Nice finish, easy to place in the garden.
Alice
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Kopero Electroculture
Kopero Electroculture
Four copper antennas for a bed, a pot, or the garden. Copper all the way through, stake included, in 30 or 60 centimetres.
Regular price
€39,95
Regular price
Sale price
€39,95
Taxes included.
Set of 4, entirely solid copper
No wooden core: the stem itself is copper too
Choice of 30 or 60 cm
Quantity
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Pay securely with iDEAL, PayPal, Klarna, Bancontact and credit card
Order before 11:30 pm on a weekday, delivered tomorrow
30-day right of return, your money back if you're not sure
Delivery across Europe
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Specifications
- Material
- 100% solid copper (including the stake)
- Set
- 4 antennas per set
- Lengths
- 30 cm or 60 cm
- Dimensions
- stake diameter 5 cm
In the box
- Scannable digital guide
Shipping and returns
We ship from the Netherlands to the whole of Europe. Order on a weekday before 11:30 pm, and your order goes out that same weekday under our current shipping promise. You have a 30-day right of return: if you're not happy with it, send it back and get your money back. See also our shipping policy and refund policy.
Why copper works
Kills bacteria on contact
Changes the water it touches
A mineral your body needs
Long used for skin and recovery
For the pot on your balcony
The 30 cm antenna is the most practical size for smaller plants and pots, indoors or outdoors. Push the antenna upright into the soil, with the copper coil above the plant.
Just as at home outdoors among the plants
Next to a pot, the 30 cm antenna also works well among smaller vegetable plants. Same copper coil, just closer to the ground.
What you actually get
This set of 4 copper electroculture antennas is placed in a flower bed, vegetable garden, or beside a pot, following the tradition of electroculture: a way of gardening practiced since the mid-eighteenth century. Available in 30 cm and 60 cm.
The antennas are made entirely of 100% solid copper, including the rod itself — not just the coil on top of a wooden stake. This makes them more durable than versions with a wooden stake, which can decay over time, and also means you have more total copper (and therefore more conductive surface) in the ground. It's the same independently tested copper quality as our drinkware: 99.21% pure copper.
The first reports of electrified plants date from 1746, when Dr. Maimbray in Edinburgh electrified myrtle shrubs for a month and saw new shoots and flowers appear. Abbé Nollet reported to the French Academy in 1749 about mustard seed that germinated faster. In 1904, Finnish physicist Selim Lemström built on this tradition, inspired by the rapid tree growth in the far north; for nearly every crop he treated, he measured higher yields, up to about one and a half times the expected output. French inventor Justin Christofleau brought the method to a wide audience in 1925 with his book "Électroculture" and his metal garden rods.
Recent history shows how seriously this approach is taken. The British Ministry of Agriculture ran its own Electro-Culture Committee from 1918 to 1936, which reported yield increases of 30 to 50% in field trials. In China, a government-funded electroculture program is running in greenhouses covering more than 3,600 hectares combined: the Chinese Academy of Agricultural Sciences reported 20 to 30% higher vegetable yields there, with 70 to 100% less pesticide use. And in 2022, researchers published a study in Nature Food in which peas under a self-generated electric field germinated 26.3% faster and yielded 17.9% more.
Copper itself is no stranger to plants: it is an essential micronutrient, involved in photosynthesis, among other things.
Features
- Set of 4 antennas, entirely solid copper (no wooden stake)
- Available in 30 cm and 60 cm
- Spiral-shaped copper wire that captures energy from air and earth
- Part of the electroculture tradition dating back to the eighteenth century
- Field research reported yield increases: 30-50% (British Electro-Culture Committee), 20-30% (Chinese greenhouse program), and +17.9% for peas (Nature Food, 2022)
- Also usable indoors, in pots and planters
- No power, batteries, or maintenance required — works day and night
- Includes scannable usage instructions
What makes this special
Entirely solid copper
Not just the coil, the stem itself is copper too. No wooden core that can rot.
30 or 60 cm
The shorter size suits pots and smaller plants, the longer one reaches further in a bed or vegetable garden.
A tradition of experimentation
Electroculture dates back to 1746 and has since prompted serious follow-up research, from the UK's Ministry of Agriculture to a 2022 study in Nature Food.
No power or batteries
The antennas work entirely passively. You push them into the soil and leave them alone all year round.
A colour change that comes with pure copper
Solid copper changes colour a little on its own, even outdoors in the garden. That's completely normal, and even a sign of pure copper; it doesn't affect how well it works. How to care for the antennas is in the care guide.
Composition
0,00%
copper
99.21% copper, measured independently
The material is analysed by RTC Laboratory in Moradabad, a NABL-accredited lab, tested to ASTM-1621 and IS-228. The measurement came out at 99.21% copper and 0.75% zinc. That zinc is not an additive but a residue of the casting process: it makes the copper marginally stronger and changes nothing else. Food safety is covered by a second report, from URS Products and Testing, tested against EC 1935/2004, EU 10/2011 and REACH.
- 99,21% copper
- 0,75% zinc
- 0,04% remainder
- RTC Laboratory Moradabad
- composition, NABL-accredited
- URS Products and Testing
- food safety, EU regulation
- 19 heavy metals
- every one measured as "Not Detected"
From coil to tip: entirely copper
Not copper wire wrapped around a wooden stake, but four complete antennas of solid copper in the size that suits your garden.
This isn't a wooden stake with a bit of copper wire: the entire antenna is made of copper.
The copper spiral forms the distinctive top of every electroculture stake.
The compact size suits pots and small boxes well; 60 cm gives more height in a larger garden setup.
With four stakes you can cover several plants or mark out a defined shape around part of your garden.
Now you know what is in it
- 30-day right of return
- Order before 11:30 pm on a weekday, delivered tomorrow
- Delivery across Europe
Into the garden in six steps
The antennas go into the ground and that is it: no power, no batteries, no upkeep.
-
1
Unbox the antennas
Check that the coil at the top is still nicely round. If it's bent during transport, gently bend it back.
-
2
Choose the spot
Place the antenna by the plant you want to treat, on the sunny side and out of the way of foot traffic. Keep some distance from the roots. Indoors, just place one antenna in the pot of a houseplant.
-
3
Push it upright into the soil
Press the antenna about 8 to 10 centimetres into the soil, until it stands firm and doesn't tip over. Press on the stem, not on the coil.
-
4
Keep the coil clear
The coil should stick out above the plant and stay free of leaves and netting.
-
5
Spread out the four antennas
Place them around a bed, in the four corners, or use one antenna per pot. There's no fixed spacing.
-
6
Leave them in place
Copper is weather-resistant, so the antennas can stay outside all year, even in winter. They'll develop a green patina; that's normal.
Bekijk de volledige handleiding
In de verpakking zit ook een QR-code die je naar deze handleiding brengt.
Reviews of this product
5.0 from happy customers
Exactly the length I needed.
Kevin
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Frequently asked questions about this product
Does electroculture actually work?
Electroculture is a gardening tradition that dates back to 1746 and has since prompted serious research: the UK's Ministry of Agriculture measured 30 to 50% higher yields in its own field trials between 1918 and 1936, and Nature Food published a 2022 study in which peas under an electric field germinated 26.3% faster and yielded 17.9% more. Results vary by garden, plant and season; the best way to find out is to compare with and without an antenna in your own garden.
What's the difference between the 30 cm and 60 cm antennas, and which should I choose?
The 30 cm antenna is the most practical size for smaller plants, pots and window boxes, indoors or outdoors. The 60 cm antenna is meant for larger beds, vegetable patches and taller plants, and offers more reach. Both are made entirely of solid copper, including the stem, and work in exactly the same way.
Do I need to connect the antennas to anything?
No. The antennas work entirely passively, without power, batteries or maintenance. You simply push them upright into the soil and leave them be.
How deep do I push the antennas into the ground, and exactly where?
Push the antenna in by its stem, not the coil, about 8 to 20 centimetres into the soil depending on its length, until it stands firm and doesn't tip over. Place it by the plant you want to treat, on the sunny side and out of the way of foot traffic, with the coil sticking out freely above the plant and not covered by leaves or netting.
Can the antennas stay outside all year round?
Yes, copper is weather-resistant, so the antennas can stay in the garden all year, including winter. They will discolour over time; that's completely normal and doesn't affect how well they work. Just take them out before digging or mowing. More on caring for them is in the care guide.
Not what you were after? No problem.
You have a 30-day right of return. Copper does take some getting used to: it tarnishes, it feels heavier in the hand than stainless steel, and now and then you will want to polish it. Give it a few weeks. If it is still not what you were after, send it back and get your money back.
Read the return policyTry it without risk
- 30-day right of return
- Order before 11:30 pm on a weekday, delivered tomorrow
- Delivery across Europe