Inside the strange online communities turning gardening into ecosystem philosophy

The people who keep swamps in jars

Every Tuesday — The Biggest Community You Never Heard Of

Something very strange is happening inside gardening communities online. I mean, gardening has always been strange. Any hobby involving people emotionally negotiating with tomatoes already exists slightly outside civilization. But this is newer, bigger. The kind of strange that only grows on the internet after thousands of people accidentally convince each other they are scientists, philosophers, and medieval forest witches at the same time.

Across Reddit, TikTok, Discord servers, niche forums, and Substacks, gardening is quietly mutating from a practical hobby into something closer to ecosystem mythology. At first glance, online gardening communities still look ordinary enough. Inside places like r/gardening and r/vegetablegardening, exhausted people are desperately trying to stop insects from eating their cucumbers alive while climate change turns July into living hell. These gardeners speak about weather the way sailors once spoke about storms.

Their gardens are becoming tactical operations.

Shade placement, soil temperature, pest defense, emergency watering schedules, raised beds engineered like tiny military fortresses. Then, somewhere deeper in the forest of the internet, the other gardeners appear.

The electroculture people. The copper antenna people. The “the soil is alive and possibly communicating with us” people.

These gardeners are no longer simply planting vegetables, they are conducting experiments. They stick copper rods into the ground because TikTok suggested atmospheric electricity might help tomatoes grow larger. They discuss fungal networks with the intensity of Cold War physicists. Entire Substacks now read less like gardening blogs and more like philosophical manifestos about dirt.

Writers like Niall McCrae helped push gardening away from simple “how to grow carrots” advice into something stranger and far more existential. Suddenly everyone is talking about biodiversity, microbial ecosystems, regenerative growing, and “living soil” as if they are rebuilding civilization from compost.

I blame millennials.

A generation that spent ten years trying to keep one nervous monstera alive in tiny apartments has now discovered backyards. Creators like Kevin Espiritu opened the door, but TikTok gardeners like Tanner Mitchell and the beautifully named @SproutSlut have gone fully off-road, convincing people to transform suburban spaces into dense food forests that look capable of hiding a small pagan society.

But none of these people are the true heroes of the story. The real lunatics live inside r/Jarrariums. The swamp jar people. The people sealing entire ecosystems inside old pasta sauce jars and then emotionally monitoring them for months like exhausted gods observing tiny wet civilizations.

A jarrarium is exactly what it sounds like. You take a glass jar and fill it with layers of gravel, soil, plants, algae, pond water, and usually one overly ambitious snail. The method partly evolved from the work of Diana Walstad, whose ideas about self-sustaining ecosystems accidentally inspired one of the internet’s most wonderfully unwell micro-communities.

Then comes the important part: You seal the jar. Forever. The ecosystem must survive on its own.

Plants create oxygen, organisms die, other organisms eat them. Algae blooms. Bacteria negotiate invisible treaties. Sometimes the whole thing balances beautifully into a miniature underwater forest. Sometimes one horrifying worm becomes the apex predator of the jar.

Both outcomes are celebrated equally.

Right now the community is obsessed with something called “wild harvesting,” which is exactly as suspicious as it sounds. People are climbing into muddy drainage ditches, collecting swamp water from parking lot puddles, scooping random weeds from local ponds, and dropping everything into jars just to “see what happens.”

The comments read like nature documentaries written by sleep-deprived philosophers.

“My snail survived the algae collapse.”

“There’s a flatworm now.”

“I think the copepods established a stable population.”

Nobody is trying to become productive here. That is what makes the entire thing feel strangely revolutionary. In a world where every hobby immediately becomes content, branding, optimization, monetization, or side income, thousands of people are spending six months emotionally invested in the political stability of organisms living inside old pickle jars.

Good.

Civilization desperately needs more useless fascination, especially the kind involving swamp water.

Grivio spends a lot of time exploring niche online communities like these. The internet is still full of tiny worlds most people never notice until suddenly they become obsessed with one themselves.

And honestly, that might still be the best part of being online.