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Name: Paul C.
Status: educator
Age: 40s
Location: N/A
Country: N/A
Date: 12/10/2002

Why do apple seeds need to "winter" or "sleep" before they can germinate?

The following about the cold "stratification" period required for germination may be helpful:

Anthony Brach, Ph.D

This may help:

"Some seeds may be inhibited from germinating because of either physical or physiological dormancy. Physical dormancy usually takes the form of a seed coat that is so hard that water and oxygen cannot get through until the coat breaks down. These seeds benefit from being soaked or scratched lightly before planting. Morning glories and locust seeds are examples. Physiological dormancy results when the internal chemistry of the seed needs to be corrected by exposing the seed to proper temperatures. Seeds such as apple will not germinate unless exposed to cold temperatures for a period of time. Both of these adaptations prevent the seed from germinating until conditions are right for their survival."

J. Elliott

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