When can I plant Basil in Zone 3b

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

In Zone 3b you can determine when it's the best time to plant basil by referring to the USDA zone info.


Planting Calendar for Basil

Frost tolerance for basil: Not tolerant of frost.
When you should plant them: After the last frost.

Basil are not cold tolerant which means that it's important to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

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

The earliest that you can plant basil in Zone 3b 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 basil and expect a good harvest is probably August. You probably don't want to wait any later than that or else your basil may not have a chance to really do well. You can get started a few weeks earlier by starting your basil indoors.

Last Frost Date

In Zone 3b the average date of last frost happens on May 15. In the coldest months of winter we should expect an average low temperature of -35°F.

It's important to remember that our actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Zone 3b and it can change quite a bit from year to year. Since half of the time in Zone 3b there is a last frost after May 15 be ready to cover your basil if we have a surprise late frost.

USDA Zone Info for Zone 3b

Here is the info for USDA Zone 3b.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-35°F
Highest Expected Low-30°F

This means that on a really cold year, the coldest it will get is -35°F. On most years you should be prepared to experience lows near -30°F.

Plants to Grow in Zone 3b

You may be interested in our other planting guides for Zone 3b.