Fall fertilization will benefit lawns by creating a healthier root system, which will mean a dense, green lawn in the spring. In Northern Colorado, lawns can be fertilized right up to Thanksgiving (late November). We recommend either Jirdon Winterizer Fertilizer (conventional) or AlphaLawn Turf Winterizer (organic).
Trees and shrubs do best with a complete fertilizer such as Jirdon Tree & Shrub Fertilizer, after the leaves have fallen.
Autumn is also a good time to add chelated iron fertilizers for iron deficiencies, which is indicated by yellow-colored leaves throughout the growing season.
When in doubt, ask one of our knowledgeable staff to help you choose the fertilizers that are right for your landscape.
Originally published on October 3rd, 2018. Updated on October 4th, 2022.