In the past few months, we have covered plenty of cool smart gardens. If you know your sensors and electronics, you can build your own. Akin Yildiz has posted a guide that shows you how to build your own Darth Vader Smart Garden. You are going to need a soil sensor, NeoPixel LED, mini breadboard, power bank, and NodeMCU to get started.
This smart garden lets you know by e-mail when you need to water your plants. Its eyes also change color to grab your attention. More information is available on Kickstarter.