Harvst WaterMate Mini – Automatic Greenhouse Watering Kit

From £299.99

The WaterMate Mini automatic watering system is a complete irrigation kit for greenhouses up to 6′ x 8′.

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The Harvst WaterMate Mini automatic watering system is a complete irrigation kit for greenhouses up to 6′ x 8′. It waters for you using a combination of timers and environmental sensors to give your plants just the right amount of water.

  • Everything you need included!
  • Supplied with a 10W solar panel to run anywhere, or power off 240V mains
  • More water on hot, sunny days. Less water when it’s cool or overcast
  • Dual watering zones for versatility and extra capacity
  • Pump system which can run from a water butt or garden hose
  • WiFi enabled (will run without internet too)
  • WiFi connection required to receive email alerts
  • Supports up to 40 drippers (40 plants), or 12 sprayers for 6 metres squared coverage
  • The ‘Mains’ power version adds additional ports for extra pumps, grow lights and heating which can be used for propagation

The Harvst WaterMate Mini allows you to water across two zones for precise control, reduced water consumption and healthier plants. Set timers to deliver regular and specific amounts of water when you want and for complete peace of mind program the temperature sensor to automatically trigger extra watering when it gets too hot.

WiFi enabled (will run without internet too) so you can remotely control and monitor your system and even receive email alerts for high/low temperature, when watering or if your tank is empty*. *Must be connected to home WiFi for alerts.


Your choice of power source

  • 100% solar powered
  • 240v mains supply

Your choice of water supply

  • Pressurised, high flow rate off-grid pump system which can run from a water butt or connect to a garden hose.

Choosing a Power Supply

Why choose solar power?

If you don’t have mains electricity in your greenhouse or polytunnel, with WaterMate you can still have powerful automatic watering. The battery is charged by a small solar panel which should be mounted outside to catch the most sun. Up to 10 minutes of watering time is possible per day in the summer (5 minutes most at one time).

Supplied with 3m of cable, extensions available.

Why choose mains power?

If you have 240v power, we recommend you use the mains version. You will be able to water for longer periods (if required … the pump can deliver plenty of water in just a couple of minutes), and won’t be limited by darker days in winter. You will be able to add more pumps/misters or even LED grow light, heated seed trays for propagation, or heater cables.

The power supply comes with 5m of mains flex.

What's in the kit?

The watering kit contains:

  • WaterMate control unit (approx 190mm x 120mm x 45mm)
  • Control unit mounting plate
  • Solar panel or power supply
  • Mini submersible water pump, 45mm diameter (for pump version)
  • An air temperature sensor
  • Dual electric water valves
  • 4m of 13mm braided hose for connecting the pump.
  • 10m LDPE distribution pipe
  • A selection of joints and pipe fittings
  • 10 greenhouse frame pipe fixings
  • 20m of 4mm micro irrigation pipe
  • 24 x pressure compensated drippers (4 litres per hour) and ground stakes
  • 12 x 4mm hose adapters
  • 10 x 360deg sprayers covering 1m2 each
  • 10 x 180deg sprayers covering 1m2 each
  • 6 x 4mm water taps
  • Web app for Android and iPhone

About the Manufacturer

Harvst: Our mission is to help you grow more.

For fresher food.

Grow more greens.
Grow more salad.
Grow more vegtables.

Eat fresh, all year round.


For our environment.

Fewer food miles.
Less nasty pesticides.
Less single use plastic.

It’s better to grow your own.


For you and your family.

For your health & wellbeing.
To teach your kids about growing.
To engage with nature.

Grow more, together.


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