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How are plants affected by climate and the seasons? In this large experiment students across the Northern Hemisphere track the growth of the same plant as the season changes from winter to spring. They discover how temperatures, sunlight, geographic location, and other variables influence plant growth — and the full array of seasonal changes that take place in the springtime. These observations set the stage for a better understanding of the impact of a changing climate. (More...)

Track the Arrival of Spring (See Timeline)

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Background information about the tulip study.

News

  • November 12, 2009: Microclimate challenge/Find a global partner/Protect your garden from critters...and more

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Try This! Invite family and friends around the globe to plant their own tulip test gardens. Together we'll track the changing seasons and climate across the hemisphere.

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