Do Evergreens Need Water in Winter?
Yes, during dry spells they often do. Evergreen needles continue losing moisture even when the landscape looks dormant.
Evergreens keep their foliage through winter, which means they can continue losing water through their needles while roots are dealing with cold, dry soil.
CSU Extension notes that most evergreens used in Colorado landscapes benefit from supplemental water during winter dry spells.
Winter drought can be easy to miss
Cold weather makes a yard look dormant, but Colorado's combination of dry air, bright sun, wind, and limited snow cover can pull moisture from plants for weeks at a time. Damage may not become obvious until later.
Water only when conditions are right
Use the same basic CSU winter-watering rule: choose a day when air and soil temperatures are above 40°F, the ground is not frozen, and snow cover is absent. Apply water slowly enough that it soaks into the root zone rather than running across frozen or compacted ground.
Pay attention to exposure
Evergreens on windy sites or south- and west-facing exposures can dry faster. Recently planted evergreens also deserve closer monitoring because their roots have not yet expanded through the surrounding soil.
Sources & further reading
These Field Notes translate Colorado horticultural guidance into practical homeowner language. For the underlying recommendations, start with the original CSU Extension resources: