The best plant water meters are a great tool for gardeners, informing them, at a glance, when the moisture levels in their plant's soil are getting low. Most consumer-level plant water meters — or hygrometers if you want to get fancy — work on a simple but effective probe and gauge system to visually show when moisture levels are low. We've rounded up a selection of the most popular plant water meters for indoor and outdoor use so that you can select the best system for you.
Sonkir 3-in-1 tester tool kit
Battery-free, comprehensive solution
This is a complete and comprehensive solution for gardeners to get an overall insight into the state of their plant's immediate surroundings. It can analyze not just the soil's moisture content but the ambient light and pH acidity levels, too. It's a dual probe option with a toggle switch to change between the three different settings.
Gouevn plant moisture meter
Affordable option for everyday use
This is a simple but effective solution that concentrates solely on the moisture level of your plant's soil, giving an easy-to-read, near-instant result on a 1 to 10 scale. It boasts a 7.7-inch probe length that's specifically designed to measure water at the root level. It doesn't need batteries and is lightweight and portable.
Vivosun 3-in-1 soil tester
Suitable for indoor and outdoor use
This dual-probe Vivosun tester can measure your soil's pH range, moisture, and light levels. The display shows pH on a 3.5 to 8 scale, moisture on a simple 1 to 10 level, and relative light on a scale of 0 to 2,000 lux. There's a switch on the unit's head to toggle between each setting.
XLUX T10 soil moisture meter
Easy-to-read display
This is another straightforward, battery-free solution that simply informs you of the current moisture level of any type of soil, whether that's directly on the ground or in a pot or hanging basket. It has a clear 1 to 10 scale display with a red needle to show current water levels. This option measures approximately 7 inches, so can tell you the state of the soil well beneath surface level.
Atree 3-in-1 soil tester kit
Get moisture results in 10 minutes
This soil tester kit from Atree is another easy-to-use, three-in-one option. You simply insert the dual probes in 4 to 6 inches of the soil you want to test, toggle to the setting you want the result for, wait 10 minutes, then see the result on the dial display. As with the other three-in-one solutions we've brought you, this measures light, moisture, and pH levels.
Ippinka Sustee plant moisture sensor
Two pack for your houseplants
We're bringing you one indoor solution if you need help with moisture levels for your houseplants. This twin-pack of sensor probes is suitable for use in plant pots with a diameter of between 4.7 and 7 inches. They have a simple color indicator to show you when the plants need watering, showing blue when the moisture levels are good and white when your plants need a drink.
AM Conservation Group MM071-F soil moisture meter
Cute frog-shaped design is ideal for kids
Our final choice is a child-friendly option that is a fantastic way to teach kids about gardening and horticulture. It has a very friendly, frog-shaped design in a bright green finish. This battery-free solution simply measures the moisture levels in soil, giving you a readout on an easy-to-understand scale from 1 to 10.
Get your measure
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These plant water meters will help you to discover the moisture level of your plant's soil. Our overall staff pick, the Sonkir 3-in-1 tester tool kit, will also inform you of the soil's acidity levels and how much light your plant is getting.
If you just want a simple moisture readout, consider the Gouevn plant moisture meter. This option has an easy-to-read 1 to 10 dial display and a long probe that will let you know what's going on below the soil's surface.
Anyone who is going on a growing adventure with little ones might want to look at the AM Conservation Group MM071-F soil moisture meter. This fun, frog-shaped plant water meter will let kids know when it's time to top-off the water levels of whatever they're growing.