When to Plant Borage in Granite City, IL

Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can figure out when to plant borage in Granite City by looking at the USDA zone info.


Planting Calendar for Borage

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

You can plant borage a bit earlier in the year because they are moderately cold tolerant.

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 Granite City 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. If you wait any later than that and your borage may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your borage indoors.

Last Frost Date

In Granite City the average date of last frost happens on April 15. You can expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Granite City is an average the actual date of last frost changes from year to year. Since half of the time in Granite City you get a frost after April 15 be ready to cover your borage if you have one of those late frosts.

USDA Zone Info for Granite City

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)April 15
Average Date of First Frost (fall)October 15
Lowest Expected Low-5°F
Highest Expected Low0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Granite City

You may be interested in your other planting guides for Granite City.