
As the vibrant colors of autumn begin to take over Scarborough, it’s a sign that winter is just around the corner. For homeowners and property managers, fall is not just a time for raking leaves and prepping gardens, but also for considering the health of your trees. One key step that is often overlooked is fall tree fertilization. At Castor Tree Care Services, we’re here to explain how this crucial maintenance task can help strengthen your trees as they prepare for winter dormancy.
Why Fall Fertilization Matters
Trees in urban areas, such as Scarborough, face unique challenges. Limited root space, compacted soil, and pollution can prevent trees from accessing the essential nutrients they need to thrive. Fall fertilization helps replenish those nutrients, providing your trees with the strength they need to survive the winter and emerge healthy in the spring.
Benefits of Fall Tree Fertilization
- Strengthens Root Systems
As temperatures cool in the fall, trees enter a stage of dormancy where growth above ground slows down, but root development continues. Fertilizing during this period ensures that the tree has access to nutrients to fortify its root system. Strong roots mean a better foundation for next year’s growth, making your trees more resilient to Scarborough’s harsh winter conditions. - Increases Disease Resistance
A well-nourished tree is better equipped to resist pests and diseases, which can be prevalent in colder months. Fall fertilization helps to boost your trees’ immune systems, reducing the likelihood of damage from insects, fungi, and diseases. - Improves Spring Growth
By fertilizing in the fall, you’re setting your trees up for success when spring arrives. Trees that receive fall fertilization will have access to stored nutrients, allowing them to bloom more vibrantly and grow more robustly when the growing season begins again. - Enhances Winter Hardiness
Scarborough winters can be tough on trees, particularly those that are young or stressed. Fertilizing in the fall helps trees develop hardiness, enabling them to better withstand the cold, wind, and ice.
Choosing the Right Fertilizer for Your Trees

Not all fertilizers are created equal, and different tree species have varying nutrient needs. At Castor Tree Care Services, we recommend using a slow-release fertilizer that contains a balanced ratio of nitrogen (N), phosphorus (P), and potassium (K), often referred to as NPK. Here’s why:
- Nitrogen stimulates leaf and branch growth, helping to repair any summer damage.
- Phosphorus supports root development, critical during the fall when root systems continue to grow.
- Potassium enhances overall tree health, improving cold tolerance and disease resistance.
Our team can assess your trees and recommend the best fertilization formula to ensure optimal results for your specific landscape in Scarborough.
How and When to Fertilize Your Trees
The best time to fertilize trees in Scarborough is during late fall, after most of the leaves have fallen but before the ground freezes. This timing allows the tree to absorb nutrients and store them in the roots over the winter. Fertilizer should be applied evenly over the tree’s root zone, which often extends beyond the canopy’s edge. Deep root fertilization techniques, like the ones we offer at Castor Tree Care Services, ensure nutrients reach deep into the soil where tree roots can access them.
Trust Castor Tree Care Services for Expert Fall Fertilization
Fall tree fertilization is one of the most effective ways to give your trees the nutrients they need to survive winter and thrive in the spring. At Castor Tree Care Services, we understand the unique needs of trees in Scarborough’s urban landscape. Our certified arborists will assess your property, create a customized fertilization plan, and apply the right nutrients to keep your trees healthy year-round.
As you prepare your garden for winter, don’t forget about your trees. Fall tree fertilization is an essential step in ensuring they remain strong, healthy, and beautiful in the years to come. Contact Castor Tree Care Services today for expert advice and services on fall tree care in Scarborough.