A drop from 90s-degree heat to lows around minus 5 Celsius has ruined one peach variety at Apple Hill Orchards in Ohio, one of the first concrete crop losses from the Northeast's April weather whiplash.

Owner Anne Joudrey, who runs the operation's roughly 80 acres (32 hectares) in Mansfield and 110 acres (45 hectares) in Fredericktown, said the warm first half of April pushed peach and apple trees into early bloom. Then thermometers fell into the low 20s Fahrenheit (around minus 5 Celsius), killing one peach variety outright.

"Farming is farming, and you never know what you're gonna get, but we had a pretty good bloom, so we were expecting a pretty good crop," Joudrey said Monday, April 20.

Her apples were holding on, helped by trees planted on high ground where cold air drains away. "We should fare pretty well, hopefully," she said. "But you never know."

The temperature swing was extreme even by regional standards. Boston hit the high 70s Fahrenheit (around 26 Celsius) last week, while New York, Philadelphia and Washington, D.C. reached the 90s (around 32 Celsius), according to the National Weather Service. By the weekend, readings across the region had fallen into the 50s (around 10 Celsius), with snow showers in parts of New England. The National Weather Service then issued a freeze warning for Monday night and Tuesday morning covering parts of Ohio, Pennsylvania, Virginia, Maryland and North Carolina.

Frost this late is normal. The average date of the last frost across the Northeast ranges from mid-April to early June, according to the Northeast Regional Climate Center at Cornell University. What changes the field calculation is the sequence: unusual early-April warmth pushed buds and blooms out ahead of schedule, exposing them to a rapid, hard freeze.

Cut-flower growers face a different version of the same problem. At Understory Farm in Bridport, Vermont, owner Gregory Witscher said tulips targeted for Mother's Day in mid-May have already bloomed in the greenhouses.

"That just means that we have to harvest them all at the same time," he said. "We have to harvest them and store them with the bulbs on in crates in a walk-in cooler for longer."

Witscher grows about 50 flower varieties for wholesale markets. Weather swings demand flexibility, he said, and small vegetable and flower farms increasingly hold row covers, heaters and shade cloth as standard kit.

"With the hot weather and then the cold weather, I think it's intense, and it makes things challenging," Witscher said. "The longer I do this, the more I want to have as many options as possible and have a lot of tools and resources available to be extremely nimble."

For growers across the region, the practical stakes are straightforward: early budbreak plus a freeze warning equals risk to stone fruit and tender blooms, while flower producers must compress harvest and stretch cooler storage to hold a market window. With the regional last-frost window running to early June, further freeze warnings remain a live risk for anything already in bloom.