What Your Plants Are Telling You: Reading Sensor Data for Efficient Watering

At a Glance

Sensor-driven irrigation can replace guesswork with data-led decisions for healthier plant growth. It highlights temperature and humidity insights as early indicators of plant stress and environmental imbalance. Plant watering sensors are paving the way for tailored watering schedules that ensure precise watering for different types of growing spaces. The Harvst WaterMate is a smart irrigation system that combines technology and sustainability to help gardeners save time, money and effort.

Ready to reap the benefits of an automatic irrigation system and conserve resources? Purchase a WaterMate system today.

From Plant Stress to Smart Watering Solutions

Plants don’t talk, but they do communicate in subtle ways through tell-tale signs whether they’re receiving the nourishment they need. Putting aside the likes of Weevil larvae, if you notice your planters are weak at the roots, droopy, wilt prematurely or are constantly plagued with mildew or blight, it’s time to reconsider your watering methods.

For most gardeners and greenhouse owners, using manual watering methods is both time-consuming and labour-intensive. It’s also worth mentioning that temperatures can increase very quickly under glass or in a polytunnel and you can’t always be around quick enough to react to this. This may lead to inconsistent watering, which can cause plant stress and degrade crop quality. Thankfully, with smart irrigation systems and modern technology, you can address these challenges with ease and see your garden or allotment thrive.

One notable emerging technology is the use of plant watering sensors in gardening systems. These include temperature and humidity sensors that read real-time weather data, enabling automatic irrigation systems to provide precise watering.

In this article, we explore how to use sensor data to boost plant health while conserving water, saving time and energy.

How Temperature Sensors Reveal When Plants Are Under Water Stress

Gardening sensor technologies, such as temperature sensors, do more than just measure external weather conditions. Healthy plants have a self-regulating system that allows them to release water vapour through stomata to stay cool. When they’re watered sufficiently, leaves remain at a temperature lower than their surroundings.

Temperature sensors are designed to monitor spikes in ambient temperature or a narrowing of the gap between plant and air temperatures. When this happens, it indicates that the plant has stopped transpiring. This can be triggered by a dry root zone or by inconsistent watering schedules.

When water is scarce, tomato plants for example produce a waxy, waterproof layer (suberin) in their roots and close their leaf pores to prevent dehydration. This effectively "seals" the plant off, halting the suction of water and vital nutrients like calcium, which leads to permanently stunted fruit and disorders like blossom end rot.

An automatic irrigation system with built-in plant watering sensors helps track these changes and schedules watering at the precise time plants need it most. Consistent watering this way keeps the root zone hydrated, encouraging stronger plant development and growth.

Using Humidity Data to Fine-Tune Indoor Plant Watering Schedules

Seasoned gardeners understand the impact of humidity on plant health, especially if they’re growing in protected environments like a greenhouse or a polytunnel. Plants require less frequent watering in high-humidity environments because evaporation is minimal.

Low relative humidity, on the other hand, will encourage plants to pull moisture from the foliage and the root zone, necessitating frequent watering to prevent plant stress. You can do this by installing wireless humidity sensors and incorporating the data to schedule a tailored drip irrigation cycle or adjust sprayer durations.

This prevents you from making common watering mistakes, such as overwatering or underwatering, while creating watering schedules based on your plants' real-time needs. Humidity sensors are ideal in greenhouses or enclosed environments, which trap heat and moisture more readily, necessitating monitoring to maintain a steady growing environment.

Interpreting Sensor Fluctuations: What’s Normal vs. a Warning Sign

Just like humans have a circadian rhythm, your growing space has a diurnal rhythm. Understanding this is crucial to spotting early warning signs and maintaining an environment that is conducive to healthy plant growth.

For instance, during peak noon, sensor data will likely show a rise in temperature and a drop in humidity, which is completely normal. However, sudden temperature drops or sustained humidity may be cause for concern, as they could indicate a heating failure or stagnant air.

The Harvst WaterMate is a smart irrigation system that uses gardening sensors to adjust watering schedules according to the microclimate of your growing area. Whether you have a greenhouse, polytunnel or allotment, our WaterMate Pro and Mini models can provide you with a seamless gardening experience. Make a purchase today.

Combining Temperature and Humidity Insights for Efficient, Plant-Specific Watering

If you’re looking for ways to use sensor data to boost plant health, we highly recommend combining different types of gardening sensors. This lets you benefit from a tailored watering schedule, whether your gardening setup is simple or complex.

Here, it's important to understand Vapour Pressure Deficit (VPD), which plays a notable role in a plant’s transpiration process, often impacting photosynthesis and nutrient uptake. In simpler terms, it's a calculation that determines the difference between the current moisture level and the maximum moisture content your growing space can hold.

For instance, a low VPD would indicate less frequent watering, while a high VPD would indicate the need for more frequent watering. Using a combination of plant watering sensors ensures that smart irrigation systems read this data correctly and provide the right amount of water to boost growth and nutrient uptake.

By investing in a smart irrigation system and gardening sensors, you not only benefit from an innovative upgrade but also restore the joy of gardening and boost your mental well-being.

Purchase the Harvst WaterMate Today!

Plant watering sensors let you schedule watering based on each plant's actual needs rather than rigid schedules. Consistent, precise watering this way ensures plants develop strong roots, grow healthy, and produce abundant yields.

The Harvest WaterMate is an automatic irrigation system designed to fit seamlessly into your garden, greenhouse, or polytunnel and comes equipped with temperature sensors. WaterMate is available in Mini and Pro models to suit different growing areas.

With an easy DIY installation and remote control via a smartphone app, the system makes for a convenient upgrade while ensuring your plants benefit from tailored watering.

What’s more, you can purchase accessories and components to customise your setup or upgrade it to accommodate your plant’s growing needs. From greenhouse installation kits and sprayers to polytunnel kits and more, it allows you to build a DIY greenhouse your way.