One of the best tools that you have as gardeners to help us estimate 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 determining when you can plant iceland poppy is to look at the USDA zone info for Sun Prairie.

Planting Calendar for Iceland Poppy

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

Since iceland poppy do well in moderate cold you can plant them just a bit earlier in the year than more sensitive plants.

The earliest that you can plant iceland poppy in Sun Prairie 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 iceland poppy and expect a good harvest is probably September. Any later than that and your iceland poppy may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your iceland poppy indoors.

Last Frost Date

The average date of last frost is April 15 in Sun Prairie. You can expect an average low temperature of -20°F in the coldest months of winter.

Remember that USDA zone info for Sun Prairie is just an average and the actual date of last frost will vary from year to year. Half of the time in Sun Prairie you get a frost after April 15 so always be ready to protect your iceland poppy if you have a late frost.

USDA Zone Info for Sun Prairie

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Sun Prairie

You may be interested in your other planting guides for Sun Prairie.