Put in a garden for a neighbour or friend. I've discovered that some folks would love a veggie garden but are daunted by the time it takes to get one started. You can use recycled timber or stones to build raised beds, dig a square foot garden, put in a row of corn/beans/squash, or just set them up with a tomato plant in a pot or some kitchen herbs. Once the first hurdle is crossed, most will find the rest of them easier to get over. Encourage pass it forward and soon you'll have a neighbourhood of growers.