Harvst WaterMate Pro – Automatic Greenhouse Watering Kit

From £335.99

The Harvst WaterMate Pro automatic watering system is a high power, high capacity system for large greenhouses and polytunnels up to 12’ x 18’, or 40 sq m. It can also be used for grow-houses, cold frames or even outdoor pots, veg plots and allotments.

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The Harvst WaterMate Pro automatic watering system is a high-power, high-capacity system for large greenhouses and polytunnels. It waters for you using a combination of timer and environmental data to give your plants just the right amount of irrigation.

  • 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 120 drippers (120 plants), or 40 sprayers for 40m2 coverage
  • The ‘Mains’ power version adds additional ports for extra pumps, grow lights and heating which can be used for propagation


  • The Harvst WaterMate Pro 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.The Pro pump is capable of delivering 35psi which means you can use soaker / porous hose.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

  • If you have mains pressure water at your greenhouse or polytunnel, choose the garden hose mode. Otherwise choose the pump model for a pressurised, high flow rate off-grid system which can run from a water butt or tank.

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:

  • Control unit (approx 190mm x 120mm x 45mm)
  • Control unit mounting plate
  • Solar panel or power supply
  • 12 litre/min inline pump with inlet filter (for pump model)
  • Air temperature sensor
  • Dual electric water valves
  • 6m of 13mm braided inlet hose
  • 2 x 10m LDPE distribution pipe
  • A selection of joints and pipe fittings
  • 20m of 4mm micro irrigation pipe
  • 24 pressure compensated 4 litre per hour drippers 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
  • Includes both greenhouse and polytunnel fixings
  • 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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