The National Phenology Network

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The National Phenology Network www.npn.uwm.edu C
oordinator Dr. Mark Schwartz University of
Wisconsin Milwaukee mds_at_uwm.edu
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National Phenology Network Mission
Facilitate collection and dissemination of plant
phenological data across the US Support
research on interactions between plants and
lower atmosphere, and long-term impacts of
climate change.
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NPN Lilac Observations Syringa chinensis 'Red
Rothomagensis'
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• Lilac Phenological Observations
• First leaf
• 95 leaf
• First bloom
• Full bloom
• End bloom

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www.npn.uwm.edu
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Full Leaf
First Leaf
widest part of leaf past tips of brown bud scales
95 of buds open
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First Bloom
Full Bloom
at least 50 of flower clusters on the plant have
at least one open bud
at least 50 of flower clusters have all buds open
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End of Bloom
95 of flowers have withered or dried and floral
display has ended.