Variations of Pine Cone Production
We've lived in the mountains of CO for 16 years but
we have never seen so many pine cones on the ground as we have this
year. Several times as many as ever in the past.
Do they go through some stage every 20 years or so, or ??? These
are Ponderosa pines.
Why would there be so many pine cones this year?
Very likely a "mast year" for pine cones.
The following may be helpful:
Anthony R. Brach, Ph.D.
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Update: June 2012