Plant myths, fact-checked
Myths Demystified
One widely-repeated piece of plant advice per entry — delivered with a verdict, backed by cited science. Almost every plant myth has a kernel of truth that keeps it alive; we find the kernel, name the actual mechanism, and tell you what to do instead.
What it is
A verdict, with receipts
Every entry lands on one of five verdicts — True, Mostly True, It's Complicated, Mostly False, False — and shows the work. Cited extension services and peer-reviewed sources, not vibes.
Who it's for
Growers tired of contradicting advice
For people who keep hearing the same tips from the same well-meaning corners of the internet and want to know which ones survive a careful look. Apprentices and Growers alike.
How it's written
Opinion-bearing, citation-backed
Where the evidence is clear, we say so. Where it's nuanced — "it depends on the plant" — we say that too, and name what it depends on. No hedging for the sake of hedging.
Settled
The myths, demystified.
Status: It's Complicated
Myths Demystified · No. 06
Should you amend the planting hole?
Dig a hole, mix in compost, set the tree in the good stuff. For one planting hole it gives trees and shrubs no head start, and it can leave them settling and leaning as the soft pocket sinks. Gilman, Watson, and Schuch on why the backfill doesn't help, the bathtub effect, and when improving your soil actually pays off.
Status: It's Complicated
Myths Demystified · No. 05
Is bottom watering better for your plants?
Bottom watering is having a moment, and it genuinely works: the crown stays dry and a dried-out mix drinks evenly again. The catch the trend skips is salt, which watering from below strands at the top of the pot instead of flushing it out the bottom. Guttormsen's 1969 work, a modern container study, and the two-minute fix.
Status: Mostly False
Myths Demystified · No. 04
Do houseplants clean your indoor air?
The idea that a few pothos scrub the toxins from your living room comes from one 1989 NASA study of sealed chambers. When Drexel engineers put 30 years of plant research on the same scale as an open window, the effect all but vanished. What the science actually shows, and what really cleans indoor air.
Status: It's Complicated
Myths Demystified · No. 03
Are ice cubes a good way to water orchids?
Three ice cubes a week, printed right on the sleeve. A funded study says the orchids are fine; the American Orchid Society still says watch the cold. What the research really shows, and the safer habit to build.
Status: False
Myths Demystified · No. 02
Do rocks at the bottom of pots improve drainage?
A layer of gravel for better drainage. It's the most repeated piece of potting advice there is, and it makes drainage worse. Washington State, Illinois Extension, and Spomer's foundational research on perched water tables, the substrate physics that's nearly a century old, and what actually keeps roots out of standing water.
Status: Mostly False
Myths Demystified · No. 01
Does misting actually raise humidity?
It's the most repeated advice in houseplant care. It's also one of the least effective. Penn State, Iowa State, and University of Maryland Extension on what a spray bottle actually does — and the three methods that do the real work.
In the queue
What's next.
The next myths in the editorial calendar. Subjects locked, verdicts pending; titles may sharpen on the way to publish.
Myths Demystified · No. 07