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I'm always looking for easy ways to cross things off my daily to-do list. With the gazillion (yeah, I said it…gazillion) things we do daily, it's nice when we can automate something.
Fortunately watering your plants is now an automated option. A self-watering plant system (cool video), powered by an Arduino, is the set it and forget it time saver.

The difference water can make…Image Credit: ehow and mamypap.com
The instructions on building these self-watering systems are available on Instructables. It requires quite a bit of parts, and some mechanical/electrical knowledge (nothing you guys can't handle). Instructables offers step-by-step instructions and beautiful images to help you out. The hardest part would be programming the Arduino, but the website also gives you the exact code so you don't have to figure out the algorithm.
How it Works
The systems works with a set of sensors that detect when the soil is dry; based on a signal the system will water the plant accordingly. Depending on the type of plant and the conditions of the environment, the program can be adjusted to ensure the plant is getting the right amount of water.

Self-watering system. Image Credit: Instructables
The Catch
Unfortunately you do have to remember something, and that is to refill the water reservoir as needed. Even this task can be diminished by scaling this project to an aquaponics system. Aquaponics is the combination of aquaculture and hydroponics, aka you grow fish and plants together in one integrated, soilless system. I've seen a couple of aquaponics systems first hand and I think the concept is pretty brilliant. The plants grow above a tank of fish. The waste produced by the fish provides a food source for the plants and the plants filter the water for the fish. Because the system is relatively self-sustaining, quality crops can be grown on a year-round basis, anywhere in the world.
The self-watering device could be combined with this setup in order to design your own back-yard aquaponics system. Large scale, this could be a year-round garden. Small scale, you have a nice kitchen herb garden.
As a last note, for those who are not so programming savvy or just need a quick fix when going on vacation, I found instructions on how to make a self-watering system with a water bottle and a tray.
Resources
Arduino-powered plant can water itself, thank you very much
Grow Fish and Veggies Year 'Round
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