One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first opportunity to plant scarlet pimpernels in Forest Park should be determined by reviewing the USDA zone info.

Planting Calendar for Scarlet Pimpernels

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

Scarlet Pimpernels are one of those plants that can tolerate a tiny bit of cold weather which tells us that you can plant them slightly earlier than other frost tender plants.

The earliest that you can plant scarlet pimpernels in Forest Park 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 scarlet pimpernels and expect a good harvest is probably August. If you wait any later than that and your scarlet pimpernels may not have a chance to fully mature. Starting your scarlet pimpernels indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Forest Park. In the coldest months of winter you can expect an average low temperature of 10°F.

Since the USDA zone info for Forest Park may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Forest Park last frost occurs after March 15 so make sure that you are ready to cover your scarlet pimpernels if you have a late frost.

USDA Zone Info for Forest Park

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

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

Plants to Grow in Forest Park

You may be interested in your other planting guides for Forest Park.