Growing Degree Day (GDD) Summary, March 2023

Here is your Growing Degree Day (GDD) summary ending March 31, 2023. This summary is a year-to-date summary and includes the months of January, February and March. Stay tuned for these year-to-date summaries each month in 2023. 

GDD Chart, March 31, 2023

GGD Species List (Common Name, Scientific Name, Phenological Event, GDD)

The list includes both plants and insects. Insects are bolded within the list. 

Silver Maple, Acer saccharinum, first bloom, 34; Corneliancherry Dogwood, Cornus mas, first bloom, 40; Silver Maple, Acer saccharinum, full floom, 42; Red Maple, Acer rubrum, first bloom, 44; Speckled Alder, Alnus incaca spp.rugosa, first bloom, 52; Northern Lights Forsythia, Forsythia x intermedia, first bloom, 58; Japanese Pieris, Pieris japonica, first bloom, 60; Red Maple, Acer rubrum, full bloom, 75; Star Magnolia, Magnolia stella, first bloom, 83; White Pine Weevil, Pissodes strobi, adult emergence, 84; Border Forsythia, Forsythia x intermedia, first bloom, 86; Eastern Tent Caterpillar, Malacosoma americanum, egg hatch, 92; Manchu Cherry, Prunus tomentosa, first bloom, 93; Northern Lights Forsythia, Forsythia x intermedia, full bloom, 94; Speckled Alder, Alnus incana spp. rugosa, full bloom, 97; Corneliancherry Dogwood, Cornus mas, full bloom, 98; Norway Maple, Acer plantanoides, first bloom,116; Border Forsythia, Forsythia x intermedia, full bloom, 116; Chanticleer Callery Pear, Pyrus calleryana, first bloom, 123; Sargent Cherry, Prunus sargentii, first bloom, 127; Larch Casebearer, Coleophora laricella, larval feeding begins, 128; Japanese Pieris, Pieris japonica, full bloom, 129; Saucer Magnolia, Magnolia x soulangeana, first bloom, 133; Black Stem Borer, Xylosandrus germanus, first adult emergence, 136; Common flowering quince, Chaenomeles speciosa, first bloom, 137; Bradford Callery Pear, Pyrus calleryana, first bloom, 142; European Sawfly, Neodiprion sertifer, egg hatch, 144; Weeping Higan Cherry, Prunus subhirtella, first bloom, 145; PJM Rhododendron, Rhododendron PJM, first bloom, 142; Norway Maple, Acer platanoides, full bloom, 149; Chanticleer Callery Pear, Pyrus calleryana, full bloom, 149; Inkberry Leafminer, Phytozyma agricola, adult emergence, 150; Star Magnolia, Magnolia stella, full bloom, 151; Sargent Cherry, Prunus sargentii, full bloom, 151; Allegheny Serviceberry, Amelanchier laevis, first bloom, 153; Spring Snow Crabapple, Malus x spring snow, first bloom, 155; Manchu Cherry, Prunus tomentosa, full bloom, 155; Smooth crabgrass, Digitaria ischaemum, first seedling emergence, 155; Apple Serviceberry, Amelanchier x grandiflora, first bloom, 159; Spruce Spider Mite, Oligonychus ununguis, egg hatch, 162; Bradford Callery Pear, Pyrus calleryana, full bloom, 164; Allegheny Serviceberry, Amelanchier laevis, full bloom, 169; Saucer Magnolia, Magnolia x soulangeana, full bloom, 174; PJM Rhododendron, Rhododendron PJM, full bloom, 178; Weeping Higan Cherry, Prunus subhirtella, full bloom, 179; Boxwood Psyllid, Cacopsylla buxi, egg hatch, 179; Apple Serviceberry, Amelanchier x grandiflora, full bloom, 182; Common Chokeberry, Prunus virginiana, first bloom, 182; Koreanspice Viburnum, Viburnum carlesii, first bloom, 185; Regent Serviceberry, Amelanchier alnifolia, first bloom, 189; Japanese Flowering Crabapple, Malus floribunda, first bloom, 189; White Ash, Fraxinus americana, first bloom, 190; Eastern Redbud, Cercis canadensis, first bloom, 191; Spongy Moth (formally Gyspy Moth), Lymantrai dispar, egg hatch, 192; Donald Wyman Crabapple, Maulus angustifolia, first bloom, 197; Snowdrift Crabapple, Malus x snowdrift, first bloom, 198; Spotted Lanternfly, Lycorma delicatula, egg hatch & first nymph (predicted), 200; Compact Garland Spirea, Spirea x arguta, full bloom, 205; Azalea Lace Bug, Stephanitis pyriodes, egg hatch, 206; Spring Snow Crabapple, Malus x spring snow, full bloom, 209; Viburnum Leaf Beetle, Pyrrhalta viburni, first egg hatch, 210 . . .

Now that you have read this summary, what is your GDD? Check out this link https://weather.cfaes.osu.edu/gdd/, type in your Ohio zip code, and see where your location is at in this biological calendar. You can also hit the summary tab and it will list the GDD accumilations for that zipcode for previous years as well - it is nice to see the history, and the average of those years.