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Growth Characteristics of Common Milkweed

Published online by Cambridge University Press:  12 June 2017

Larry S. Jeffery  and
Laren R. Robison
Larry S. Jeffery
Affiliation:
Formerly Department of Agronomy, University of Nebraska, Lincoln, Nebraska; now Department of Agronomy, University of Tennessee, Knoxville, Tennessee
Laren R. Robison
Affiliation:
Department of Agronomy, University of Nebraska, Lincoln, Nebraska
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Abstract

Seed dormancy of common milkweed (Asclepias syriaca L.) is broken by a few days of moist low-temperature after-ripening. The duration of low-temperature after-ripening of the seeds is temperature dependent. Seedling emergence is best when the seeds are planted 1 to 2 cm deep and extremely limited when planted 6 cm deep. Seedlings have the capacity to produce new shoots if clipped in the 1 to 1¾-leaf pair stage and multiple shoots if clipped in the 2 to 2½-leaf pair stage. All seedlings reaching the 4 to 4½-leaf pair stage before clipping produced new shoots.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 3 , May 1971 , pp. 193 - 196
Copyright
Copyright © Weed Science Society of America 

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References

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