02/05/2026
This winter’s unusually dry and warm temperatures have been noticeable. With milder days, fewer frosts, and less rainfall, early signs of spring are visible in many gardens. I wanted to share some observations about how this warm winter weather affects trees and what we might expect in the weeks ahead.
Warm winters can interrupt normal plant dormancy. Many deciduous trees and shrubs need consistent cold to complete chilling requirements that trigger uniform budbreak and flowering. When those chill hours are lacking, plants may break dormancy unevenly, producing weak or delayed blooms and reduced fruit set.
Warmer conditions also encourage earlier leaf-out and new growth, which can make plants more vulnerable to late frosts. Young shoots and buds that emerge prematurely are tender and can suffer dieback after sudden cold events, reducing vigor for the season.
On the positive side, evergreen plants suffer less winter desiccation and cold injury in milder winters, and extended mild periods can reduce winter stress for some species. However, inconsistent winter conditions—warm stretches interspersed with late freezes—often do more harm than steady, colder winters.
A few practical steps can help:
• Delay pruning until late spring to avoid stimulating premature growth.
• Protect plants by wrapping trucks with frost cloth or temporary covers when cold nights are forecast to prevent cracking.
• Apply 2–3 inches of mulch (keeping it a few inches from the trunk) to moderate soil temperature and retain moisture.
• Monitor for early pest activity and consider timely, targeted controls (physical or biological) before problems escalate.
• Typically, supplemental irrigation does not need to start until April, but if the tree starts to leaf out prematurely, an earlier start to irrigation may be necessary.