When can I plant Borage in River Forest, IL

Before planting it is a good idea to find our USDA Zone info to figure out our garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

In River Forest you can estimate when to plant borage by referring to the USDA zone info.


Planting Calendar for Borage

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

Borage are moderately cold tolerant which tells us that you can plant them a little bit earlier than other plants that might not handle the cold.

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

The earliest that you can plant borage in River Forest 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 borage and expect a good harvest is probably September. You probably don't want to wait any later than that or else your borage may not have a chance to fully mature. Starting your borage indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in River Forest. In the coldest months of winter we should expect an average low temperature of -10°F.

It's important to remember that our actual date of last frost is an average because it is based on the USDA zone info for River Forest and it will vary from year to year. Half of the time in River Forest we get surprised by a frost after April 15 so be sure to be ready to protect your borage in the event of a surprise late frost.

USDA Zone Info for River Forest

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 River Forest

You may be interested in our other planting guides for River Forest.