Freebase(0.00 / 0 votes)Rate this definition: Chemical property. A chemical property is any of a material's properties that becomes evident during a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity.
Ground Temperature. The best time to plant your corn seeds is when the soil temperature reaches an average of 50 degrees Fahrenheit. You can determine the average ground temperature in your garden using a soil thermometer -- available at most garden stores.
Heirloom corn hates the cold. There are a few corn varieties that you can put in the soil when its below 65 degrees, but not many. If you want to get a jump start on corn then plant in the greenhouse and transplant corn to the garden later when ALL DANGER OF FROST IS PAST.