Check out Rachel Becker’s Cal Matters piece on the ongoing illegal grow saga. We’ve covered this topic before, but nothing seems to change much.
For over a decade, Wengert and her colleagues have warned that illegal cannabis grows like this one dangerously pollute California’s public lands and pristine watersheds, with lasting consequences for ecosystems, water and wildlife.
Now, they’re sounding another alarm — that inadequate federal funding, disjointed communication, dangerous conditions and agencies stretched thin at both the state and federal levels are leaving thousands of grow sites — and their trash, pesticides, fertilizers and more — to foul California’s forests.
Dozens of fertilizer bags wept blue fluid onto the forest floor. Irrigation tubes snaked across the craters of empty plant holes. The cold stillness felt temporary — as if the growers would return at any moment to prop up the crumpled tents, replant their crop and fling more beer cans and dirty underwear into the woods.
Wengert has tallied nearly 7,000 abandoned sites like this one on California’s public lands. It’s almost certainly an underestimate, she said. Her team knows of only 587 that have been at least partly cleaned up.
No government agency can provide a comprehensive count; several referred CalMatters back to Wengert’s nonprofit for an unofficial tally.
Most of the sites Wengert’s team identified are in national forests, where “limited funding and a shortage of personnel trained to safely identify and remove hazardous materials” are driving a backlog in cleanups, a U.S. Forest Service spokesperson told CalMatters via an unsigned email.
The federal government, the spokesperson said, has dedicated no funding for the forest service to clean them up. And it’s leaving a mess in California.
And probably in other states as well.
The federal government owns nearly half of the more than 100 million acres in California. But it’s California’s agencies and lawmakers taking the lead on tackling the environmental harms of illegal grows — even as the problem sprawls across state, federal and privately managed lands.
The California Department of Fish and Wildlife’s policy is to clean up all grows spotted on its 1.1 million acres of wildlife areas, ecological reserves, and other properties, officials say.
Staff assist with cleanups on federal lands “when asked,” said cannabis program director Amelia Wright — typically on California’s dime. But, she said, “That’s not our mandate.”
Fees and taxes on California’s legalized cannabis market fuel state efforts — supporting the California Department of Fish and Wildlife’s cannabis program and funding tens of millions of dollars in grants for rehabilitating places damaged by cultivation. These grants can cover cleanups and sustainable cultivation projects, or even related efforts such as fish conservation.
The department has helped remove almost 350,000 pounds of trash and more than 920 pesticide containers from grows on public lands over nearly a decade.
But former Assemblymember Jim Wood, a North Coast Democrat, said that as he prepared to leave office in 2024, progress on cleanups was still too slow.
“It doesn’t reflect what I see is the urgency to watersheds, and the water and the people that are served by them,” he said.
In 2024, lawmakers passed Wood’s bill directing the Fish and Wildlife Department to conduct a study to inform a statewide cleanup strategy for cannabis grows. The law requires the department to provide regular reports to the Legislature about illegal cultivation and restoration efforts on lands both public and private.
To Wright, that’s a path forward, however prospective it may be.
“It just feels like such redemption right now for many of us,” Wright said. “It’s a one-of-a-kind program. So we didn’t have a playbook — we’re still creating it.”
But the study, which Wengert’s organization is conducting on the state’s behalf, isn’t due until next year. Meanwhile, the bloom of illicit pot grows on private land has been demanding California’s attention, a growing problem since voters legalized cannabis in 2016.
“It’s like whack a mole. They pop up in a new location, and then we have to go there — but the impacts are occurring across the landscape,” said Scott Bauer, an environmental program manager with the Department of Fish and Wildlife’s cannabis office.
The California Department of Justice told CalMatters it recently identified a “substantial increase of illicit cannabis cultivations on or adjacent to public lands.” Of the 605 sites where a multiagency state and federal task force ripped out illicit cannabis plants, roughly 9% were on public lands — up from an average of 3% to 4%.
“Everybody thought with legalization that a lot of these problems would go away,” said Wood, the former Assembly member.
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A federal void
In 2018, a federal audit lambasted the U.S. Forest Service for failing to clean up — or even document — trespass grows in national forests.
The agency was finding and eradicating cannabis grows in national forests effectively. But its failure to consistently clean them up, the audit said, put “the public, wildlife, and environment at risk of contamination” and could allow growers to return more easily.
Little has changed. From 2020 through 2024, when Gabriel worked for the agency, a spokesperson said the Forest Service “prioritized reclaiming sites over investigating active grows.”
But the agency said it still has received too little funding and has too few personnel trained to work with often hazardous materials. And the backlog persists. How big it is, the Forest Service wouldn’t say. After declining an interview request and taking two months to reply to emailed inquiries, a spokesperson said CalMatters must submit a public records request.
The Forest Service now is shifting the responsibility for cleanups to individual forests. That, too, contributes to the backlog, the spokesperson said.
U.S. Rep. Jared Huffman, a California Democrat and ranking member of the House Natural Resources Committee, said he has tried repeatedly to direct more funding to cleaning up trespass grows on federal lands, but with little success in Congress.
“We have tried just about everything,” Huffman said. “It’s clearly not enough.”
Now, under the Trump administration, the Forest Service is even more understaffed. A spokesperson said while law enforcement staffing “has remained steady,” roughly 5,000 non-fire employees “have either offboarded or are in the process of doing so” through “multiple voluntary separation programs.”
Having worked with some of those chemicals in the past, I don’t think handling them is an “other duty as assigned.” It sounds like it needs a dedicated and specially trained workforce, perhaps with hazard pay incentives?





