Growing Degree Day (GDD) Summary, April 2022

Here is your Growing Degree Day (GDD) summary ending April 30, 2022. While the calendar says it is spring, our actual outdoor experiences made have said otherwise. We have enjoyed some record breaking summer-like temperatures, but on the flip slide, snow flakes were still flying in April. Hopefully now that it is officially May, things will change - who are we kidding, it is Ohio.

Stay tuned for these year-to-date summaries each month in 2022. 

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

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

...Bradford Callery Pear, Pyrus calleryana, full bloom, 164; Allegheny Serviceberry, Amelanchier laevis, full bloom, 169; Saucer magnolia, Magnolia x soulangiana, full bloom, 174; PJM Rhododendron, Rhododendron PJM, full bloom, 178; Weeping Higan Cherry, Prunus subhirtella, full bloom, 179; Boxwood Psyllid, Psylla negudinis, egg hatch, 179; Apple Serviceberry, Amelanchier x grandiflora, full bloom 182; Common Chokecherry - Prunus virginiana, first bloom, 182; Koreanspice Viburnum, Viburnum carlesii, first bloom, 185; Regent Serviceberry, Amelanchier alnifolia,first bloom, 186; Japanese Flowering Crab, Malus floribunda, first bloom, 189; White/Green Ash - Fraxinus americana, first bloom, 190; Eastern Redbud, Cercis canadensis, first bloom, 191; Spongy moth (formally gypsy moth), Lymantria dispar, egg hatch, 192; Donald Wyman Crabapple, Malus angustifolia, first bloom, 197; Snowdrift Crabapple, Malus x snowdrift, first bloom, 198; Compact Garland Spirea, Spirea x arguta, full bloom, 205; Koreanspice Viburnum, Viburnum carlesii, full bloom, 205; Azalea Lace Bug, Stephanitis pyrioides, egg hatch, 206; Spring Snow Crabapple, Malus x spring snow, full bloom, 209; Viburnum Leaf Beetle, Pyrrhalta viburni, first egg, hatch, 210; Large Crabgrass, Digitaria sanguinalis, first seedling emergence, 211; Carolina Silverbell, Halesia carolina, first bloom, 213; Common Flowering Quince, Chaenomeles speciosa, full bloom, 214; Birch Leafminer, Fenusa pusilla, adult emergence,  215; Coral Burst Crabapple, Malus coralcole, first bloom, 217; Regent Serviceberry, Amelanchier alnifolia, full bloom, 219; Elm Leafminer, Fenusa ulmi, adult emergence, 219; Common Chokecherry, Prunus virginiana, full bloom, 221; Alder Leafminer, Fenus dohrnii, adult emergence, 224; Honeylocust Spider Mite, Platytetranychus multidigituli, egg hatch, 227; Wayfaringtree Viburnum, Viburnum lantana, first bloom, 229; Honeylocust Plant Bug, Blepharidopterus chlorionis, egg hatch, 230; Sargent Crabapple, Malus sargentii, first bloom, 230; Tatarian Honeysuckle, Lonicera tatarica, first bloom, 233; Common Lilac, Syringa vulgaris, first bloom, 234; Persian Lilac, Syringa x persica, first bloom, 240; White/Green Ash, Fraxinus americana, full bloom, 240; Ohio Buckeye, Aesculus glabra, first bloom, 245; Eastern Redbud, Cercis canadensis, full bloom, 245; Snowdrift Crabapple, Malus x snowdrift, full bloom, 250; Donald Wyman Crabapple, Malus angustifolia, full bloom, 251; Common Horsechestnut, Aesculus hippocastanum, first bloom, 251; Hawthorn Lace Bug; Corythucha cydoniae, adult emergence, 253;Japanese Flowering Crab, Malus floribunda, full bloom, 254; Hawthorn Leafminer, Profenusa canadensis, adult emergence, 260; Flowering Dogwood, Cornus florida, first bloom, 263; Coral Burst Crabapple, Malus coralcole, full bloom, 263; Smooth Crabgrass, Digitaria ischaemum, 25% seedling emergence, 263; Dwarf Fothergilla, Fothergilla gardenii, first bloom, 265; Red Buckeye, Aesculus pavia, first bloom, 265; Carolina Silverbell, Halesia carolina, full bloom, 266; Japanese Kerria, Kerria japonica, first bloom, 268; Blackhaw Viburnum, Viburnum prunifolium, first bloom, 269; Imported Willow Leaf Beetle, Plagiodera versicolora, adult emergence, 274; Red Chokeberry, Aronia arbutifolia, first bloom, 281; Wayfaringtree Viburnum, Viburnum lantana, full bloom, 290; Sargent Crabapple, Malus sargentii, full bloom, 298; Persian Lilac, Syringa x persica, full bloom, 303; Red Horsechestnut, Aesculus x carnea, first bloom, 304; Umbrella Magnolia, Magnolia tripetala, first bloom, 304; Pine Needle Scale, Chionaspis pinifoliae, egg hatch - 1st generation, 305; Cooley Spruce Gall Adelgid, Adelges cooleyi, egg hatch, 308; Eastern Spruce Gall Adelgid, Adelges abietis, egg hatch, 308; Vanhoutte Spirea, Spiraea x vanhouttei, first bloom, 309; Common Lilac, Syringa vulgaris, full bloom, 315; Pink Princess Weigela; Weigela florida, first bloom, 316; Blackhaw Viburnum, Viburnum prunifolium, full bloom, 322; Redosier Dogwood, Cornus sericea, first bloom, 323; Dwarf Fothergilla, Fothergilla gardenii, full bloom, 325; Winter King Hawthorn, Crataegus virdis, first bloom, 328; Lilac Borer, Podosesia syringae, adult emergence, 330; Slender Deutzia, Deutzia gracilis, first bloom, 338; Japanese Kerria, Kerria japonica, full bloom, 342; Common Horsechestnut, Aesculus hippocastanum, full bloom, 344; Red Chokeberry, Aronia arbutifolia, full bloom, 351; Doublefile Viburnum, Viburnum plicatum, first bloom, 353...

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.