The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of estimating when it's possible to plant snow peas is to check out the USDA zone info for Columbia.

Planting Calendar for Snow peas

Frost tolerance for snow peas:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since snow peas are very cold tolerant you can plant them quite a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant snow peas in Columbia is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant snow peas and expect a good harvest is probably September. You probably don't want to wait any later than that or else your snow peas may not have a chance to grow to maturity. Starting your snow peas indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Columbia the average date of last frost happens on April 15. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Columbia is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Columbia you get surprised by a frost after April 15 so always be ready to protect your snow peas in the event of a surprise late frost.

USDA Zone Info for Columbia

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Columbia

You may be interested in your other planting guides for Columbia.