Test Gardens Track Seasons
How can a handful of tulip bulbs help us understand climate and seasons across the Northern Hemisphere?
Tracking Change with Tulips
Each fall, people across the Northern Hemisphere plant Red Emperor tulips to help monitor seasonal change in a scientific way. In the spring, when the plants emerge and bloom, gardeners report their data to the maps. One garden at a time, the relationship between climate, geography and the greening of spring is revealed.
- How to Participate: Step-by-Step Guide