Most Eastern Iowa trees need 800 or more “chill hours” between 32 and 45 degrees to break dormancy. Days when the temperature is below 32 degrees, like it was in early January, don’t count toward the total. Neither do days when nighttime temperatures are above 45 degrees.
One Year After the Derecho, Only A Small Fraction of Destroyed Trees Replaced tspr.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from tspr.org Daily Mail and Mail on Sunday newspapers.
Last year’s powerful derecho devastated generations-old forests in a matter of minutes, downing millions of trees across Iowa. One year later, only a small fraction of the trees have been replanted and some Iowans are still grieving the loss.