When can I plant Spinach in Zone 1a

The USDA Zone info is a great tool for gardeners to help us estimate our gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

The best time to plant spinach in Zone 1a should be determined by reviewing the USDA zone info.


Planting Calendar for Spinach

Frost tolerance for spinach: Tolerant of some frost.
When you should plant them: Up to 5 weeks before last frost.

Since spinach do well in moderate cold you can plant them a little bit earlier in the year than other plants that might not handle the cold.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant spinach
Possibly ok, but a risky time to plant spinach
Probably not a good time to plant spinach

The earliest that you can plant spinach in Zone 1a is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant spinach and expect a good harvest is probably July. You probably don't want to wait any later than that or else your spinach may not have a chance to fully mature. Starting your spinach indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on June 15 in Zone 1a. We can expect an average low temperature of -60°F in the coldest months of winter.

Always keep in mind that our actual date of last frost is not always accurate because it is based on the USDA zone info for Zone 1a and it will vary from year to year. Since half of the time in Zone 1a it frosts late in the year after June 15 be ready to cover your spinach if we have a late frost.

USDA Zone Info for Zone 1a

Here is the info for USDA Zone 1a.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-60°F
Highest Expected Low-55°F

This means that on a really cold year, the coldest it will get is -60°F. On most years you should be prepared to experience lows near -55°F.

Plants to Grow in Zone 1a

You may be interested in our other planting guides for Zone 1a.