The scouting report of The Morton Arboretum for April 5, 2019.
What indicator plant is in bloom at the Arboretum?
Vernal witch-hazel (Hamamelis vernalis) is in full flower
Accumulated Growing Degree Days (Base 50): .5 (as of April 4)
Accumulated Growing Degree Days (Base 30): 333 (as of April 4)
Using growing degree days
Timing use of fungicides
Viburnum leaf beetle
Egg masses and more