Winter watering is vital to prevent root damage and “winter kill,” especially during dry, snowless periods. Plants may appear dormant, but their roots remain active and need moisture to survive.
Apply 10 gallons per inch of trunk diameter
When to Water
Temperature: Only water when air and soil temperatures are above 40°F.
Time of Day: Water at midday so the moisture has time to soak into the soil before freezing at night.
Conditions: The ground must be thawed and free of snow cover.
Frequency: Aim for 1–2 times per month from October through March if there has been no significant precipitation for 2–3 weeks.
Priority Plants
Newly Planted: Trees, shrubs, and perennials planted within the last 1–3 years have limited root systems and are the most vulnerable.
Evergreens: These plants continue to lose moisture through their needles all winter.
Exposed Areas: Plants on south or west-facing slopes or near reflective walls dry out faster.