Spring Fertilizer Timing (Turf vs Landscape)

Purpose

Feed plants when they can use nutrients, not when we want them to grow.

Fertilizer does not wake grass up.
Temperature does.

What Is Happening in Turfgrass

Grass greens when the crown and roots become active.

Root activity begins when soil temperatures stabilize above ~65°F.

Before that:
Nutrients sit unused
Or feed weeds instead of turf

Why Early Fertilizing Causes Problems

Applying nitrogen too early:

• Encourages top growth before roots

• Weakens drought tolerance

• Increases disease risk

• Makes turf dependent on fertilizer

You get a greener lawn temporarily but a weaker lawn long term.

Correct Timing

Wait for:
Consistent growth, not just color

When mowing frequency increases naturally, the plant is ready.

What You CAN Fertilize Now

Trees, shrubs, and beds respond differently.

They have active roots earlier than turf.

Use slow-release fertilizer in landscapes safely during this period.

Common Mistakes

• Trying to force green color

• Matching neighbor’s lawn color

• Fertilizing during temperature swings

• Confusing cosmetic improvement with plant health

Expected Results

Proper timing:

• Stronger roots

• Thicker turf

• Less summer stress

Bottom Line

Green grass is a temperature response.
Healthy grass is a timing decision.