One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of figuring out when it's the best time to plant delphinium is to consult the USDA zone info for Menominee.

Planting Calendar for Delphinium

Frost tolerance for delphinium:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Delphinium do ok in moderate cold which means that you can start planting them slightly earlier than more sensitive plants.

The earliest that you can plant delphinium in Menominee 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 delphinium and expect a good harvest is probably August. Any later than that and your delphinium may not have a chance to really do well. Starting your delphinium indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Menominee. In the coldest months of winter you should expect an average low temperature of -15°F.

Since the USDA zone info for Menominee is just an average the actual date of last frost will vary from year to year. Since half of the time in Menominee you get surprised by a frost after April 15 be ready to protect your delphinium in the event of a late frost.

USDA Zone Info for Menominee

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Menominee

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