Gardening technology can automate the watering of your garden and can even tell you when your plants need nutrients

When it comes to gardening, there are three kinds of people. First, there are those who have zero interest in getting their hands dirty. They wouldn't know a hosta from a hydrangea, and are happy with a house full of artificial plants.

Then there are the hard-core green thumbs. They start flowers and vegetables indoors in March. Their favourite channel is HGTV, and they listen avidly to radio call-in shows whenever gardening is the topic. Their idea of a perfect winter afternoon is hanging out in a garden centre greenhouse.