Gardening is a great hobby that has many benefits. If you're into technology there are more ways to combine these to pursuits. As things like computers, sensors, lighting etc. have become cheaper and the ability to connect them all easier having a high tech garden is not that difficult.
Here are a couple of interesting links about technology to the garden courtesy of Lifehacker and Make. At Make they posted a video about a robot that can maintain the garden. Never worry about forgetting to water again! I posted the video at my other site which is mostly news links and videos.