I just took a look at the summary of the Garden Writers Association 2009 Summer Gardening Trends Research Report, and an interesting common theme popped out. It appears that a growing concern about water conservation is fueling multiple trends. One third of consumers surveyed reported that they plan to use more mulch. One half plan to use drip irrigation or drought tolerant plants. And one of the top reasons given for the popularity in container gardening was ease of watering.
Clearly, water conservation is a key point to focus on in both your product mix and marketing materials during the coming year.