An Important Pruning Reminder
Mario Miranda Sazo, Cultural Practices
Lake Ontario Fruit Program
Cold hardiness is the ability of a plant to withstand low temperatures. Low temperature injury after a pruning cut can vary depending on when the low temperatures occurs (early vs. mid- or late-winter), how fast the temperature drops after the pruning cut, what the temperatures are the few days before and within 10-14 days after the pruning event, and how long the low temperatures are sustained in the orchard. Young trees are more sensitive to cold snaps after pruning than older trees. For those of you who produce fresh fruit we recommend you start pruning your older trees and the most resistant cultivars to winter damage first. The most resistant cultivars like McIntosh should be pruned now leaving the more sensitive cultivars until after January 1. Do not start your pruning of Empire, Red Delicious, Golden Delicious, Jonagold, and Mutsu at this time of the year just because you have the time and/or available labor force. Cutting done at this time (particularly making large chainsaw cuts) can predispose trees to winter injury if temperatures drop rapidly in the next couple of weeks. Hold off all pruning of most sensitive cultivars until trees have time to harden off under more cold weather. The more sensitive apple cultivars to winter damage after a pruning cut are: Golden Delicious, Red Delicious (more sensitive), Empire (more sensitive), Jonagold, and Mutsu. The apple cultivars with an intermediate susceptibility to winter damage after a pruning cut are: Paula Red, Cortland, Gala, Idared, and Greenings. The apple cultivars with less sensitive to winter damage after a pruning cut are: Honeycrisp and McIntosh (all strains).
Managing Crop Load of Apple Orchards by Pruning (pdf; 265KB)
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Upcoming Events
2026 Tree Fruit & Small Fruit Twilight Meetings
April 30, 2026 : Tree Fruit & Small Fruit Twilight Meeting 1
Webster, NY
The Twilight Meetings are a series of monthly meetings, where we examine seasonal changes in tree fruit and berry crop phenology, discuss and demonstrate scouting and monitoring for insects and diseases, and provide integrated pest management solutions to maximize the health and productivity of berry and tree fruit plantings.
Please arrive at 6pm for pizza and soda. This year Twilight meetings will begin and end 30minutes earlier than last year!
May 28, 2026 : Tree Fruit & Small Fruit Twilight Meeting 2
Oswego, NY
The Twilight Meetings are a series of monthly meetings, where we examine seasonal changes in tree fruit and berry crop phenology, discuss and demonstrate scouting and monitoring for insects and diseases, and provide integrated pest management solutions to maximize the health and productivity of berry and tree fruit plantings.
Please arrive at 6pm for pizza and soda. This year Twilight meetings will begin and end 30minutes earlier than last year!
June 25, 2026 : Tree Fruit & Small Fruit Twilight Meeting 3
Medina, NY
The Twilight Meetings are a series of monthly meetings, where we examine seasonal changes in tree fruit and berry crop phenology, discuss and demonstrate scouting and monitoring for insects and diseases, and provide integrated pest management solutions to maximize the health and productivity of berry and tree fruit plantings.
Please arrive at 6pm for pizza and soda. This year Twilight meetings will begin and end 30minutes earlier than last year!
2026 Virtual Orchard Meetup Series
February 27, 2026 : Session 1 - The Impacts of Weather on Pome Fruit Quality and Storability: Lessons Learned
The Impacts of Weather on Pome Fruit Quality and Storability: Lessons from 2025 - The first meetup will be conducted live on Friday, February 27, 2026, at 10:30pm (PST)/1:30pm (EST). The webinar will last 90 minutes. The format will include brief presentations by two SPARC scientists, followed by a packer/grower panel of industry leaders across North America. The meetup will conclude with an open discussion in a very inclusive virtual format. Viewers are invited to share solutions, ask questions, and interact with scientists and panelists. The program is free of charge.
June 11, 2026 : Session 2
Details to follow.
June 18, 2026
Details to follow.
June 25, 2026 : Session 4
Details to follow.
Cornell Fruit Field Day
July 30, 2026
Geneva, NY
Join Cornell researchers in Geneva for Fruit Field Day, returning after 10 years, to tour research plots, learn from experts—including Dr. Terence Robinson with 40+ years in tree fruit research—and explore the latest orchard technologies and practices.