The Arduino Plant Watering System is designed to automatically supply water to your plant's soil once its moisture level falls below a particular point.

It may not use water recycled from your air conditioner, but this compact self-watering solution is perfect for any size garden. It's extremely simple, too (apart from the Arduino, perhaps), and ...

There is a system called Aquaponics that attempts to control those variables. Aquaponics combines aquaculture (raising aquatic animals) with hydroponics (growing plants in water).

Here is a tested Arduino project that uses 3 sensor probes as water level indicator with 3 leds and one LCD display + a simple controller that turns on a motor when the water has reached the desired ...