Where’s your lawn?
A nearby city is all we need as a climate reference — nothing is uploaded.
Soil temp Timing Seed scores
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Fall pre-emergent
Winter-annual / Poa preventer in late summer. Conflicts with fall overseeding.
Timing An afternoon
Primary window · soil unchecked
Winter annuals / Poa. Skip this pass if you plan to seed this fall.
Soil gate: Soil temp unknown — Using calendar windows only
Why
Poa and henbit germinate as soils cool. A fall barrier helps if you are not seeding.
Steps
- Decide this season: fall seed, or fall pre-em — not both with a typical preventer.
- Apply while soil is still warm enough for the product to bind (often Aug–Sep).
- Water in per label.
- Log the date so you do not seed into the residue.
What you need
Equipment
- Spreader or sprayer
- PPE — gloves, eye protection, long sleeves
Buy before you start
- Pre-emergent granule or liquid
How much
Apply about 15.0 lb across 5,000 sq ft (3 lb / 1000).
Typical 0.37%-class crabgrass preventer. Bag rate for YOUR concentration wins.
Edited rates save in this browser for next time.
Caveats
- If this app is telling you to overseed, skip fall pre-em unless the label allows seeding.
- Split applications and wait intervals are product-specific.