Growing watermelon in zone 9b

In USDA zone 9b, the typical last spring frost is February 1 and the first fall frost is December 9. Here is when to plant watermelon against those dates.

Transplant outdoorsFebruary 1 to February 15

Direct sow outdoorsFebruary 1 to February 15

Expected harvestApril 27 to May 16About 85 to 90 days from transplanting.

These are zone 9b averages

Computed from 2,081 ZIP codes in zone 9b. Your town's frost dates vary; enter your ZIP for dates built on your nearest weather station.

Get my exact dates

USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service / Oregon State University PRISM Group. NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020. Planting windows for watermelon from Clemson Cooperative Extension, Home & Garden Information Center. Zone dates are medians; local conditions vary.