October is one of the most important months to fertilize your Oklahoma lawn. Fall fertilization helps your Bermuda grass store nutrients before winter dormancy, leading to faster green-up and stronger growth the following spring. For fescue lawns, fall is the primary growing season, making fertilization even more critical. Apply fall fertilizer before the first hard freeze, typically by mid-November in the Tulsa area. Complete Lawn Care’s 7-step program includes properly timed fall fertilization for maximum results.
Why Fall Fertilization Matters in Oklahoma
Many homeowners think of spring as the main fertilization season, but fall is equally important. Here’s what happens when you fertilize in fall:
Root development: As air temperatures cool but soil stays warm, grass shifts energy from blade growth to root development. Fall fertilizer feeds this critical root-building phase.
Nutrient storage: Bermuda grass stores carbohydrates and nutrients in its roots and stolons before going dormant. Well-fed grass has more reserves to draw on when spring arrives.
Faster spring green-up: Lawns that received fall fertilization consistently green up earlier and more vigorously in spring than lawns that didn’t.
Better weed resistance: A thick, healthy lawn going into winter means a thick lawn coming out of winter. Thick turf crowds out weeds naturally.
When to Apply Fall Fertilizer in Oklahoma
For Bermuda grass: Apply fall fertilizer in October, before the lawn goes fully dormant. You want the grass still active enough to absorb nutrients but cool enough that growth is slowing. Mid-October is often ideal in the Tulsa area.
For fescue grass: Fescue benefits from fertilization in September AND November. Fall is fescue’s primary growing season in Oklahoma, so it needs more feeding during this time than in summer.
Stop fertilizing: Don’t fertilize Bermuda after the first hard freeze or once it’s gone fully brown and dormant. The grass can’t absorb nutrients when it’s not actively growing.
What Type of Fertilizer to Use in Fall
Fall fertilizer should have a different nutrient balance than spring fertilizer. Look for:
Higher potassium (K): Potassium (the third number in N-P-K) strengthens cell walls and improves cold hardiness. A formula like 15-0-15 or 12-0-12 works well for fall.
Moderate nitrogen (N): You want enough nitrogen to feed the plant but not so much that it promotes tender new growth that can’t survive frost.
Low or no phosphorus (P): Most Oklahoma soils have adequate phosphorus. Adding more isn’t necessary and can cause environmental issues.
Complete Lawn Care uses professional-grade fall fertilizers specifically formulated for Oklahoma lawns. We adjust the formula based on soil test results and your lawn’s specific needs.
Common Fall Fertilization Mistakes
Using spring fertilizer in fall: High-nitrogen spring formulas promote leaf growth, not root development. That’s the opposite of what you want before winter.
Fertilizing too late: Once grass is dormant, it can’t absorb fertilizer. Your product just sits there until spring (if it doesn’t wash away first).
Skipping fall entirely: Many homeowners stop thinking about their lawn once summer ends. This is a missed opportunity that affects next year’s performance.
Over-applying: More is not better. Excess fertilizer can burn grass, pollute waterways, and waste money. Follow label rates or hire a professional.
Fall Fertilization as Part of a Complete Program
Fall fertilization works best as part of a year-round lawn care program. Complete Lawn Care’s 7-step program includes multiple fertilizer applications throughout the growing season, each timed and formulated for what your lawn needs at that moment. Our fall application is specifically designed for Oklahoma’s climate and grass types.
We also recommend annual soil testing to know exactly what your lawn needs. Without a soil test, you’re guessing. Complete Lawn Care offers soil testing as part of our services.
Contact Complete Lawn. Care:
Phone: (918) 605-4646 | Email: [email protected] | Online: completelawncaretulsa.com/get-a-quote