26 degrees after petal fall is too cold
I keep sifting through the ruins of my flower cemetery hoping to find flowers without the tell-tail brown of a frozen ovule and I've found an occasional one amongst the peaches, plums, pears, apples and cherries (forget the cots, they turned brown through and through and dropped off the trees). Probably not enough salvageable to even justify spray at this point.
I thought it had only gotten down to 28 based on my own thermometer but the reading in town was apparently 26 last Sat morning. I'm usually at least as cold as them- whereever the reading is taken that gets posted by accuweather.
First time ever the prognosis is so bleak- by far. I always get pears and apples, at least. One extreme cold winter wiped out all the stone fruit but spring frost has never been this destructive on them either in over 20 years.
Weirdly, there still seems to be many healthy blossoms on the 2 paw paws and they've been frosted out in the past a few times. The blueberries appear unaffected entirely.
It will be a very lean year around here for plum curculio and squirrels. Always a bright side. Also, I'll be able to filch some fruit from clients better located. The majority of them are and most are showing beautiful set of all species.
As to the question,"is growing fruit trees worth it" I'd say,"not this year". I think you probably need to get significant harvests 2 of 3 years. I only hope the weather hasn't gotten too erratic for that on my own site. Seems to have been a very wild 3 years.