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When to plant grass seed in zone 9b

In zone 9b, where the last spring frost typically comes around January 31, sow outdoors December 20 to January 3. For a fall crop, plant October 28 to November 11.

The zone 9b schedule for grass seed

Sow outdoors
December 20 to January 3
Plant for a fall crop
October 28 to November 11

From the median frost dates of the NOAA stations assigned to the 1,459 ZIP codes in zone 9b, and the timing recommended by Cooperative Extension guides for grass seed.

Frost risk in zone 9b

Zones are based on winter cold, not on frost dates, so the last spring frost varies a lot within a zone. Across zone 9b, the typical last frost ranges from about January 12 in the earliest tenth of ZIP codes to March 1 in the latest tenth, and the first fall frost from January 8 to December 28. For a typical place in the zone:

  • December 18Risky: a later frost happens in 9 years out of 10
  • January 31Typical: frost after this date in half of years
  • March 1Safe: a later frost only 1 year in 10

Your dates for grass seed

Set your ZIP code at the top of the page and we will work out when to plant grass seed where you live, from the frost records of the nearest NOAA weather station. Your ZIP code is remembered on this device only.

Enter your ZIP code

Grass Seed in zone 9b cities

CityTypical last frostPlantFall
Houston, TXJan 30Dec 19 to Jan 2Nov 16 to 30
Jacksonville, FLFeb 1Dec 21 to Jan 4Nov 24 to Dec 8
San Jose, CAJan 12Dec 1 to 15Nov 10 to 24
Fresno, CAJan 14Dec 3 to 17Nov 2 to 16
Sacramento, CAJan 12Dec 1 to 15Nov 4 to 18
Bakersfield, CAJan 17Dec 6 to 20Nov 3 to 17
New Orleans, LAJan 24Dec 13 to 27Nov 21 to Dec 5
Henderson, NVJan 20Dec 9 to 23Nov 3 to 17

How to grow grass seedAll zonesGrass Seed in zone 9aAbout zone 9b

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