The USDA Zone info is a great tool for gardeners to help us determine 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.

In Minnetonka you can estimate when it's the best time to plant borage by using 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.

Borage are one of those plants that can tolerate a little bit of cold weather which means that you can plant them a little bit earlier than other frost tender plants.

The earliest that you can plant borage in Minnetonka is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant borage and expect a good harvest is probably August. Any later than that and your borage may not have a chance to fully mature. Starting your borage indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Minnetonka the average date of last frost happens on May 15. You should expect an average low temperature of -25°F in the coldest months of winter.

Just be sure to remember that the actual date of last frost is an average because it is based on the USDA zone info for Minnetonka and it can change quite a bit from year to year. Half of the time in Minnetonka last frost occurs after May 15 so make sure that you are prepared to protect your borage if you have a surprise late frost.

USDA Zone Info for Minnetonka

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Minnetonka

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