tontau – The patented, revolutionary irrigation system for your garden

Sustainable, electricity-free, modular: tontau delivers precisely the amount of water your plants need – powered by the unique capillary effect of clay.
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tontau ONE

Flexible Irrigation System – Efficient and Easy to Retrofit

Perfect for already planted garden beds: tontau ONE is installed vertically, making it easy to set up and deliver precise, water-saving irrigation directly to the roots. Sustainable, simple, and flexible – ideal for any garden bed. 

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tontau TWO

Invisible irrigation for sustainable gardening.

tontau TWO is installed horizontally underground, provides a natural, invisible solution for optimal plant irrigation. Perfectly set up at the beginning of the season, this innovative system delivers water evenly directly to the roots. tontau TWO combines efficiency with sustainability, making it the ideal choice for those who plan long-term and want a reliable irrigation system. Simply plug & play.

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Use up to 70% less water
Up to 15% higher yield
Use up to 70% less water
Up to 15% higher yield
Use up to 70% less water
Up to 15% higher yield

  • Less Water

    With tontau, you can save up to 70% water by delivering it directly to the plant roots, avoiding evaporation losses.

  • Maximum Flexibility

    Vertical or horizontal, aboveground or underground – tontau adapts perfectly to your garden, offering maximum versatility.

  • Fully Sustainable

    Made from certified, low-fired clay, tontau releases only as much water as your plants truly need.

  • tontau ONE

    The plug-and-play system for targeted or small garden beds is easy to connect and ready to use right away.

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  • tontau TWO

    Installed underground, tontau TWO ensures reliable and need-based irrigation for your plants from the start of the season.

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Here's how it works

  • 1. CONNECT

    Connect the hose, tighten the clamp – done! No matter whether 1/2 inch or 3/4 inch, tontau adapts flexibly to your setup.

  • 2. DIG IN

    Place tontau vertically or horizontally in the ground. Flexible, simple and exactly where it is needed.

  • 3. WATER

    Water, let it stand and lean back. tontau supplies your plants precisely and as needed - all by itself.

  • Up to 70% less water – thanks to underground irrigation.

  • Ancient natural material meets smart, modern design.

  • Weeks of worry-free watering – even on vacation.

  • Clay filters out impurities from water.

What our customers say

I'm thrilled! I no longer have to worry about whether the vegetables in my garden allotment can survive a few days without watering!

Kati P. from Amberg

At first, I was a bit skeptical if tontau would really work as easily as promised, but this year, I’ve harvested more than ever before! You can tell the plants always have enough water.

Carsten W. from Limburg

I first tested tontau with my cucumbers. Works great :)

Timo W. from Hagen

We used tontau ONE to water individual shrubs. Brilliant solution.

Frank R. from Lüdenscheid

How did no one come up with this before? It’s just so simple. 5 out of 5 stars.

Klaus M. from Cologne

FAQ

What makes tontau different from other irrigation systems?

tontau works completely without electricity and without water pressure - thanks to natural capillary action. In contrast to electronic systems or drip irrigation, tontau works sustainably, requires little maintenance and adapts flexibly to your beds.

How much water can I save with tontau?

With tontau you can reduce water consumption by up to 70%. Thanks to the targeted, needs-based water delivery directly to the roots, not a drop is wasted - ideal for sustainable garden irrigation.

Can I also retrofit tontau into existing beds?

Yes! tontau ONE is perfect for retrofitting as it is inserted vertically into the ground. Installation is quick and easy - without disturbing plants.

How deep do I have to bury tontau?

We recommend a depth of at least 10cm for the tontau TWO. But that depends entirely on how deep your plants are rooted. It is important that your system is well covered with soil so that no water is wasted. With tontau you are flexible: You can lay the system both horizontally (tontau TWO) for long-term projects and vertically (tontau ONE) - depending on how deep you want to irrigate.

Do I need running water or pressure?

No. tontau works without pressure. You can easily connect the system to a rain barrel - just turn on the tap and let the water “stand”

How durable is the tontau irrigation system?

tontau is made of high quality fired clay that is sturdy and durable. The material releases water reliably for years without becoming clogged or wearing out. To ensure you enjoy it for a long time, we recommend a little maintenance once a year. Rinse once and brush off your tonaus.