mature blueberry bushes flowering during this cold snap (in No Balt Co - Hereford zone)
I read that 25-deg F temps (which we have seen this week and predicted again for Sunday) can kill the flowers. What stage of growth is likely to be killed? Will early blooming varieties that have flowers developed already be lost for fruit? Do you have a resource for misters, etc. that might be used to protect ?
At 25 degrees fully open flowers will be damaged. Ones that are less open should not be. See the following link for more information about temperatures and damage. http://extension.psu.edu/plants/vegetable-fruit/news/2012/frost-protection-for-berries
You do not have to invest in a misting system. A garden sprinkler could be used. You could put floating row cover over your plants. It is difficult to do this without damaging the plants. http://www.nyshs.org/pdf/fq/2005-Volume-13/Vol-13-No-1/Growing-Blueberries-in-Cold-Climates.pdf vw