Print both parts
Add two nails 50mm long and 3mm diam..
You have a soil mositure sensor you can use to determine if your plant needs watering.
see the link below from gardenbot that tells you how to hook it up to an arduino.
http://gardenbot.org/howTo/soilMoisture/
Soil_Sensor.skp | 45.7KB | |
Soil_Sensor.stl | 127.1KB |