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
2025 Apple Social
July 17, 2025 : Wayne County - Apple Social
Please join us at this casual networking event for all apple industry folks from Western NY, proudly sponsored by Valent. There will be a brief introduction of the Lake Ontario Fruit Program, and from attending specialists.
July 24, 2025 : Orleans County - Apple Social
Lyndonville, NY
Please join us at this casual networking event for all apple industry folks from Western NY, proudly sponsored by Valent. There will be a brief introduction of the Lake Ontario Fruit Program, and from attending specialists.
2025 Cornell In-Depth Fruit School Recordings
April 8, 2025
July 31, 2025
: Recording Available for 2025 Cornell In-Depth Fruit School
Access to the 2025 Cornell In-Depth Fruit School recordings are now available for purchase.
3rd Annual Western NY Fruit Growers Tour, Featuring Wayne County
July 31, 2025
Registration open!
We are excited to announce the 3rd annual Western New York Fruit Grower Tour, the premier fruit tour of the northeast brought to you by Cornell Cooperative Extension's Lake Ontario Fruit Program and Lake Ontario Ag Consulting, LLC! Located in Wayne County, this orchard field day will highlight new and existing products, chemistries, practices, technologies & equipment that shape the orchard industry today. The Western NY Fruit Grower Tour will again combine two past orchard tour events, the LOF Summer Fruit Tour and the Wayne County Fruit Grower Tour, giving industry members the opportunity to conveniently showcase their product offerings to ONE unified group at ONE time and place!
* Schedule subject to change.