Question 1

When should I plant spinach in ZIP 95113?

Accepted Answer

In ZIP 95113, the main spinach target is around Jan 18, based on the representative San Jose frost station and USDA zone 9b.

Question 2

When should I start spinach seeds indoors in 95113?

Accepted Answer

Spinach is usually direct-sown for ZIP 95113. Use the Jan 18 planting window instead of starting it indoors.

Question 3

When is the last frost in San Jose?

Accepted Answer

San Jose (ZIP 95113) has an average last spring frost around Feb 15, based on the representative San Jose frost station.

Question 4

When is the first frost in San Jose?

Accepted Answer

San Jose (ZIP 95113) has an average first fall frost around Dec 1, leaving about 289 frost-free days.

Question 5

Is this a guaranteed planting date?

Accepted Answer

No. GrowZone uses frost-date estimates, hardiness zones, and crop timing rules for planning. Local microclimates and current weather can shift the right date.

Spinach is usually direct-sown around Jan 18

Spinach dates for San Jose, CA