Irrigation for Greenhouses

Our automatic watering system for greenhouses uses smart temperature and humidity sensors to detect when the plants need hydration. It can manage separate zones for different crops and draw water from either a tank or water butt.

Why Smart Irrigation is Essential for Greenhouses

Greenhouses let you control light and warmth, but getting watering right takes more than guesswork. In these enclosed environments, every drop of water must be supplied manually or through an automated system.

In addition to this, temperature and humidity can fluctuate rapidly, making it challenging to maintain consistent soil moisture. Too much water can lead to fungal growth, while too little can cause plants to dry out within hours.

A greenhouse auto watering system, like WaterMate, helps maintain this balance through timely watering and humidity sensors. It automatically adjusts watering to suit changing greenhouse conditions, providing each plant with the optimal amount of hydration for steady growth.

  • Up to 80% Less Water Used

  • Targeted Watering = Zero Waste

  • Reduces Runoff and Overwatering

How WaterMate Works for Greenhouses

WaterMate is an automated greenhouse watering system built for precision and efficiency in all indoor growing conditions. It offers reliable watering control that adapts to temperature and humidity levels so plants receive exactly what they need without any water waste.

Our setup also supports solar operation, giving greenhouse growers a flexible way to automate watering without relying solely on mains power. By replacing guesswork with data-led precision, WaterMate helps greenhouse growers cut back on overwatering and manual effort while improving crop consistency.

Smart irrigation systems like this have been shown to significantly reduce water use and root disease risk, supporting healthier growth and better yields season after season.

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Challenges That Automatic Watering Solves

Temperature Changes: Responds to rapid temperature changes with precise timing

Fungal Growth: By optimising water flow using smart moisture sensors, WaterMate helps avoid humidity-related fungal issues

Uneven watering: Offers even watering solutions for mixed planting beds

Manual watering: Keeps plants hydrated while you're away, using smart sensors, eliminating the need for manual watering.

A greenhouse self watering system like WaterMate maintains balanced moisture through every season. It adapts to changing indoor conditions and supports healthy root growth with minimal supervision. Automating daily watering gives each plant in your greenhouse consistent care while helping reduce waste and effort.

Here’s How to Set up Watermate

The Benefits of Automated Watering for Greenhouses

An automated greenhouse watering system gives growers a dependable way to maintain the right moisture level at all times. It removes the guesswork of manual watering and helps plants grow in a more stable, balanced environment.

Using a greenhouse auto watering system ensures each plant receives exactly the hydration it needs, no matter the weather outside. The result is stronger growth, fewer diseases, and a more efficient use of water.

Additionally, a greenhouse irrigation timer adds another layer of control by automating watering schedules with precision. It allows growers to set consistent cycles that match their plants’ needs, supporting steady growth and reducing water waste without constant supervision.

Why Upgrade to Automated Watering? 

Here’s why greenhouse growers choose automated watering:

  • No need to adjust for weather manually
  • Saves water by preventing unnecessary run-off
  • Frees up your time each week
  • Helps avoid wilt, stress and fungal problems

How Smart Irrigation Improves Greenhouse Results

Whether you’re growing tomatoes or exotic flowers, smart irrigation gives you better results with less stress.

Instead of relying on fixed schedules, an automated greenhouse watering system like WaterMate uses sensor data to maintain ideal soil conditions and protect crops from water stress or fungal issues.

When set up correctly, here’s how growers can improve yield quality in their greenhouse using WaterMate:

  • Prevents waterlogging in seedlings
  • Supports high-yield crops like tomatoes
  • Enables reliable propagation from seed
  • Improves flowering consistency

By maintaining balanced moisture and timing each watering cycle accurately, a greenhouse watering system with a timer encourages stronger yields with fewer adjustments.

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What Sets Our Watermate Range Apart?

  • Automated sensor-based irrigation system

  • Genuinely ‘smart’, responding to live conditions

  • Works off-grid - no mains power required

  • The only ‘everything you need in one box’ complete kit

  • Responds to temperature changes, adjusting watering frequency on hot or cool days

  • Uses industry-standard irrigation fittings

  • Most customisable and powerful (WaterMate Pro), irrigation system available 

  • The only system designed and Made in Britain
Buy Your Automatic Irrigation System

Off-Grid and Solar Power Use in Greenhouses

No mains power? No problem. Our WaterMate solar kit will keep your greenhouse watering system running smoothly without the need for electrical sockets. 

A compact 10W solar panel charges an onboard battery, giving the controller enough power to water for 10 minutes / day during an averagely sunny day in the UK, which equates to 120 litres. Additional solar panels can be added for shady locations, or connected to mains power where available.

Benefits of a Solar-Powered Irrigation System:

  • Works through cloudy weather
  • Charges efficiently from a 10W solar panel
  • Suitable for off-grid greenhouses without sockets

Which Greenhouse Growers Use WaterMate?

From home growers to small-scale food producers, WaterMate supports every kind of greenhouse user who values consistent plant care. Our automatic greenhouse watering system adapts to different greenhouse types and crop requirements worldwide.

Home gardeners with greenhouses

Keep plants healthy while cutting down on daily watering, providing steady moisture for tomatoes, herbs, flowers, and leafy greens.

Fruit and veg growers

Uniform hydration avoids dry or soaked soil that can affect young plants.

Frequent travellers

If you love fresh produce and want your garden to continue thriving when you're on holidays or working away, WaterMate is the ideal solution.

Collectors and enthusiasts

Grow orchids, chillies, succulents, or other specialist crops with precision watering that protects delicate roots and promotes reliable blooming.

WaterMate Models & Kit Options For Every Garden Size

Greenhouses come in all sizes, and Harvst’s automatic greenhouse watering kits are designed to suit each type. Every WaterMate model provides accurate, consistent watering and efficient water use for different growing setups. It’s easy to DIY your own set up, or add on extra zones, too. 

From compact greenhouses to larger crop houses, you’ll find a reliable WaterMate model for your needs.

  • WaterMate Mini

    Dual zone | Up to 6 m²

    This auto greenhouse watering system covers up to 6 sq m and supports up to 40 plants. It includes WiFi connectivity and can draw water from a tank or a mains supply, depending on your setup. Compact yet capable, it’s a straightforward way to automate watering for seed trays or small crops. 

    Buy WaterMate Mini 

  • WaterMate Pro

    Expandable Multi-Zone | Up to 6 zones

    The Pro model manages 2 independent watering zones (expandable up to 6 zones) and covers up to 20m2 per zone. It features a built-in greenhouse irrigation timer for precise scheduling and supports both solar and mains operation. Its flexibility makes it suitable if you’re managing mixed crops within a single structure.

    Buy WaterMate Pro 

Product specifications and features are subject to ongoing improvement. For the latest details, please see individual product listings.

FAQs

What crops grow best with Harvst?

Harvst’s self watering greenhouse systems suit a wide range of plants. The WaterMate Mini works well for herbs, salad leaves and seedlings, while the Pro model provides balanced watering for fruiting crops and mixed beds.

Does it work with water butts?

Yes. Both WaterMate Mini and WaterMate Pro can draw water from a tank or water butt using the pump system. This flexibility makes our automatic watering system for greenhouses easy to set up and adapt for mains or stored water use.

How long does installation take?

Not long at all. Each greenhouse watering kit includes clear, step-by-step instructions, all tools required and most users have their system up and running in a morning or afternoon. The pipework is flexible and a top tip is to put the ends into hot water for easy connection to various fittings.

What if I don’t have WiFi in my tunnel?

Our WaterMate models are fully functional without an active WiFi connection. However, if it’s connected to WiFi you can check up on the watering schedules and amend them remotely.

What's the best time of day to water greenhouse crops?

Morning is typically the best time to water your plants, as it reduces evaporation and lowers the risk of fungal growth. A greenhouse watering system with a timer, like WaterMate, automates this process, ensuring plants are watered at the right time without daily effort.

Can it handle winters?

Yes, although the control unit should be covered. Part of the manufacturing process is ensuring that Harvst’s solutions are designed to handle changing climates.

Automate Your Greenhouse Watering with WaterMate

Keep your plants thriving with WaterMate, the reliable automated watering system for greenhouse setups worldwide. Designed to make greenhouse care easier and more efficient, all our kits deliver precise results and can be adapted to changing conditions for a stronger yield.

Join thousands of growers who trust Harvst’s greenhouse self watering system to save time and reduce water waste while simplifying daily care.

Order your WaterMate today and see the improved results for yourself!