A thermo-hygrometer is an indispensable measuring device for every indoor grower. It reliably shows you the temperature and humidity in your grow tent – two decisive factors for healthy plant growth. With a precise hygrometer with thermometer, you stay in control of the climate at all times and can react in time if values fall outside the optimal range.
A thermo-hygrometer shows you temperature and humidity at a glance, so you know whether your climate is on track before your plants show it. This collection includes the Garden Highpro HygroThermo Basic, Medium, Premium and Pro, the MediPro with thermo-hygrometer, and Dutch Masters thermo-hygrometers with and without probe and in ECO versions. Models with an external sensor let you measure at canopy height while reading the display outside the tent; min/max memory shows you what happened overnight. Place the sensor in the shade at plant level, away from the lamp and fan. Use the readings to fine-tune your climate controllers and humidity equipment, and see all meters.


Questions & answers about Thermo-Hygrometers
All growing questions →- Climate What is the ideal temperature in a grow tent? About 22 to 28 °C with the lights on, and no more than about 5 °C cooler when they're off. Read the answer →
- Climate What is the ideal humidity in a grow tent at each stage? About 65 to 80% for seedlings and cuttings, 50 to 70% in growth, and 40 to 50% in flowering, a bit lower toward the end. Read the answer →
- Climate What is VPD and how do I use it in a grow tent? VPD (vapour pressure deficit) combines temperature and humidity into one number that tells you how strongly the air pulls water out of th... Read the answer →
- Climate Do I need a climate controller, or is a thermo-hygrometer enough? A thermo-hygrometer is enough to start with. A controller is worth it once you want fans, humidifier and heater to react on their own. Read the answer →
Why a Thermo-Hygrometer Is So Important in Indoor Growing
The right combination of temperature and humidity ensures optimal photosynthesis and strong plants. A hygrometer with thermometer helps you keep an eye on these values. The advantages:
Exact measurement: monitor temperature and humidity precisely. Optimal climate: make sure your plants always have the best conditions. Early warning: spot deviations in time and act immediately. Compact & simple: small design, easy to place in any grow tent.
Types of Thermo-Hygrometers
There are various types of thermo-hygrometers:
Analog models: simple, robust and durable. Digital models: with exact readouts and often extra functions such as min/max memory. Wireless & Wi-Fi hygrometers: allow monitoring even remotely.
For indoor growing, digital hygrometers with thermometer are especially popular, as they deliver precise values and are easy to read.
Buy Thermo-Hygrometers for Indoor Growing
A thermo-hygrometer is part of the basic equipment for every grow tent. It helps you monitor the climate optimally, securing the growth and health of your plants in the long term.











