A Passion. I discovered that I was a passionate gardener in 1992 when I was first introduced to the sport of giant pumpkin growing. Since then, I have written four books on giant pumpkins, and one on chrysanthemums, along with editing, designing, and publishing a two books on giant tomatoes.
Polytunnels. Polytunnels make gardening undercover affordable for many. You can get a much larger growing area for your money but you will have to replace the polythene every five to ten years, depending upon the gauge you buy and your location (some will be more exposed to weather conditions that others).