Trees in Transition: Caring for Trees as Spring Arrives

As and April and May roll into Alberta, our neighbourhood trees begin one of the most important transitions of the year. Even when snow still lines the Bow River pathways and Chinook winds tease us with false spring, trees are quietly waking up. Understanding what’s happening above and below ground during this shoulder season can help homeowners protect, maintain, and even improve the health of the trees that make Alberta such a beautiful place to live.

Spring Starts Below the Surface

While branches may still look bare, tree activity begins underground. As soil temperatures slowly rise, roots become active, absorbing moisture and nutrients needed for spring growth. This is why early spring care matters. Compacted soil from winter foot traffic, snow storage, or heavy equipment can restrict oxygen and water movement. If you notice areas around your trees that are hard-packed or puddle during melt, gentle soil aeration later in spring can make a big difference.

Pruning: Timing Is Everything

Late winter to early spring is an excellent time to prune many tree species in Alberta. With leaves off, structure is easy to see, and pruning wounds close more efficiently once growth begins. Proper pruning removes dead, damaged, or crossing branches, improves air flow, and reduces the risk of storm damage later in the year.

That said, not all trees should be pruned at the same time. For example, elms require special timing, between Nov 1^st – March 31^st, to prevent the spread of Dutch elm disease. Hiring a certified arborist ensures pruning is done safely, and with the long-term health of the tree in mind.

Watch for Winter Damage

Alberta’s trees endure a lot over winter: freeze-thaw cycles, heavy snow loads, and drying winds. In early spring, watch for cracked branches, split trunks, or limbs that didn’t survive the cold. These hazards often aren’t obvious until snow melts. Addressing them early helps prevent property damage and keeps sidewalks, alleys, and yards safe.

One of the most common spring mistakes is waiting too long to water. Our dry climate means trees can be moisture-stressed even while snow is melting. Evergreens are especially vulnerable because they lose moisture through their needles year-round. If we have a dry April, deep watering during warm spells (when temperatures are above freezing) can prevent browning and needle loss later in the season.

 

Mulch: A Simple, Powerful Tool

Adding a fresh layer of mulch in spring is one of the best things you can do for your trees. Mulch helps retain moisture, moderates soil temperature, and reduces competition from grass and weeds. Keep mulch a few inches away from the trunk—mulch piled against bark can cause decay and pest problems.

Planting with the Future in Mind

Spring is also when many people start thinking about planting. Choosing the right tree for the right space is critical in an established community, where lot sizes, overhead lines, and mature canopies vary widely. Consider a tree’s mature size, root space, and sun exposure before planting. Native and hardy species tend to perform best in Alberta’s variable weather.

Trees and Community

Trees do more than add beauty. They shade our homes, improve air older neighbourhoods with deep roots, many trees have been growing for decades. Caring for them is a way of investing in the future of the community.

As we move into spring, a little attention goes a long way. Whether it’s pruning, watering, or simply taking time to notice changes after winter, thoughtful tree care helps ensure our urban forest remains healthy and resilient for generations to come.

If you have questions about your trees or concerns after winter, reach out to a certified arborist for advice. Spring is a season of renewal—for trees and for all of us who enjoy them.

Lisa Sullivan is a certified arborist, registered consulting arborist and owner of Cowboy Trail Tree Service. 🌳