Handout
University of Hamburg

University of Hamburg: Photoperiodism and Stimulation

For Students 9th - 10th
A good summary of the photoperiodic effects of plants. Discussion of the way that the length of the day effects the growth of plants.
Handout
NC State University

Horticulture Information Leaflets: Overcoming Seed Dormancy: Trees and Shrubs

For Students 9th - 10th
Good list of examples of how dormancy in tree seeds can be overcome. In the discussion, you'll pick up a fair amount about dormancy in plants.

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