GDD Maps Explained:

Degree days are a means by which turf and weed development can be monitored.

Degree Day Accumulation

Degree Day Comparisons

GDD For Seedhead Development: Base 32°F growing degree day accumulation is an experimental measure for predicting ideal annual bluegrass seedhead development and potential assessment with plant growth regulators. Preliminary data suggests that the ideal application time might be from 400-600 GDD for proxy and 500 to 650 GDD for embark.

Dandelion Control Recommendations