Irrigation for Growing Indoors

Growing indoors demands precise, reliable watering to maintain healthy plants and stable conditions. Harvst’s WaterMate indoor irrigation system delivers automated, sensor-driven watering that supports consistent growth while conserving water and energy all year round.

Why Smart Irrigation is Essential for Growing Indoors

Humidity control and watering consistency can be difficult to master in enclosed environments such as greenhouses or polytunnels. One of the primary challenges of indoor growing is overly humid indoor conditions that can become a breeding ground for fungal infections and root rot. This impacts plant health, causing premature wilting and slow growth, which makes them prone to pest infections and other issues.

Indoor automatic watering systems address these challenges by delivering water precisely and consistently at the root, minimising fungal diseases by controlling ambient humidity. It also takes the pressure off you and addresses any inconsistency in watering schedules, freeing up your time for more important tasks. 

With an automatic plant watering system indoors, you can go away on holiday without worrying about your plants wilting and dying. Plus, the WiFi connectivity allows you to control your system remotely via our web app making it the perfect solution for busy growers who sometimes forget to water their plants!

  • Up to 80% Less Water Used

  • Targeted Watering = Zero Waste

  • Reduces Runoff and Overwatering

How WaterMate Works for Indoor Growing Environments

Harvst’s WaterMate is an efficient indoor watering system ideal for indoor growing areas such as greenhouses, polytunnels and conservatories. It delivers automated and precise watering based on your plant’s actual needs rather than following a fixed watering schedule. 

The system’s irrigation controller is equipped with temperature and humidity sensors that read weather conditions in real time, allowing it to adjust watering frequency and duration accordingly.

For instance, you could set 35c for example, as a temperature at which you’d like to trigger misting to cool your greenhouse or polytunnel, as well as provide extra water via drippers connected to a different zone. This type of environmental reactivity is super handy as temperatures can be magnified inside enclosures and this helps foster optimal growing conditions, which provides real peace of mind.

Buy WaterMate Pro Here!

Challenges That Automatic Watering Solves

  • Inconsistent watering schedules due to manual watering
  • Humid indoor conditions
  • Plant stress cycles due to overwatering or underwatering
  • Fungal diseases, root rot, wilting, mildew, etc
  • Eliminates water run-off and water loss through evaporation
  • Saves energy costs by reducing consumption
  • Frees up time and manual effort

The Benefits of Automated Watering for Indoor Growing

Automatic plant watering systems, when used indoors, provide several benefits, including optimal utilisation of resources and more control, which is essential for indoor growing environments. This includes consistency and precision, which are critical for the growth of high-value or delicate produce. It eliminates the need for constant oversight and removes the guesswork from watering schedules, leading to improved and predictable outcomes.

Here are some of the benefits of an indoor automatic watering system

  • Consistent watering schedules, adjusted according to changing weather
  • Prevent common watering mistakes and minimise human error
  • Optimises resources and reduces water wastage and energy consumption
  • Maintains healthy growing conditions for improved yields
  • Makes indoor growing systems more reliable and stable
  • Reduced plant stress cycles lead to healthier, thriving plants
  • Protects your back from lugging all the watering cans
  • Saves huge amounts of time verses manual watering

Why Upgrade to Automatic Watering?

Maintaining optimal growing conditions indoors can be challenging, but it doesn’t have to be. With Harvst’s automatic plant watering systems indoors, you can look forward to consistent growth and improved yields. This is because the system eliminates watering issues such as overwatering or underwatering that can be damaging to plant health.

Additionally, since the system directly provides water to the root zone, you ensure a continuous nutrient flow, helping strengthen their root systems. This enables stronger plant growth, ensuring fruit and vegetable crops benefit from the nutrient uptake, which helps improve yields and crop quality significantly.

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

Which Indoor Growers Use WaterMate?

Whether you’re new to allotment gardening or managing a larger, off-grid plot, WaterMate makes irrigation simple and reliable. Here are some of the people that will benefit from our automatic system:

  • Growers who own mini-greenhouses
  • Individuals with compact indoor gardens
  • People using hydroponic or soil-based systems
  • Those with polytunnels, small grow rooms or indoor reservoirs
  • Busy gardeners who are away from home

Typical WaterMate Users

  • People growing small kitchen herb gardens
  • Allotment holders using cold frames
  • Greenhouse owners
  • Gardeners who are looking to grow diverse crops, have multiple watering zones or have different plant needs
  • Those who work with different planting methods, like companion planting

WaterMate Models & Kit Options for Every Indoor Setup

From compact raised beds to full-size allotments, there’s a WaterMate kit to suit your setup. Each irrigation system for allotment comes with clear, step-by-step instructions, with all the parts needed to start watering automatically.

Our range is designed to match different growing areas, crop types, and power sources, making it simple to find the right fit for your plot.

  • WaterMate Mini

    Dual zone | Up to 6 m²

    Perfect for raised beds, cold frames, and compact growing areas. WaterMate Mini delivers precise allotment irrigation and supports up to 40 drippers or 12 sprayers.

    Buy WaterMate Mini 

  • WaterMate Pro

    Expandable Multi-Zone | Up to 6 zones

    Built for growers managing multiple beds or wider planting areas. The pro version offers greater pumping capacity (up to 35psi) and has an extended reach. It is ideal for allotments with diverse crops spread across a larger plot. This model covers 20m2 per zone and supports up to 120 drippers or 40 spray points.

    Buy WaterMate Pro 

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

Off-Grid and Solar Power Use in Allotments

No mains access to your indoor growing set up? WaterMate solar kit keeps your allotment watering system running steadily without electrical connection. 

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 150 litres. Additional solar panels can be added for shady locations, or connected to mains power where available.

Even in changing weather conditions, your plants receive the care they need without extra effort and planning.

Benefits of a Solar-Powered Irrigation System:

  • Operates reliably even in cloudy conditions
  • Charges efficiently using a 10W solar panel
  • Ideal for off-grid allotment plots without power access

FAQs

Can I use my water butt as the water supply?

Yes. WaterMate connects directly to tanks, barrels, or other stored water sources, helping you make the most of collected rainwater.

Can it connect to a water tank?

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

Do I need WiFi?

WaterMate is 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.

How long does installation take?

At Harvst, all our components and systems are designed to be easy, durable and sustainable, making DIY installations a breeze and don’t require any professional installation services. Most users have their system up and running in the 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.

Can an indoor watering system be customised for different plants or planting methods?

Harvst’s WaterMate range is a flexible and highly modular system that can be customised for different plants and growing schemes. You can add or rearrange components to suit your indoor growing area.

Will an indoor plant irrigation system help reduce energy costs?

Indoor plant irrigation systems like Harvst’s WaterMate come equipped with solar panels, reducing reliance on power mains, thus reducing energy bills.

Automate Your Indoor Watering With WaterMate

Harvst’s WaterMate is a powerful indoor automatic watering system that’s scalable, easy to install, conserves water and reduces energy costs. For busy gardeners, our smart irrigation system provides you with a seamless system that ensures precise and consistent watering while boosting plant health and yield.

We’re on a mission to make gardening simpler and take the guesswork out of watering schedules to free up your time for the things that truly matter. With WaterMate, you never have to worry about your plant’s health while you’re away, as you can remotely control the entire indoor irrigation system from a simple app. 

Plus, with consistent watering based on real-time sensor data, your plants receive all the benefits of an automatic plant watering system indoors, ensuring they grow and thrive with minimal fuss.

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