https://www.sparkfun.com/agxrp-pump-soil-moisture-sensor-expansion-pack-diy-beta.html
AgXRP Pump & Soil Moisture Sensor Expansion Pack - DIY - Beta - SparkFun Electronics
SparkFun Electronics is an online retail store that sells the bits and pieces to make your electronics projects possible.
soil moisture sensorpumpexpansionpackdiy
https://www.adafruit.com/product/4026
Adafruit STEMMA Soil Sensor - I2C Capacitive Moisture Sensor [JST PH 2mm] : Adafruit Industries,...
Most low cost soil sensors are resistive style, where there's two prongs and the sensor measures the conductivity between the two. These work OK at first, but...
adafruitstemmasoilsensori2c