical minerals makes conventional mining an important part of the supply picture.

But the future may not be a choice between conventional mining and one replacement technology.

It could be an ecosystem.

Traditional mining for high-quality deposits.

Phytomining for certain lower-grade soils and previously disturbed land.

Bioleaching for appropriate ores and waste materials.

Recovery from mine tailings and industrial byproducts.

Recycling from electronics and permanent magnets.

Advanced separation technologies that make all of those feedstocks more economical.

The strategic shift is from thinking exclusively about mines to thinking about resources.

The Commercialization Challenge

This is also where many emerging technology companies will face their biggest obstacle.

Proving that a plant absorbs rare earth elements is not the same thing as building a commercially viable rare-earth supply business.

A technology like phytomining ultimately has to answer a much broader set of questions:

Who owns the land or feedstock?

Which locations have the right mineral concentrations?

How much material can be recovered per acre?

What does harvesting cost?

How is the biomass processed?

What purity can consistently be achieved?

Who purchases the resulting material?

Can the product meet qualification requirements for downstream processors and manufacturers?

How quickly can an operation scale?

And perhaps most importantly:

Where does the technology outperform the existing alternative economically?

These are commercialization questions, not simply scientific ones.

The Opportunity for Early-Stage Critical Mineral Companies

Companies developing technologies like phytomining frequently sit at the intersection of several industries.

Agriculture.

Mining.

Energy.

Advanced materials.

Manufacturing.

Government.

Defense.

That creates enormous opportunity—but also commercialization complexity.

A startup may need relationships with landowners and mining companies to secure feedstock, universities and laboratories to validate the technology, processors to refine material, manufacturers to qualify it, government agencies to provide non-dilutive funding and strategic customers willing to support pilot projects.

The companies that successfully navigate those relationships could create entirely new supply chains.

And that may ultimately be the bigger story.

We May Need to Redefine What a Mine Looks Like

Some of the most important innovations in critical minerals may not come from building larger excavators or digging deeper pits.

They may come from plants.

Microorganisms.

Waste streams.

Recycling systems.

Advanced separation technologies.

Artificial intelligence.

And combinations of technologies we are only beginning to commercialize.

The rare-earth industry is therefore approaching a fascinating transition.

For decades, the challenge was largely geological:

Where are the minerals?

The next generation of companies is asking a more powerful question:

How many different ways can we economically recover them?

Companies like Rare Flora are demonstrating why that question matters.

If phytomining and related technologies can move successfully from research to commercial deployment, land that once appeared uneconomic could become productive. Mine waste could become feedstock. Plants could become part of mineral-processing infrastructure.

And the next major critical-minerals opportunity might not look much like a mine at all.

About Audenter Growth Advisors

Audenter Growth Advisors works with emerging technology, energy, advanced materials and industrial companies to turn technical innovation into commercial opportunity.

For companies developing new approaches to critical minerals, the challenge extends beyond proving the technology. Building partnerships, identifying pilot customers, validating markets, securing non-dilutive funding, navigating government programs and developing repeatable commercial models are often what determine whether an innovation successfully moves from the laboratory to the market.

Innovation creates possibility. Commercialization creates impact.

Act Boldly. Grow Wisely.