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

The earliest that you can plant primroses in South Beloit can be determined by looking at the USDA zone info.

Planting Calendar for Primroses

Frost tolerance for primroses:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Primroses are one of those plants that can tolerate quite a bit of cold weather which tells us that you can plant them a quite a bit earlier than more sensitive plants.

The earliest that you can plant primroses in South Beloit 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 primroses and expect a good harvest is probably September. Any later than that and your primroses may not have a chance to really do well. You can get started a few weeks earlier by starting your primroses indoors.

Last Frost Date

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

Remember that USDA zone info for South Beloit may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in South Beloit you get a frost after April 15 so make sure that you are prepared to cover your primroses if you have a late frost.

USDA Zone Info for South Beloit

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 South Beloit

You may be interested in your other planting guides for South Beloit.