Plant Phenology Reports

 

PLANT PHENOLOGY REPORT


Department of Horticulture
Oregon State University
Corvallis, Oregon

March 4, 2009


 

Phenospecies Date of 1st bloom Season deviation*
Single Snow Drop (Galanthus nivalis) 2- 8 -  6
Spriraea arguta 2-15 -28
Crocus chrsanthus 2-16 -14
Japanese quince (Chaenomeles lagenaria) 2-21 -  1
Red maple (Acer rubrum) 2-24 -  8
Yellow forsythia (Forsythia intermedia) 3-  1 -  8
Cornelian dogwood (Cornus mas) 3-  3 -  3


 


*-6 = 6 days later than average; +6 = 6 days early, etc.

Notes:

The spring season is cold, but not as cold as last year. The wide variation in bloom this year is partly due to temperature variation. Another possible cause of vaiation is that dark-colored buds are warmed more by periods of direct sun than those lighter colors. On cloudy, overcast days all buds will be the same temperature.

Mel Westwood
Professor Emeritus

Quote for the Month:

When you get to the end of your rope, tie a knot and hang on. F.D.R.
 

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