Lawn & Landscaping
Lawn & LandscapingUpdated 10/1/2026

How to Select and Apply Fall Lawn Fertilizer (Winterizer)

A high-potassium fall 'winterizer' feeds deep root growth so your turf stores energy and survives winter frost, greening up faster in spring.

Lawn & Landscaping
How-To Guides
Difficulty
Beginner
Time
1 hour
Budget
$$
Safety
Low

Tools needed

  • Broadcast lawn spreader
  • Protective safety eyewear
  • Garden gloves

Materials needed

  • Winterizer lawn fertilizer (high potassium)
  • Soil test kit

Step-by-step

  1. 1

    Test your soil so you choose the right nutrient balance.

  2. 2

    Pick a winterizer with a high last number (potassium) a few weeks before the first hard frost.

  3. 3

    Calibrate your broadcast spreader to the bag's setting.

  4. 4

    Apply in even, overlapping passes on dry grass.

  5. 5

    Water lightly to move the granules down to the roots.

Common mistakes

  • • Applying too late once the ground has frozen
  • • Double-spreading and burning stripes into the lawn

Maintenance & next steps

Apply once in early-to-mid fall; store leftover fertilizer sealed and dry.

When to call a professional

For large acreage or if a soil test reveals a serious deficiency needing a custom program.

Editor's note: This is instructional content for How to Select and Apply Fall Lawn Fertilizer (Winterizer). Replace with your own firsthand experience and photos before publishing.
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Scotts Turf Builder WinterGuard Fall Lawn Food
Consumable
Scotts

Scotts Turf Builder WinterGuard Fall Lawn Food

Best for: Feeding roots before winter frost

High-potassium winterizer • covers ~5,000 sq ft