Our Guide to the Best Soil Moisture Meters Under $50

The display shows soil moisture, temperature, light level and a real-time clock together and flashes a low-moisture alert. A triple-probe TDR sensor with a waterproof, corrosion-resistant build stays in the soil for continuous monitoring, and wireless range reaches up to 328 feet, with up to 12 sensors on one display.

It gives the widest monitoring range in the group, at a price below the two-pack RAINPOINT. Against the 7-in-1 test kit, it monitors continuously instead of giving a one-time check.

Choose it for a large collection of houseplants, balcony pots and beds. For one plant, a cheaper sensor is plenty.

Each meter detects soil moisture every three minutes and shows it on an LCD, with a manual check available. Capacitive probes avoid the rust that harms resistive ones, and the IPX5 body shrugs off rain. The pack includes two meters, pH test strips and a screwdriver, and a WiFi hub is needed for remote use.

It is the most expensive option and costs less per sensor than buying two singles. Against the EDGEVEIL, it offers capacitive probes but fewer sensors per display.

Choose it for two plants you cannot afford to lose. For a big collection, the EDGEVEIL display scales further.

The kit combines a soil meter with an LCD that shows soil and air temperature and humidity, and monitors moisture, pH, fertility and sunlight. Metal probes are corrosion-resistant, and the maker says it suits beginners who want a broad picture of soil conditions.

It is not suited to sandy or loose soils or rocky ground, according to its tips, and it is a spot-check tool, not a leave-in sensor. Against the EDGEVEIL, it covers more parameters but only at the moment of testing.

Choose it if you want a broad screening of garden soil. For continuous watering data, a leave-in sensor is better.

Two meters each carry a long single probe with a large dial of three zones across ten steps. The reading is instant, no battery is needed, and the single probe is gentler on roots than twin probes.

It costs less than all the other options and gives no continuous data or display. Against the Sustee sticks, you get numeric dial zones instead of a color indicator.

Pick it for simple manual checks. For leave-in monitoring, choose the Sustee or a wireless sensor.

Each 4.7 inch stick stays in the soil and shows white when the plant needs water and blue after watering. It is made in Japan with Tokyo University of Agriculture, has a refillable core and is intended for 2 to 3 inch pots, with each core lasting roughly six to nine months.

It suits small succulents and soils that hold water well. Against the Relaxweex ceramic stakes in the same range, it offers a replaceable core and a documented lifespan.

Choose it for small pots in water-retentive soil. For larger pots, use the XLUX dials.

Terracotta stakes show soil hydration through color: dark when watered, fading as the soil dries. The six bee, ladybug and snail designs are 5 to 6 inches tall, need no batteries and work around the clock once inserted.

They cost more than the Sustee set but give two extra stakes and a decorative look. The Sustee gives a documented core life, which the Relaxweex does not.

Pick them as a gift or for desk plants. For documented lifespan, use the Sustee.