🥬 When to Plant Spinach

When should I plant spinach?

Plant spinach outdoors 6 weeks before last frost. For a head start, start seeds indoors 4 weeks before your area's last frost date. Transplants can go out 4 weeks before last frost.

Is spinach frost sensitive?

Spinach can tolerate light frost, surviving temperatures as low as 25°F. This makes it a great candidate for early spring or fall planting when other crops can't go out yet.

What temperature does spinach need?

Spinach grows best between 40°F and 65°F. It can survive down to 25°F, but growth slows significantly below 40°F. It prefers cool weather and may bolt or stop producing if summer heat arrives early.

How long does spinach take to grow?

Spinach typically takes 37–50 days from transplant (or direct sow) to first harvest.

Should I start spinach seeds indoors?

Yes — start spinach seeds indoors 4 weeks before your area's last expected frost date. This gives seedlings time to develop strong roots before outdoor conditions are ready.

Is it too cold to plant spinach?

It is too cold to plant Spinach outdoors when nighttime temperatures are falling below 25°F. While Spinach can tolerate temperatures as low as 25°F, growth will be slow until nights consistently exceed 40°F. Use CanIPlant to check your local 7-day forecast and get a real-time answer for your ZIP code.

Is it too hot to plant spinach?

Spinach starts to struggle when temperatures climb above 65°F. As a cool-season crop, Spinach is especially heat-sensitive — high temperatures cause bolting, bitter flavor, or complete crop failure. Avoid planting in the peak of summer and opt for spring or fall instead. CanIPlant checks your local forecast highs to flag this automatically.

Any tips for growing spinach?

Very cold hardy. Plant early spring or fall.