Nice finish, easy to place in the garden.
Ilse
Verified purchase
4.6
from happy customers
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.
Shipping calculated at checkout.
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 credit card, PayPal, Apple Pay and Klarna
Order before 11:30 pm on a weekday, delivered in 2-3 working days
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
- Four copper antennas in the chosen length
- Sturdy branded 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; across Europe it usually arrives within two to three working days. 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
How it arrives
You unpack a sturdy branded box with a Kopero card inside: the QR code on it takes you to the digital manual. So you can give it away straight from the box, without wrapping anything around it.
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 in 2-3 working days
- 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.
Read the full guide
The packaging also carries a QR code that takes you straight to this guide.
Reviews of this product
4.6 from happy customers
Exactly the length I needed.
Kees
Verified purchase
Wow, my basil suddenly took off. Much fuller leaves, and it didn't bolt straight away like it usually does. Really happy with it.
Marieke
Verified purchase
Honestly, I didn't expect much, but my strawberries are clearly putting out more new leaves. The four antennas are each in a different planter now.
Daan
Verified purchase
Since I put one next to my pepper plant, it finally seems to have woken up. New shoots, a sturdier stem. Could be coincidence, but I'm certainly not taking it out again.
Sanne
Verified purchase
Fewer aphids on the mint. I only noticed after about three weeks. Normally that plant is covered in them by June.
Wouter
Verified purchase
My drooping parsley perked up surprisingly fast. I watered it exactly as always, so yes, I look at electroculture rather differently now.
Anne
Verified purchase
The 30 cm size disappears nicely among my herbs, and the four spirals were in place within minutes.
Ruben
Verified purchase
No miracle cure, but I do see a difference: more compact foliage and much more growth on the sunny side. Pretty powerful for such a simple piece of copper.
Fleur
Verified purchase
Put two by the tomatoes and two by the herbs. The tomato plant now has thicker stems and the basil is barely being nibbled. I hadn't expected that.
Bram
Verified purchase
I always test before I get enthusiastic. One pot with an antenna and one without, same soil, same spot. After five weeks the one with copper was clearly fuller.
Oliver
Verified purchase
My rosemary did almost nothing for months. Now fresh tips are coming through everywhere. Just wow.
Lukas
Verified purchase
The solid copper feels sturdy and takes on a beautiful natural colour outdoors.
Camille
Verified purchase
We kept getting little flies around an indoor planter. Since the antenna went in there are noticeably fewer. No idea why, but it's welcome.
Lucia
Verified purchase
The courgette in its tub is growing more evenly this year and the young leaves stay intact. I'm careful with big claims, but I can simply see this result. I still water on the same days and haven't changed anything about the feed. That's exactly why I find it so interesting to follow. Next spring I'll put the antenn...
Ines
Verified purchase
The set arrived neatly packaged and the online guide made it clear straight away how to get started.
Freja
Verified purchase
An original gift that my mother started using right away.
Astrid
Verified purchase
My tomatoes have grown ridiculously well this year. The plants stand sturdier and I already have more flower trusses than around this time last year.
Noor
Verified purchase
I was mainly curious about insects and nibbling. The leaves around the antennas stay remarkably intact and the young plants keep growing undisturbed.
Joris
Verified purchase
Powerful stuff. The 60 cm antenna by my courgette sticks up well above the leaves, and that plant is almost comically big by now.
Lotte
Verified purchase
I have two rows of beans side by side. Only one row has the copper spirals. Those plants are taller and greener. To me the difference is very clear.
Thomas
Verified purchase
The young cabbage stays beautifully green this year and keeps growing strongly. Finally full plants I can actually harvest from.
Nienke
Verified purchase
The long antennas are ideal for my raised beds and stay clearly visible among the tall foliage.
Koen
Verified purchase
After a wet spell the plants around the antennas recovered faster than the rest of the border. New growth came back there first.
Eline
Verified purchase
My neighbour asked what I had stuck in the soil. A month later he asked again, but that time because the sunflowers were so tall. That says enough for me.
Pieter
Verified purchase
I mainly expected a fun experiment. The peppers are flowering more now and I see fewer aphids on the tips. I'm convinced.
Amelia
Verified purchase
The potatoes stand stronger and the foliage stays fresh longer. Wow, I wish I'd tried this sooner.
Hannah
Verified purchase
Good that the whole antenna is copper, with no wooden part sitting in the wet soil.
Louis
Verified purchase
My pumpkin is climbing over the frame faster this season and has less yellow leaf. I changed nothing else about feed or water.
Mateo
Verified purchase
After this first season I'm really curious about next year. The sturdier stems and the amount of new leaf stand out most. After strong winds everything was still firm and upright. The plants look strong, and my neighbour has now asked whether I'd order a set for her too.
Tiago
Verified purchase
After a few strong gusts all four were still standing perfectly upright.
Mikkel
Verified purchase
The dark patina goes surprisingly well with the green of the vegetable garden.
Hugo
Verified purchase
Write a review
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 policy
Try it without risk
- 30-day right of return
- Order before 11:30 pm on a weekday, delivered in 2-3 working days
- Delivery across Europe
Read next
Placing electroculture antennas: where, how deep and how many
Which plants do you put a copper antenna beside, how deep does it go into the soil, and how many do you need? The pra...
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Electroculture: a centuries-old gardening tradition rediscovered
From Abbé Nollet in 1749 to modern studies: the history of electroculture and electric fields in the garden.
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What our copper products are made of
The measured composition of our copper, the laboratory that measured it, and the European food-safety testing behind ...
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Kopero Electroculture
€39,95