fbpx Plant Health Care Report issue 2019-2 | The Morton Arboretum

Plant Health Care Report issue 2019-2

April 19, 2019

The scouting report of The Morton Arboretum for April 19, 2019.


PDF iconPlant Health Care Report issue 2 for 2019 (PDF)


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What indicator plant is in bloom at the Arboretum?
Corneliancherry dogwood (Cornus mas) is in flower

Accumulated Growing Degree Days (Base 50): 40.5 (as of April 18)
Accumulated Growing Degree Days (Base 30): 592 (as of April 18)


Insects/other pests

  • Hemlock needleminer
  • Boxwood leafminer
  • Boxwood psyllid



  • Volutella blight on pachysandra.
  • Black knot



  • Ficaria verna, a weed of many names



  • A little thought about growing degree days
  • Crabgrass preventer update



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