How warm winters affect plants in Colorado
If this past winter felt unusually mild, you are not imagining it. Across Colorado, including here in and around Boulder, warmer temperatures and low snowfall have created a very different start to the growing season. While it might feel like a head start on spring, the reality on the ground tells a more complicated story.
From a landscape perspective, this kind of winter creates challenges that require early and thoughtful intervention.
Early Growth Comes With Risks
We are already seeing spring bulbs emerge well ahead of schedule. Tulips, daffodils, and other early bloomers are popping up weeks earlier than expected. According to industry experts, this early growth pushes plants into an active phase before conditions are reliably stable.
That means plants are using energy sooner and require water sooner. Without support, they can become stunted or weakened as the season progresses.
Dry Conditions Are the Bigger Concern
The more significant issue is not just the warmth, but the lack of moisture. With below-average snowfall, soils are entering spring drier than they should be. Add in persistent winter winds, and plants begin the season already under stress.
This affects everything from perennials to turf to larger landscape features. In our experience designing and maintaining landscapes in the Boulder area, dry soil at the start of the season often leads to uneven growth and increased maintenance needs later on.
Early Watering Becomes Essential
One of the biggest shifts this year is timing. Homeowners are often hesitant to begin watering too early due to the possibility of a late-season freeze. However, experts are clear that delaying irrigation can cause more harm than good.
Plants that emerge early without adequate moisture are more likely to struggle long term. Even with the risk of a spring cold snap, safely providing water now helps reduce overall stress and supports healthier development.
Trees and Shrubs Need Attention Too
It is not just flowers that are affected. Trees and shrubs, particularly those planted within the last couple of years, are especially vulnerable. Younger root systems cannot access deeper moisture, making them more dependent on surface watering.
In a typical year, snowpack helps sustain these plants. Some years, that natural buffer simply is not there.
An Overlooked Impact on Pollinators
Warmer conditions are also prompting pollinators to emerge earlier than usual. The challenge is that water sources and flowering plants are not yet fully available to support them.
For those of us who design landscapes with ecological balance in mind, like we do at Boulder Landscape & Design, this is an important reminder. Supporting pollinators early in the season can make a meaningful difference in maintaining a healthy garden ecosystem.
What This Means for Your Landscape
While a mild winter might sound appealing, there is little benefit for plant health. As many experts have noted, the focus this season is on mitigation rather than advantage.
This is a year to be proactive. Early watering, monitoring plant stress, and paying close attention to newer plantings will go a long way in protecting your landscape investment.
If you are unsure where to start, a tailored plan can help your garden not only survive this unusual season but continue to thrive in the months ahead. Our team of experts at Boulder Landscape & Design are here to help ensure your plants are set up for success in Colorado’s changing climate.
Ready to speak with a professional about creating a yard that will thrive and pollinators will love? Please fill out our Start Your Project form so we can learn more about your goals!
