Dorchester, Wisconsin. Dorchester is a village in Clark and Marathon counties in the U.S. state of Wisconsin, along the 45th parallel. It is part of the Wausau, Wisconsin Metropolitan Statistical Area. The population was 876 at the 2010 census. Of this, 871 were in Clark County, and only 5 were in Marathon County.
Petunias have a base temperature of about 39 degrees F and are considered cold tolerant; however, freezing temperatures can kill petunias because the plants' cells need the sun's energy for photosynthesis.nce petunias have endured frost or freeze injury, there is not much you can do to save the plant. At times, frost-injured plant parts can be cut back, and plants may outgrow the damage. Petunias can survive the light frost of southern climates, as petunias will come back in the spring following a hard freeze.
More freeze tips: 1  If freezes are forecast for several nights in a row, plants can stay covered with blankets or sheets for days without harm. 2  Where the leaves of tropical plants touch the plastic covers they will freeze. 3  To minimize leaf burn, you can lift the plastic cover to keep it off the foliage. 4  Be extra careful when using electric space ... If freezes are forecast for several nights in a row, plants can stay covered with blankets or sheets for days without harm. 2  But eventually the covers will need to be removed so the plants can get light. 3  Where the leaves of tropical plants touch the plastic covers they will freeze.