Let me be honest here. No, burying a penny won’t meaningfully help your snake plant. I know that’s a flat answer to lead with, but it saves you digging around your couch cushions for loose change. The trick leans on an old idea about copper, and the part most people skip is that the coin in your pocket barely has any copper in it anymore.
Copper does have a real reputation in the garden. It’s an essential plant micronutrient, and copper-based fungicides are genuine products sold on shelves. So the belief isn’t pulled from nowhere. The idea just gets attached to the wrong object.
Why People Bury Pennies in Snake Plant Soil
Three claims show up over and over. First, that copper feeds the plant as a micronutrient. Second, that copper fights fungus and mold in the pot. Third, the vaguest one, that a coin slowly “enriches” the soil as it sits there.
I get why these stick. Copper really is one of the trace nutrients plants need, and copper really does appear in fungicide sprays. Take those two true facts, add a shiny coin, and you’ve got a tidy little life hack that sounds plausible before you think too hard about it.
The snake plant version in particular took off on social media, probably because snake plants are everywhere and nearly indestructible. People want a secret to make a tough plant even tougher. A free coin from the junk drawer is an easy thing to try. The problem is that the logic connecting the coin to the result never quite holds up once you look at what a modern penny is actually made of.
The Problem: Modern Pennies Are Mostly Zinc
Here’s the fact that quietly sinks the whole thing. U.S. pennies minted after 1982 are about 97.5% zinc with only a thin 2.5% copper plating on the outside. So the “copper coin” is really a zinc slug wearing a copper coat. Reach into your change and the odds are overwhelming you’re holding one of those.
Even the older, pre-1982 pennies that were mostly copper don’t dissolve into plant-available copper at any useful rate. A coin is inert metal. It just sits there. It is not a fertilizer, and it won’t hand its copper over to the roots on any timeline that matters to a houseplant.
And copper, remember, is needed only in trace amounts. Potting mixes and most soils already carry enough for a snake plant’s modest needs. So you’d be trying to solve a shortage that usually doesn’t exist, using an object that can’t deliver the nutrient anyway. That’s the scope worth being precise about: the 97.5% zinc figure is for U.S. pennies after 1982, not every coin in every country, but the broader point about coins being inert metal holds regardless of what’s in your pocket.
Does Copper Stop Mold or Fungus in Pots?
The antifungal claim deserves its own answer, because it sounds the most convincing. A buried coin cannot release enough copper to prevent mold or fungal trouble in a pot. The dose just isn’t there.
What actually causes fungus and mold in a snake plant pot is almost always overwatering and poor drainage, not a copper deficiency. Soggy soil is the real culprit. No coin fixes that.
There’s also a mild counterpoint worth noting. You don’t really want to be loading soil with extra metals, zinc included, as a habit. A single penny is a small amount, so this isn’t cause for alarm. It’s just one more reason the trick gives you nothing to gain and a small, pointless reason to not bother.
What Actually Keeps a Snake Plant Healthy
The good news is that snake plants are forgiving, and the care that works is boring and cheap. No coins involved. Here’s what matters:
- A well-draining, gritty mix that never stays soggy. Think cactus or succulent soil, or a regular mix cut with perlite or sand.
- Water only when the soil is dry. Snake plants genuinely hate wet feet, and more of them die from kindness than neglect.
- Bright indirect light. They’ll tolerate low light and grow more slowly there, but they don’t need to be baked in a sunny window.
- A balanced fertilizer only during the growing season, and lightly. Overfeeding does more harm than skipping it.
I’ll admit I’ve leaned on these basics after nearly writing off a plant. I had one snake plant that sulked for months, leaves going soft and leaning like it had given up on me. I’d been watering it on a schedule, which is the mistake I kept overlooking. Once I moved it into a grittier mix and just let the pot dry out properly between drinks, it stopped sulking. Not a penny in sight.
If you enjoy the idea of putting household odds and ends to work in a pot, there are tricks with actual logic behind them, like burying tea bags in the garden. Copper coins just aren’t one of them.
So, Should You Drop a Penny in the Pot?
Keep your pennies in the jar. There’s no established evidence the trick does anything for a snake plant, and the coin most of us would use is barely copper to begin with. A penny in the soil is just a penny in the soil. A grittier mix and a lighter hand on the watering can do the actual work, and those two changes cost you nothing but a little patience.
