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ZONE 6BCLUBPREMIUM GRASS SEEDSEST. 2026

Zone 6b Club · Lawn Calendar

Zone 6b Lawn Calendar

Year-round timing tuned to Zone 6b's climate window.

Winter low

-5°F

Last frost

Apr 15

First frost

Oct 20

Season

185d

Primary Overseeding Window

Sep 5 → Oct 15

The single highest-leverage window for cool-season seed in Zone 6b.

Quarter

Spring in Zone 6b

  • ▪Early-mid April: pre-emergent crabgrass at soil temp 55°F
  • ▪First mow at 4 inches; maintain 4 inches in 6b for heat resilience
  • ▪0.75 lb N/1000 sqft late April–early May
  • ▪Spot-overseed freeze-thaw damage with PRG (quick) or TTTF

Quarter

Summer in Zone 6b

  • ▪Mow at 4 inches — taller cut buys you 5°F of resilience
  • ▪1.5–2" water per week; deep + infrequent; early-morning only
  • ▪Skip June–July fert on TTTF (brown patch trigger)
  • ▪Brown patch is real — fungicide rotation if you want showcase

Quarter

Fall in Zone 6b

  • ▪Primary overseeding window: Sep 5 – Oct 15
  • ▪1 lb N/1000 sqft early-mid September (year's most important fert)
  • ▪Aerate compacted areas + overseed thin spots
  • ▪Final mow at 2.5 inches late November

Quarter

Winter in Zone 6b

  • ▪Mostly dormant Dec–February but green weeks in mild years
  • ▪Light snow cover, freeze-thaw cycles common
  • ▪Plan spring purchases in January

Continue at Premium Grass Seeds

Build the fall window before it opens.

Use the calendar for timing, then move through the three buying decisions in order. Start with the zone-filtered seed comparison, then use the matching starter and equipment guides. The seed comparison stays anchored to Zone 6b.

  1. 1 · Seed

    Compare zone-fit fall seed

    Start with overseeding options that list this zone, then confirm the local establishment window.

    Open: Compare zone-fit fall seed → (opens in a new tab)

  2. 2 · Starter

    Pair the starter fertilizer

    Pick the establishment feed after the seed; it is not a substitute for it.

    Open: Pair the starter fertilizer → (opens in a new tab)

  3. 3 · Equipment

    Stage the overseeding tools

    Choose the spreader, prep, and watering gear before the window opens.

    Open: Stage the overseeding tools → (opens in a new tab)

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